1. Why Must You Replace Filters Periodically?

Many users mistakenly believe that a filter is just a simple mesh screen that can be reused indefinitely after a quick vacuum or wipe. However, this is a dangerous misconception for your health.

The structure of modern filters, especially HEPA filters, consists of millions of ultra-fine glass or plastic fibers randomly layered. They work through mechanisms of interception, impaction, and diffusion to trap microscopic PM2.5 dust particles. When the “gaps” between these fibers are filled with dust, bacteria, and mold, filtration efficiency drops significantly.

• Protect Respiratory Health: A new filter removes 99.97% of fine dust, bacteria, and allergens.

• Save Energy: A clean filter allows air to circulate easily, reducing the load on the motor.

• Extend Device Lifespan: Prevents the machine from overheating due to overworking.

2. Filter Replacement Timeline

Each type of filter has a different structure and lifespan. Below is a quick reference table for recommended replacement times:

2.1. Important Notes from Puritrak Experts

• Regarding HEPA Filters: This is the most sensitive component. Leaving a dirty HEPA filter in place not only reduces efficiency but also allows bacteria to accumulate and recirculate into the room. When the filter turns dark gray or black, replace it immediately.
• Regular Cleaning: Washing the pre-filter frequently (every 2 weeks) is the most effective way to extend the life of the expensive HEPA and Activated Carbon filters inside.
• Specific Environments: If your home is near a construction site or you have many pets, the HEPA replacement time may be shortened to 4–5 months.

3. Factors Affecting Filter Lifespan

The 6–12 month figure is only an average estimate. The actual replacement frequency depends on three factors:

3.1. Air Quality Index (AQI) at Your Location

If you live in “pollution hotspots” like Hanoi or Ho Chi Minh City, or in apartments near main roads, industrial zones, or construction sites, the filter must work at extremely high intensity. In environments where the AQI is frequently above 150, the HEPA filter’s lifespan may be cut down to just 4–5 months.

3.2. Operating Frequency

A machine running 24/7 to maintain a clean space will accumulate dust much faster than one only turned on for 8 hours at night. Additionally, frequently using “Turbo” or “Auto” modes in polluted environments causes the filter core to saturate more quickly.

3.3. Room Size and Specific Conditions

• Pets: Pet hair is the enemy of pre-filters and HEPA filters, as it builds up and blocks airflow.

• Smoking/Cooking: Smoke and grease are highly adhesive. They not only clog the HEPA filter but also cause the activated carbon filter to lose its deodorizing ability quickly due to a thin oil coating.

• Room Area: Using a small-capacity machine for a room that is too large will force the motor to overwork, causing the filter to degrade faster.

4. Signs It’s Time to Change Your Filter

Don’t wait until the machine makes strange noises or stops working. Watch for these “distress signals”:

• Filter Reset Light Flashing: Most modern brands like Xiaomi, Sharp, Daikin, and Coway have timers or pressure sensors. When this light turns on, inspect or replace the filter immediately.

• Visible Color Change in HEPA Filter: Open the cover and check. A new HEPA filter is usually pure white. When it turns light gray, dark gray, and eventually pitch black, it means dust has filled every corner.

• Strange Odors from Air Outlet: If you smell sourness, dampness, or a musty odor when the machine is on, the activated carbon is saturated or mold has grown on the HEPA filter.

• Decreased Filtration Efficiency: If the air still feels stuffy or family members continue to sneeze and have runny noses despite the machine running all day.

• Weak Airflow and Increased Noise: When the filter is clogged, the air coming out will be weak even on the highest setting. The fan may also emit a whistling or louder-than-usual noise due to the effort required to pull air through.

5. Tips to Extend Filter Life and Save Costs

To optimize usage costs, Puritrak recommends:

1. Clean the pre-filter weekly: This is the first line of defense, keeping the internal HEPA filter clean for longer.

2. Use a vacuum cleaner: Use a small nozzle to gently clean surface dust on the HEPA filter (be careful not to tear the material).

3. Machine Placement: Place the machine at least 30cm away from walls and avoid hidden corners to ensure the best airflow circulation.

6. Puritrak – Specialized Air Quality Management Solutions

If you are concerned about your indoor air quality or aren’t sure if your filter needs replacing, Puritrak Environmental Solution JSC is your trusted partner. We don’t just sell devices; we provide comprehensive clean air solutions:

• Smart Air Quality Monitors: Track PM2.5, HCHO, and CO2 indices in real-time via a mobile app.

• AQM Filtration Solutions: Specialized systems designed for offices, schools, hospitals, and luxury apartments.

• Professional Maintenance Services: We provide genuine filters for all brands on the market. Our technicians support deep cleaning and on-site filter replacement.

FAQ – Frequently Asked Questions

• Can HEPA filters be washed with water? Absolutely NOT. Water destroys the fiber structure of the HEPA filter, removing its ability to trap fine dust. Only dry clean with a vacuum or soft brush.

• Why is my “Change Filter” light on for a new machine? This could be due to a dirty dust sensor or an extremely polluted environment. Try cleaning the sensor and resetting the machine according to the manufacturer’s manual.

See more: Air Purifiers rental services

Puritrak products and services:

• • Puritrak air purifier
  • Puritrak indoor air quality measuring device
  • Puritrak outdoor air quality measuring device
  • AQM solution

Contact information:

• Hotline: 0904.800.006
• Website: puritrak.com
• Email: Info@puritrak.vn
• Fanpage: Puritrak

1. Why Should Businesses Care About Office Air Quality?

Many people believe that only outdoor air is polluted. However, in reality, indoor air—especially in offices—can be just as polluted, or even worse, if not properly controlled.

1.1. Offices Are Enclosed Spaces Where Pollutants Easily Accumulate

Most modern offices:

• Keep doors closed to use air conditioning

• Have limited natural ventilation

• Accommodate many people for long periods

These conditions allow pollutants to remain trapped and accumulate, including:

• Fine dust (PM2.5), pollen

• Airborne bacteria and viruses

• Odors from air conditioning systems, furniture, and paint

• Chemical vapors from printing paper, ink, and office supplies

1.2. Direct Impact on Health and Work Performance

Poor indoor air quality can lead to:

• Fatigue, headaches, and difficulty concentrating

• Respiratory irritation and allergies

• Increased risk of disease transmission in crowded environments

• Reduced productivity and employee morale

In the long run, this is not only a health issue but also affects operational costs and the professional image of a business.

Therefore, office air purifiers are considered an essential solution for proactively and sustainably improving the working environment.

2. Office Air Purifier Rental Service – Puritrak

Instead of making a large upfront investment to purchase equipment, many businesses now choose office air purifier rental services to optimize budgets and maintain flexibility.

Puritrak provides professional air purifier rental solutions suitable for all office sizes—from small businesses to large buildings and workspaces.

2.1. Flexible Solutions with Optimized Costs

When using Puritrak’s office air purifier rental service, businesses benefit from:

Cost savings on initial investment
No need to spend heavily on purchasing new machines, especially high-capacity models designed for offices.

Flexible adjustment based on space and workforce
Puritrak advises on the most suitable equipment for each area and allows easy adjustments when offices expand or layouts change.

Regular maintenance, cleaning, and filter replacement
All maintenance, cleaning, and filter replacement are handled periodically by Puritrak, ensuring stable and efficient operation.

Fast technical support
A dedicated technical team is always ready to assist, giving businesses peace of mind throughout the rental period.

3. What Criteria Should an Office Air Purifier Meet?

Choosing the right equipment is key to ensuring effective air purification.

At Puritrak, recommendations are based on:

Capacity suitable for room size

Effective filtration of PM2.5, bacteria, and viruses

Multi-layer filtration systems for odor removal

Quiet operation with minimal noise disruption

Easy monitoring and management of air quality

Selecting the right air purifier not only saves costs but also ensures optimal air purification performance.

4. Who Should Choose Office Air Purifier Rental Services?

Puritrak’s office air purifier rental service is especially suitable for:

• Open-plan offices, enclosed spaces, and high-occupancy workplaces
• Businesses organizing events, conferences, or meetings
• Coworking spaces, studios, and meeting rooms
• Short-term businesses or those not ready to invest in purchasing equipment
• Offices undergoing renovation or repairs that require temporary dust control

5. Puritrak – A Trusted Partner for Businesses

With extensive experience in air quality treatment and management, Puritrak is committed to delivering effective, tailored, and sustainable solutions for businesses.

Puritrak guarantees:

• Genuine, high-performance equipment
• Professional and dedicated service
• Customized solutions for each specific space
• Long-term partnership in protecting employee health

Contact us today for a free consultation

• Improve office air quality
• Enhance employee health and workplace experience
• Reduce infection risks – increase productivity

Puritrak’s office air purifier rental service is the solution you’re looking for to create a clean, healthy, and sustainable working environment.

Read more:Puritrak’s Air Purifiers & Air Quality Management Devices

Puritrak products and services:

• Puritrak air purifier
• Puritrak indoor air quality measuring device
• Puritrak outdoor air quality measuring device
• AQM solution

Contact Info:

• Hotline: 0904.800.006
• Website: puritrak.com
• Email: Info@puritrak.vn
• Fanpage: Puritrak

Full-service air purifier rental has emerged as the perfect solution, addressing both economic concerns and operational efficiency. Why is this trend exploding? Let’s dive into the details below.

1. What is Full-Service Air Purifier Rental?

This is a service where you pay a fixed monthly fee to use high-end air purification equipment. Instead of spending a large amount of capital to buy the device outright, full-service air purifier rental  model provides several complimentary benefits:

• Delivery & Installation: On-site support.

• Maintenance & Cleaning: Performed periodically according to a set schedule.

• Filter Replacement: Includes HEPA and activated carbon filters when they expire.

• Repair/Replacement: Immediate handling if any technical faults occur.

Reference: Visit https://puritrak.com/en/renting-air-purifiers-in-hanoi/to choose a plan that fits your budget.

2. 5 Golden Benefits of Full-Service Air Purifier Rental

Many customers wonder: “Why rent when I can buy?” The comparison table below highlights the significant differences:

2.1. Optimizing Cash Flow

Equipping a large-scale air filtration system requires massive capital expenditure (CAPEX), which can be a burden for businesses. Choosing an full-service air purifier rental shifts this to operating expenditure (OPEX). According to the World Health Organization (WHO), improving indoor air quality is vital for productivity, and renting makes it financially accessible.

2.2. Guaranteed Air Quality Standards

A purifier’s effectiveness depends 80% on the filter quality. With our full-service air purifier rental, technicians visit periodically to measure fine dust levels ($PM_{2.5}$) and replace filters on time, ensuring the air is always as fresh as new. You can check more about our Indoor Air Quality Monitors to see the real-time difference.

2.3. Flexible Equipment Upgrades

Air cleaning technology evolves quickly. When renting, you can easily request an upgrade to the latest models, such as the Airsen AS800, preventing the waste of outdated equipment.

3. Who Should Use Air Purifier Rental Services?

This service is particularly optimized for the following groups:

• Offices & Corporate Buildings: Need a large volume of units and VAT invoices. Professional maintenance boosts employee productivity.

• Schools & Kindergartens: Require a safe environment for students but often have limited investment budgets.

• Expats: Foreigners staying in Vietnam for short terms (6 months – 1 year). Buying and then reselling equipment is inconvenient.

• Events & Workshops: Short-term rentals to ensure fresh air for guests.

• Families: Those who want to experience high-end models (such as Airsen AS488, Airsen AS800, etc.) before committing to a purchase.

4. Criteria for Choosing a Reputable Rental Provider

To avoid renting full-service air purifier, keep these points in mind:

1. Diverse Product Range: The provider must offer genuine machines with capacities suitable for areas from $20m^2$ to $100m^2$.

2. Clear Maintenance Protocol: A commitment to specific cleaning frequencies (e.g., every 3 months).

3. Transparent Contracts: Clear terms regarding deposits and responsibilities for damages.

4. 24/7 Technical Support: Technicians should be available to resolve issues within 24-48 hours.

5. Puritrak – The Pioneer in Air Purifier Rentals

Looking for a comprehensive clean air solution? Puritrak is the leading name in the Vietnamese market, providing professional “Air Quality Management Services.”

Why choose Puritrak?

• Premium Equipment: Systems imported under European and Korean standards.

• Monitoring Technology: Specialized measuring devices to report actual efficiency.

• Trusted Partner: Successfully implemented for Sky West Lake School, various embassies, and major corporations.

Check out our completed projects here: Puritrak Projects

Conclusion

Full-service air purifier rental is a smart economic move and a convenient long-term commitment to your health. Don’t let your lungs do the work of an air purifier.

Enjoy fresh air today! Let us take care of every breath in your space. Contact us now for a free consultation and site survey!

Puritrak Products & Services:

• Air Purifiers

• Indoor Air Quality Monitors

• Outdoor Monitoring Stations

• AQM Air Filtration Solutions

Contact Puritrak Information:

• Hotline: 0904.800.006

• Website: puritrak.com

• Email: Info@puritrak.vn

So, what are the outstanding benefits that make this option so popular?

1. The unforeseen dangers of polluted air in winter

Before exploring the solution, we need to understand the potential risks. When temperatures drop, the habit of closing doors and windows to keep warm inadvertently creates a perfect environment for harmful agents to multiply:

• Mold thrives on walls, clothes, and bedding
• Flu and cold viruses spread rapidly in enclosed spaces
• PM2.5 fine dust accumulates from sources: cooking, heating, tobacco smoke
• CO2 levels increase due to lack of ventilation

According to the World Health Organization (WHO), indoor air pollution is classified as one of the top dangers to public health.

2. 05 unmissable benefits of renting an air purifier

2.1. Maximum cost savings – a smart economic solution

This is the primary benefit leading many to choose renting over buying. Instead of spending a large sum to own a high-end air purifier, you only need to pay a small monthly fee.

• No large initial investment: Suitable for all budgets, from households to small and medium-sized businesses. With a reasonable fee based on a chosen cycle, customers can use suitable air purifiers and air management systems.
• Cost optimization: Customers only pay for the period they actually need to use, especially in winter – when air quality deteriorates severely.
• No maintenance or repair costs: All incidental fees are calculated in the rental package, allowing service users complete financial control.

2.2. Flexibility & meeting every needs

Rental services offer absolute flexibility that purchasing cannot easily match.

• Rental for the necessary duration: Customers can easily rent air purifiers monthly, quarterly, or yearly based on their needs. When winter ends or the need has ceased, users can return the unit instead of struggling to find storage for the equipment.
• Easy unit exchange and upgrades: Needs alterations? Users can request to switch to a higher-capacity model, one with added humidification features (essential for dry, cold winters), or more advanced filtration technologies without worrying about liquidating the old unit.
• Suitable for all spaces: From a 15m² bedroom to a 100m² office, there will always be suitable products without needing to invest in multiple units simultaneously.

2.3. Experience authentic products with the latest technology

Reputable rental companies like Puritrak always provide high-end, genuine air purifiers from famous brands.

• Guaranteed optimal filtration efficiency: You will use newer models with HEPA, activated carbon technologies… helping remove 99.97% of PM2.5 fine dust, bacteria, mold, and toxic gases. These units are often equipped with HEPA 13 or HEPA 14 filters – the highest filtration standards currently available.
• Assured quality: All units are thoroughly inspected before handover, ensuring the best operational performance for users. Each unit comes with full documentation, invoices, and genuine warranty.
• Access to new technology: When more advanced filtration technologies emerge, you can easily switch to a new model without additional initial investment costs.

2.4. Maintenance & repairments

This is a major differentiator and provides absolute peace of mind for customers. When renting a unit, all maintenance burdens are eliminated:

• Periodic maintenance and cleaning: The rental company is responsible for sending technical staff to your location to clean the unit, ensuring it always operates in the best condition. Typically, maintenance schedules are performed every 3-6 months.
• Replacement of parts and filters: The cost of replacing filter cartridges (which can be quite expensive) is already factored into the rental package. You won’t face unexpected additional costs for these. A genuine HEPA filter set costs from 1-3 million VND, but you don’t pay extra when it’s time for replacement.
• 24/7 technical support: If the unit encounters a problem, a single phone call is all it takes for the technical team to arrive for repairs or provide an immediate replacement. This is especially crucial for businesses and offices that require continuous operation.

2.5. Suitable for all user types

Air purifier rental services benefit various user groups:

• Households: Protect the health of young children, the elderly, and pregnant women – who are the most sensitive to air pollution – from disease-causing agents.
• Offices, agencies, companies: Enhance labor productivity, minimize employee sick leave due to respiratory illnesses. A clean working environment helps improve work performance.
• Clinics, spas, restaurants: Enhance reputation and professionalism by proactively protecting customer health. Clean air is an important criterion for attracting and retaining customers.
• Short-term projects: Suitable for events, conferences, or those renting accommodation for short periods.

See more: Air Purifiers rental services

3. A smart choice for comprehensive health

Renting an air purifier is not just a trend but also a smart, practical, and economical solution. This service offers flexibility and convenience, allowing you and your family to breathe clean air in the easiest way possible, especially during harsh winter months and peak pollution seasons. Consider the rental option for services and products to optimize costs and fully enjoy health benefits.

For a cost of just 1/10th to 1/20th of the unit’s value per month, you can fully possess a comprehensive health protection solution for your living and working spaces. This is not just an expense but a smart investment in the health of yourself and your loved ones.

The above answers the question “Renting an air purifier: The top air solution for winter”. If you need further information about air purifiers, please contact the details below; the technical team at Puritrak will guide and answer your questions. Thank you for reading the article

Contact Info:

• Hotline: 0904.800.006
• Website: puritrak.com
• Email: Info@puritrak.vn
• Fanpage: Puritrak

1. What is Air Pollution Index?

The air pollution index, also known as the Air Quality Index (AQI), is a technical parameter converted from the concentrations of major air pollutants. This index serves as a simplified measure to warn the community about air conditions and the potential level of impact on human health.

Simply put, the AQI is an alarm bell for your respiratory health. It converts complex data on the concentrations of various pollutants into a single number, an easy-to-remember scale, and color codes. The higher the AQI, the worse the air quality.

2. Factors measured in the Air Quality Index

The U.S. Environmental Protection Agency (EPA) determines the Air Quality Index (AQI) based on five key air pollutants:

• PM2.5 Fine Dust: Ultra-fine particles with a diameter ≤ 2.5 microns. This is often the main pollutant in major Vietnamese cities. They originate from vehicle emissions, industrial activities, straw burning, and construction. PM2.5 can penetrate deep into the lung alveoli and even enter the bloodstream, causing serious respiratory and cardiovascular diseases.
• PM10 Fine Dust: Particles with a size ≤ 10 microns. Although less dangerous than PM2.5, they can still cause irritation to the eyes, nose, and throat.
• Ozone (O3): A gas formed from chemical reactions under sunlight. Ground-level ozone is a harmful substance that irritates the respiratory tract, causing coughing and chest tightness.
• Nitrogen Dioxide (NO2): Comes mainly from fuel combustion processes (vehicles, power plants), causing pneumonia and exacerbating asthma.
• Sulfur Dioxide (SO2): Emitted from burning coal and oil, causing respiratory problems and the formation of acid rain.

3. AQI Scale analysis & meaning

The AQI scale is divided into levels with intuitive color codes, helping you easily recognize air conditions:

• Good (0 – 50) – Green: Air quality is satisfactory, air pollution poses little to no risk.
• Moderate (51 – 100) – Yellow: Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
• Unhealthy for Sensitive Groups (101 – 150) – Orange: Members of sensitive groups may experience health effects. The general public is less likely to be affected.
• Unhealthy (151 – 200) – Red: Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.
• Very Unhealthy (201 – 300) – Purple: Health alert: The risk of health effects is increased for everyone.
• Hazardous (>300) – Maroon: Health warning of emergency conditions: Everyone is more likely to be affected

Besides this 6-level system, some countries use their own systems. In South Korea, the Comprehensive Air-quality Index (CAI) is divided into 4 levels: Good – Moderate – Unhealthy – Very Unhealthy. In the United Kingdom, parameters are measured separately and divided into 10 levels (1 to 10) for environmental researchers and the public to monitor in the most specific and understandable way.

4. Checking the Air Pollution Index

You can easily track the AQI in your living area through the following tools:

4.1. Mobile Applications

• AirVisual (IQAir): Provides real-time data, AQI forecasts, and city pollution rankings.
• Plume Labs: User-friendly interface, provides the “best time of day” index for going outside.
• Weather Apps: Apps like Weather Underground or Apple Weather have integrated AQI indices.
• Puritrak’s AirNow Air Quality Management System: Allows accurate real-time monitoring of both indoor and outdoor air quality.

4.2. Reputable Websites

• AirVisual (IQAir): Provides a visual global air quality map.
• WAQI.info: An open community project providing real-time data from monitoring stations worldwide.
• Vietnam’s Environmental Monitoring Portal (by the Vietnam Environment Administration): Provides official data from domestic monitoring stations.

5. Health protection measures according to AQI levels

• Yellow (Moderate): Sensitive groups should limit prolonged outdoor activities.
• Orange (Unhealthy for Sensitive Groups): Sensitive groups should limit outdoor exposure. The general public should reduce heavy outdoor activities.
• Red (Unhealthy), Purple (Very Unhealthy), and Maroon (Hazardous):
  • Limit going outdoors: Everyone, especially sensitive groups, should stay indoors.
  • Close windows: Prevent polluted air from entering the house.
  • Use air purifiers: Choose a purifier with a HEPA filter to effectively remove PM2.5 fine dust.
  • Wear standard masks: When going outside is necessary, use N95/KN95 masks or medical masks capable of filtering fine dust.

Read more:Puritrak’s Air Purifiers & Air Quality Management Devices

Monitoring the daily air pollution index (AQI) is a necessary habit to proactively protect your and your family’s health. By understanding the meaning of the AQI and applying timely preventive measures, you can minimize the harmful effects caused by air pollution.

The above answers the question “What is the air pollution index?”. If you need information about air purifiers, please contact the details below; Puritrak’s technical department will guide and answer your questions. Thank you for reading the article!

Contact Info:

• Hotline: 0904.800.006
• Website: puritrak.com
• Email: Info@puritrak.vn
• Fanpage: Puritrak

1. Causes of the air pollution season

Air pollution is a significant alteration in the composition of the air, primarily caused by the introduction of smoke, dust, fumes, or other foreign gases, leading to unpleasant odors and direct health impacts. This phenomenon becomes more severe during the final and initial months of the year, creating a distinct air pollution season.

Numerous factors contribute to air pollution, stemming from both human-made (anthropogenic) and natural sources.

The primary causes can be divided into two main groups:

Natural Causes

• Seasonal transition and Temperature inversion: During seasonal changes, temperature inversions occur frequently, trapping pollutants at a low altitude and preventing their dispersion.
• High humidity and drizzle: High humidity levels and misty rain can contribute to the accumulation of particulate matter.
• Pollen and mold spores: Natural emissions from plants, such as pollen and mold spores.

Human-Made Causes

• Vehicle emissions: A major source of PM2.5 fine dust, NO2, and CO.
• Industrial production: Factories and industrial zones emit enormous amounts of SO2, CO2, and heavy metal dust.
• Burning of waste and agricultural debris: The burning of trash, straw, and other agricultural waste generates a massive amount of smoke and dust in a short period.
• Construction and demolition: These activities produce large quantities of dust, including hazardous fine particulate matter.

Read more: What is Air Pollution? What causes air pollution?

2. Current Status of the Air Pollution Season Situation

The situation of the air pollution season in major urban areas like Hanoi and Ho Chi Minh City has reached alarming levels:

3. How to recognize air pollution

Air pollution levels can vary by location and time of day. Here are some simple ways to identify air pollution conditions:

• Check information: You can monitor the AQI (Air Quality Index) through weather apps or local news sources.
• Assess your surroundings: Do you live near industrial zones, power plants, or busy traffic roads? If so, your risk of exposure to polluted air is very high. Emissions and dust levels from manufacturing facilities and traffic roads are typically much higher than in regular residential areas.
• Visual observation: Pollution isn’t always visible. However, you can still assess air pollution conditions with the naked eye. If you see a thick gray or yellowish-brown haze suspended in the air, this is often a sign of poor air quality.

4. Solutions for coping with the Air pollution season

With the air pollution season approaching, proactive measures are essential to protect the health of yourself and your family.

4.1. Protective measures when being outdoor

• Monitor the AQI: Use apps like AirVisual or PAM Air to check the air quality before going outside.
• Wear specialized masks: Only use masks capable of filtering PM2.5 fine dust, such as N95, KN95, or KF94. Ordinary cloth masks are largely ineffective.
• Limit outdoor activities: Avoid outdoor exercise and work on days when the AQI is high, especially during peak traffic hours.

4.2. Protective measures at Home & in Offices

• Keep windows closed: Prevent polluted outdoor air from entering indoors.
• Use an air purifier: This is the most proactive and effective solution to create a “bubble of clean air” inside. Air purifiers equipped with HEPA H13/H14 filters can remove up to 99.97% of PM2.5 fine dust, bacteria, pollen, and more.
• Grow air-purifying plants: Some indoor plants like Snake Plants, Golden Pothos, and Aloe Vera have certain air-purifying capabilities, but their effect is supplementary.
• Clean frequently: Use a vacuum cleaner with a HEPA filter to remove fine dust that has entered the home.

Protecting your health from air pollution should start today. Be proactive in learning about and applying appropriate preventive measures to safeguard yourself and your family.

The above information addresses the question “Air Pollution Season: The current status and how to cope.” If you require further information about air purifiers, please feel free to contact us using the details below; the technical team at Puritrak will be happy to assist you. Thank you for reading

Contact info:

• Hotline: 0904.800.006
• Website: puritrak.com
• Email: Info@puritrak.vn
• Fanpage: Puritrak

Air pollution is getting worse in urban areas, and air purifiers are an essential appliance in many households. But here’s the big question: Should you run your air purifier 24/24? And if you do, does it truly maximize performance, or could it actually backfire?

1. The Impact of Running an Air Purifier 24/24

Many people still believe that: “The more it runs, the cleaner the air!” However, the truth is that running your air purifier nonstop may not always be the best approach because:

+ The air inside your room smells odd, almost like disinfectant in a hospital.

+ The machine becomes noisier, sluggish, and far less efficient than when it was brand-new.

+ Your electricity bill slightly increased, even though the device consumes relatively little power.

+ You may notice dry, itchy skin or chapped lips, even when the weather isn’t particularly dry.

+ All these signs point to one thing: your air purifier may be overused and operating incorrectly.

2. Why You Shouldn’t Keep Your Air Purifier On All Day

2.1 Ion or Ozone Imbalance

Many modern air purifiers on the market now come equipped with ion generators or ozone technology to help eliminate bacteria and viruses. But when these machines run continuously in a closed indoor environment, the density of negative ions or ozone can become too high. Cause unpleasant odors. Lead to symptoms like nasal irritation or a tight chest, especially for sensitive individuals.

2.2 Should You Run Your Air Purifier 24/24, Filters Get Dirty Much Faster.

Running your air purifier 24/24 allows dust and pollutants to accumulate rapidly in the filters. Once the filter becomes overloaded, air can no longer pass through efficiently, meaning the purifier has to work harder to compensate.
This results in louder noise, higher energy consumption, heat build-up, and a noticeable drop in overall performance. Over time, this accelerates wear and tear on the machine and its components, shortening its lifespan and making it less cost-effective.

2.3 Indoor Air Becomes Too Dry

When an air purifier is used 24/24 in a closed room, air is constantly filtered without moisture replenishment or ventilation, leading to a drop in humidity. Which can cause: dry, irritated skin, chapped lips. For sensitive users: dry nose, sore throat, coughing, or trouble sleeping.
If possible, you should opt for models that include a humidifier or moisture-control feature, which helps balance moisture while purifying the air, such as the Puritrak Airsen AS488 air purifier.

3. If Running Your Air Purifier 24/24 Isn’t Ideal – What’s the Right Way to Use It?

To get the best results from your air purifier without causing side effects, it’s important to use it strategically and scientifically to maintain the most efficiency:

3.1 Use It in Cycles – Not Nonstop

There’s no need to keep your air purifier on all day long. Instead, run it during key periods when air pollution tends to spike, such as:
+ Early morning: During the night, fine dust particles settle quietly. As family members start moving around in the morning, those particles get stirred back into the air. That’s the perfect time to turn on the purifier.
+ Rush hour: This is when vehicle emissions are at their highest, especially if your home is near a busy road or urban area.
+ Targeted usage during indoor pollution: Switch on your air purifier when there are specific pollution sources inside your home, like: someone smoking indoors, cooking activities, pets shedding hair or dander.

3.2 Use the Right Modes for the Right Moments

Most modern air purifiers on the market today are equipped with air quality sensors. When set to Auto Mode, the purifier automatically adjusts based on real-time air quality, helping you save energy and extend the device’s lifespan.
For bedrooms or children’s rooms, Sleep Mode is a great choice. In this mode, the purifier runs at ultra-low noise levels, ensuring a peaceful night’s sleep.
Many models also come with timer settings or smartphone connectivity, allowing you to schedule when the machine turns off. This saves time, conserves power and prevents the purifier from running unnecessarily long.

3.3 Clean and Replace Filters Regularly

Running your air purifier 24/24 can speed up dust accumulation in the filters, reducing efficiency and requiring more frequent cleaning. Pre-filters: Clean every 1–2 months by removing and washing.
Activated carbon filters: Depending on how often the purifier is used and the environment, carbon filters usually need to be replaced every 12 to 24 months, but this can be flexible.
HEPA filters: The most important component in an air purifier.
On average, these should be replaced every 12 to 24 months, depending on the level of air pollution and how heavily the machine is used.
Regular cleaning and timely replacement of filters ensures your air purifier performs at its best, delivering consistently clean, healthy air for your home and family.

3.4 Monitor Air Quality via Sensor or Indicator Lights

After running your air purifier for a while, if the LED display turns green or the air quality index (AQI) returns to a safe level, that means the air is clean.
At this point, it’s a good idea to switch the machine to Auto Mode or let it automatically adjust based on indoor air quality, saving energy while maintaining performance.

4. Extra Tips to Maximize Your Air Purifier’s Performance

+ Place it in the center of the room for better airflow. Avoid placing it too close to walls, keep at least 30 cm of space, and steer clear of polluted corners.
+ Do not place it near heat sources like stoves, space heaters, or other heat-emitting appliances.
+ Pair it with indoor plants, a humidifier, or open windows regularly to maintain healthy humidity and oxygen levels in the room.
See more : How to Use Your Air Purifier Effectively in 2025

Above is answer of why “Should You Run Your Air Purifier 24/24?” If you need support information about air purifiers, please contact the information below. Puritrak’s technical department will guide you to answer your questions. Thank you for reading the article!

Puritrak products and services:

• Puritrak air purifier
• Puritrak indoor air quality measuring device
• Puritrak outdoor air quality measuring device
• AQM solution

Contact info:

• Hotline: 0904.800.006
• Website:com
• Email: Info@puritrak.vn
• Fanpage:Puritrak

Normally, the air pollution season in Hanoi lasts from October to March of the following year. However, this year 2025, PM2.5 fine dust still “quietly stays” until April, causing the air quality to continuously be at the level of poor – bad – very bad. This seriously affects public health, especially children, the elderly, and people with underlying respiratory diseases.

1. Why is the pollution season in Hanoi unusually longer than every year?

1.1. Overloaded emission sources

– Heavy traffic, especially in the inner city with high vehicle density, often causes congestion – emitting large amounts of NOx, CO and PM2.5 ultra-fine dust.

– Non-stop urban construction: Excavation, demolition, leveling, material transportation… create large amounts of dust, especially when there are no careful covering measures.

– Spontaneous burning of straw and waste: Still common in suburban and suburban areas, especially after each harvest season.

– Industrial activities mixed in residential areas: Many small production facilities do not have a standard exhaust gas treatment system.

All of the above factors create a “cloud of pollution” that cannot escape without favorable weather conditions, causing air pollution to increase and become difficult to control.

1.2. Adverse weather

In the first months of this year, especially in April 2025, there was little rain, high humidity, and weak winds – these conditions limit the diffusion of fine dust and polluted gases, causing them to be “stuck” close to the ground, where people breathe.

– Temperature inversion (higher air temperature is lower than lower air temperature): This phenomenon prevents air from convection, and pollutants are “trapped” in the air layer near the ground.

– Climate change: Unstable weather, unseasonal rain or prolonged heat disrupt the natural purification cycle of the atmosphere.

As a result, the air is not cleaned properly as every year, causing fine dust to persist longer and the AQI index to remain high, seriously affecting health.

2. Harmful effects of air pollution on health

Dirty air does not only cause temporary discomfort. Fine dust particles, toxic gases, bacteria and volatile organic compounds (VOCs) when entering the body can lead to a series of health problems, from acute to chronic – especially serious for people with weak resistance.

2.1. Fine dust PM2.5 – “silent killer”

Ultra-small in size (≤ 2.5 micrometers), fine dust easily penetrates the body’s natural protective layers, goes deep into the lungs, and even into the blood.

– Causes chronic bronchitis, asthma, pneumonia, and even lung cancer.

– Increases the risk of cardiovascular disease, many studies show that PM2.5 is related to high blood pressure, stroke, and myocardial infarction.

– Especially dangerous for young children, the elderly, pregnant women, and inpatients.

2.2. Bacteria, viruses – pathogens in the air

In polluted environments, bacteria and viruses can easily spread and cross-infect, especially in hospitals, schools and closed spaces. This increases the risk of acute respiratory infections, influenza, and even widespread epidemics if there are no strict air control measures.

2.3. VOCs & toxic gases – slow attack

Formaldehyde, benzene, toluene… are volatile compounds emitted from furniture, detergents, wall paint… Causing symptoms such as headaches, dizziness, nausea, skin – eye – throat irritation, neurological effects and can cause cancer if exposed for a long time.

2.4. Weakened immune system – slow recovery

In polluted environments, patients after surgery or undergoing treatment often have a prolonged recovery time due to the immune system being continuously attacked. In young children and the elderly, air pollution increases the risk of acute respiratory failure and pneumonia, causing a heavy burden on the health system.

2.5. Cost Burden and Quality of Life

Air pollution increases the number of hospital stays, treatment costs, and premature deaths each year. It reduces quality of life, labor productivity, and disrupts daily activities and learning.

3. Puritrak’s air purification solutions

In the context of increasingly unpredictable and longer-lasting air pollution, proactive solutions to filter the air in every living, working and treatment space are mandatory. Puritrak provides modern air filtration systems, applied to:

• Hospitals – ICU rooms – Operating rooms – Hospital rooms
• Schools – Classrooms – Medical rooms – Libraries
• Offices – Houses – Hotels – High-rise apartments

Advantages of Puritrak air filtration systems:
– Filter fine dust PM2.5, PM1.0, deodorize VOCs, kill bacteria in the air

– Integrated real-time air quality monitoring sensor

– Quiet operation – energy saving – easy maintenance

– Flexible design suitable for each type of space

Here is the answer to the question “Why is the pollution season in Hanoi longer than usual?” If you are considering an air purification solution for your unit, please contact Puritrak immediately for free consultation from our team of experts.

Puritrak products and services:

• Puritrak air purifier
• Puritrak indoor air quality measuring device
• Puritrak outdoor air quality measuring device
• AQM solution

Contact info:

• Hotline: 0904.800.006
• Website: puritrak.com
• Email: Info@puritrak.vn
• Fanpage: Puritrak

Clean air plays a crucial role in various sectors, including education, healthcare, and industry, as it directly impacts human health. One of the most effective solutions to maintain a fresh and safe environment is using BFU equipment. So, what exactly is BFU, and why is it important? Let’s explore this topic with Puritrak in the article below!

1. What is BFU?

BFU (Blower Filter Unit) is an integrated air purifier system consisting of a centrifugal fan (blower) and a primary filter enclosed within a metal casing. BFU units operate independently at each air outlet, reducing the need for complex installation and processing.

This device is designed to deliver clean air with high airflow and pressure, making it ideal for environments that require stringent cleanliness standards, such as cleanrooms, electronics manufacturing plants, pharmaceutical facilities, and other industrial applications.

BFU, FFU, and EFU are commonly used air purifier devices, each with different features:

• BFU (Blower Filter Unit): Uses a centrifugal fan (blower) to generate airflow. It provides higher pressure and airflow, making it suitable for cleanrooms and large-scale industrial applications.
• FFU (Fan Filter Unit): Uses an axial fan to create airflow. It has lower pressure and airflow than BFU and features a compact design, making it ideal for cleanrooms and smaller-scale applications.
• EFU (Exhaust Filter Unit): Designed specifically for air exhaust and filtration. It is usually installed at the system’s outlet and focuses on handling exhaust air rather than supplying clean air.

Due to their differences in structure, filtration performance, pressure, and operation, choosing the right unit depends on the cleanroom standards and required air purity level.

2. How Does BFU Work?

2.1. BFU Structure

BFU consists of three main components: a fan, an air filter, and an air distribution box. Each part plays a crucial role in ensuring clean air circulation.

• Fan:

Provides the necessary airflow to push air through the filter at high efficiency.

Equipped with a speed control system to optimize airflow and pressure, enhancing performance while saving energy.

Operates at high speed while maintaining low noise levels, ensuring a comfortable working environment.

• Air Filtration System:

Uses advanced HEPA or ULPA filtration technology.

HEPA filters remove at least 99.97% of particles as small as 0.3 µm, while ULPA filters achieve a higher efficiency of 99.999% for particles as small as 0.12 µm.

Made from various materials such as micro-glass fiber, PTFE, or PP, each suited for specific environments and applications.

• Air Distribution Box:

Constructed from electrostatic-coated steel, providing durability, aesthetics, and protection for internal components.

Optimally designed to evenly distribute airflow within cleanroom spaces while minimizing noise from the fan.

Integrated with modern control systems, sensors, and indicator lights for easy monitoring and operation.

2.2. BFU Operating Principle

BFU is designed for large spaces, following modern cleanroom safety principles. It facilitates selective and continuous air exchange between the indoor and outdoor environment.

Contaminated air inside the room is expelled while fresh air is drawn in from outside. During this process, the HEPA filter effectively removes particles and impurities larger than 0.3 microns, ensuring that the indoor air quality meets high standards.

3. Applications of BFU in Various Fields

3.1. Healthcare and Medical Fields

– Operating rooms and hospital cleanrooms: Maintains a sterile environment, reducing the risk of infection.

– Isolation rooms: Used in infectious disease wards, particularly during COVID-19 or for airborne disease treatment.

– Pharmaceutical production and storage: Ensures contamination-free environments in pharmaceutical manufacturing facilities.

See more: Hospital air quality status

3.2. Industrial Manufacturing

– Electronics industry: Controls dust and particles in semiconductor and microchip production.

– Food and beverage industry: Maintains hygiene standards, preventing contamination from airborne particles.

– Biotechnology: Protects sensitive environments in biological research labs and vaccine production.

3.3. Residential and Office Use

– Indoor air filtration systems: Improve air quality, especially in highly polluted or fine dust areas.

– Workspaces: Enhances indoor air quality in large office spaces, reducing respiratory disease risks.

– HVAC systems: Some central air conditioning systems integrate BFU to enhance air purification.

3.4. Aerospace and Transportation

– Aircraft and train HVAC systems: Ensures clean air circulation for passengers, reducing disease transmission risks.

– Airports and train stations: Helps maintain clean environments in waiting areas and high-traffic zones.

3.5. Research and Laboratory Applications

– Chemical and biological laboratories: Maintains stable air conditions, preventing cross-contamination.

– Quality control rooms: Ensures precision in medical, food, and pharmaceutical product testing environments.

4. Benefits of Using BFU

BFU systems offer several advantages:

• Durable stainless steel casing, resistant to corrosion while maintaining an aesthetically pleasing design.
• Flexible installation options (top, bottom, horizontal) for diverse construction needs.
• Equipped with HEPA/ULPA filters, removing 99.97% of particles as small as 0.3 microns.
• Smart airflow management system, minimizing pressure loss.
• Aerodynamic design, optimizing airflow diffusion.
• Energy efficiency, reducing operational costs.
• High-performance centrifugal fan, with a lifespan of up to 50,000 hours, providing high airflow and static pressure.
• Adjustable fan speed, offering multiple control methods.
• Easy installation and maintenance.

However, BFU systems also have some limitations:

• Higher initial investment compared to conventional air filtration systems.
• Filtration efficiency may be affected by improper installation, requiring careful placement and configuration.

5. How to Choose the Right BFU System

When selecting a BFU system, consider the following crucial factors:

• Assess the space and area of the cleanroom to select the appropriate BFU capacity and size.
• Determine the required cleanroom standard (ISO 5, ISO 6, ISO 7, etc.) to choose the corresponding filtration efficiency and the suitable HEPA or ULPA filter type.
• Required airflow capacity, calculated based on the number of air changes per hour.
• Noise level considerations for environments needing quiet operation.
• Product durability and warranty policies for long-term use.
• Smart monitoring features, such as cloud-based tracking and system-wide remote control.

See more: Air purification solutions

BFU is an essential solution for high-efficiency air purification in various applications. Its flexibility and integration capabilities with HVAC systems maximize investment efficiency.

Choosing the correct specifications and installation location is crucial for optimal performance. Consulting experts and following manufacturer-recommended maintenance schedules will ensure long-lasting effectiveness and reliability.

We hope this article has provided comprehensive information for those interested in learning about BFU devices. If you are considering an air purification solution for your facility, contact Puritrak today for a free consultation with our team of experts.

Puritrak products and services:

• Puritrak air purifier
• Puritrak indoor air quality measuring device
• Puritrak outdoor air quality measuring device
• AQM solution

Contact info:

• Hotline: 0904.800.006
• Website: puritrak.com
• Email: Info@puritrak.vn
• Fanpage: Puritrak

Clean room contruction for hospitals plays a crucial role in protecting patient health and enhancing the quality of healthcare services. So, what benefits and applications does clean room construction bring? Let’s explore this in the following article with Puritrak!

1. What is Hospital Cleanroom Construction?

Clean room contruction for hospitals involves using specialized techniques in the construction field to create a clean room that controls factors such as dust, temperature, humidity, and pressure. This ensures a sterile environment for treatment, research, manufacturing, and production.

2. Standards for Clean Rooms In Hospitals

Several standards are applied in clean rooms:

– International Standards: ISO 14644-1, FED STD 209E.

– GMP Standards: WHO GMP, EU GMP: Applied in clean rooms of pharmaceutical production facilities and hospitals.

– OSHA Standards: Occupational Safety and Health Administration (OSHA).

Other Standards in Vietnam: 

– Standard 4088 – 1985: Climatic data in construction design.

– TCVN 5687 – 1992: Ventilation design, air regulation, heating.

– TCVN 2622 – 1995: Standards for fire prevention and protection for buildings and structures.

3. Benefits of Hospital Cleanroom Construction

Clean room contruction for hospitals not only meets technical requirements but also brings numerous practical benefits for both patients and healthcare staff. Here are some notable advantages:

3.1. Infection Prevention

One of the most important benefits of clean rooms is their ability to prevent infections. By controlling microbial dust particles, the concentration of particles in the air is managed without affecting temperature, humidity, and pressure. This ensures a sterile environment that prevents infections, with bacteria unable to invade the clean room space.

3.2. Protecting the Health of Patients and Healthcare Staff

Clean rooms play a key role in protecting the health of both patients and healthcare staff. In operating rooms and intensive care units, controlling air quality and minimizing contamination is critically important. Clean rooms help significantly reduce the risk of infections, bacteria, and harmful pathogens from entering the surgical environment, thus safeguarding both patients and medical staff.

3.3. Ensuring Safe Medical Procedures

Currently, the Ministry of Health places a high priority on clean room standards. The installation of clean room systems ensures safe medical procedures, which are essential during medical examinations and treatments. Therefore, the construction of clean rooms must be executed precisely, with strict control over dust, bacteria, and humidity, allowing medical equipment to operate effectively without external interference.

4. Clean Room Construction Process

Step 1: Receive requests from the hospital and conduct a survey of the area designated for the clean room installation.

Step 2: Design the clean room layout, which will be discussed in detail with the hospital representatives regarding the construction process, including schedule, budget, structural factors, area, air circulation levels, pressure, and necessary technical documents.

Step 3: Proceed with the clean room construction using specialized equipment and materials, adhering to the strict requirements of hospital clean room standards.

Step 4: Conduct a final inspection before the clean room is put into operation.

Step 5: Maintain and manage the clean room facility.

5. Technology and Equipment in Clean Rooms

Technology and equipment in clean rooms play a crucial role in maintaining a sterile and safe environment. Below are the main technologies and equipment commonly used in clean rooms:

5.1. Air Ventilation and Filtration Systems

Ventilation System: Designed to ensure continuous airflow, helping to remove dust and bacteria. This system typically includes fans, ducts, and airflow control devices.

HEPA Filters: Utilize High-Efficiency Particulate Air (HEPA) filters that can remove at least 99.97% of particles sized 0.3 microns. These filters are highly effective in trapping bacteria, viruses, and fine dust.

5.2. Air Conditioning Systems

Air Conditioners: Used to maintain stable temperature and humidity levels in the clean room. Temperature and humidity must be tightly controlled to ensure an appropriate environment for medical procedures.

Temperature and Humidity Control Systems: Utilize sensors to monitor and adjust temperature and humidity as required.

5.3. Monitoring Equipment

 Air Quality Meters: Used to monitor dust, microorganisms, and pollutants in the air. These devices help detect early increases in contaminants and enable timely interventions.

 Automated Monitoring Systems: These systems can automatically alert when parameters exceed allowed limits, ensuring safety for patients and healthcare staff.

5.4. Construction Materials

 Wall and Ceiling Panels: Use moisture-resistant plastic or metal panels that are easy to clean and antibacterial. These materials help prevent the growth of mold and bacteria.

Vinyl or Epoxy Flooring: Select slip-resistant and easy-to-clean flooring materials to maintain hygiene and safety for users.

6. Clean Room Construction Units for Hospitals

Today, it is not difficult to find a unit that designs and constructs clean rooms. However, choosing a reputable unit that ensures quality design and construction requires thorough research.

Puritrak is a trusted clean room construction unit for many clients, featuring a standard air filtration system.

– Utilizes advanced air filtration technology, removing 99.97% of particles and ultra-fine bacteria as small as 0.3 microns.

– Flexible air filtration system, featuring both localized and centralized filtration, meeting clean room standards for all critical areas such as operating rooms, ICUs, and treatment areas.

– UV-C technology for disinfection, using specialized ultraviolet rays to effectively neutralize bacteria and viruses, reducing the risk of cross-contamination.

– Smart operation with automatic adjustments, minimizing manual intervention and optimizing processes, helping hospitals maintain a sterile environment efficiently while saving manpower.

See more: Puritrak Airsen AS488 air purifier

Clean room contruction for hospitals is an essential process that directly impacts the quality of healthcare and patient safety. Building a sterile space that is designed and constructed to standards not only prevents infections but also enhances the effectiveness of medical procedures.

Puritrak products and services:

• Puritrak air purifier
• Puritrak indoor air quality measuring device
• Puritrak outdoor air quality measuring device
• AQM solution

Contact info:

• Hotline: 0904.800.006
• Website: puritrak.com
• Email: Info@puritrak.vn
• Fanpage: Puritrak