Fight indoor air pollution with a good quality air purifier

November 15, 2021

Whenever air quality outside drops or air pollution hits crisis levels, we start taking all the necessary steps to lessen the risk of pollution-related health problems. However, despite being aware of the hazards of breathing unclean air, we take little or no measures for controlling indoor air pollution. Investing in products like Air Purifier do help in neutralizing some of the threat posed by air pollution and reducing the risk of airborne transmissions.

What are the qualities of a good air purifier system?

Many people dismiss Air Purifiers outright as a marketing hype or just as a passing fad but in reality, these appliances do help in filtering the air you breathe inside your home. Different types of features available within air purifiers include,

  1. Filters
  2. Motor/Fan
  3. Sensors
  4. Housing

Prolonged exposure to air pollution indoors can manifest into long-term health consequences. Air purifiers help in reducing it to such an extent. If you care most about air purifier performance and cleaner air, make sure you have the following things checked.

Indoor Pollutants
Indoor Pollutants

1] Filters

Air purifiers usually consist of a filter. The filters can be made out of - paper, fiberglass, fiber, and mesh. Also, it can be either a HEPA filter (pleated mechanical filters that can remove up to 99.97 percent of airborne particles) or a non-HEPA filter. The former removes more particles from the air compared to one without a HEPA filter.

Hepa Filters
Hepa Filters

Also, it will capture particles like dust, smoke, and pollen, but not clear gases like VOCs (volatile organic compounds) or radon that might accumulate from paints or cleaning products in your room. In such cases, you will require an absorbent, like activated carbon. An air purifier with a carbon filter will also capture gases and volatile organic compounds (VOCs). Bear in mind, all filters need to be replaced regularly to maintain efficiency!

2] Motor/fan

The closed system of an air purifier for the home is equipped with a fan that sucks in and circulates air. When the air passes through the filter, pollutants and particles inside it get trapped and the clean air is pushed back out into the living space. Having said that, every purifier has a Clean Air Delivery Rate (CADR), room coverage, and Air Exchange Rate specification. All of these vary with the number and types of filters. You may install additional fans if clean air cannot reach corners blocked by objects like flower pots and dressers.

3] Sensors

An Air-purifying machine fitted with smart sensors can automatically detect pollution level & adjusts purifier speed accordingly. Also, it will provide information about the quality of the air in the room it’s placed under and send detailed reports directly to your smartphone app. You can then, easily monitor your indoor air quality.

Particulate Material
Particulate Material

Findings suggest conventional particle detection sensors have not reached sufficient performance to detect PM 2.5 particles with high accuracy. So, to increase the detection accuracy of PM 2.5 particles, it is important to fine-tune the sensitivity to finer-scale particles. Sensors that can detect microparticles as small as 0.5 μm in diameter are perfectly suited for your rooms and will address your indoor quality concerns.


After having covered parts of an Air Purifier in brief, let us find how this system differs from other air cleaning systems.

What is the difference between an air cleaner and an air purifier?

While Air cleaners aim to filter the air in your home and remove larger particles like pollen or dust,  Air purifiers are meant to sanitize the air. It eliminates airborne pathogens like viruses, mold, mildew, bacteria or compounds like Volatile Organic Compounds (VOCs) which Air Filters cannot. Moreover, Air Purifiers fitted with activated carbon filters are also effective in reducing odors.

How long does it take an air purifier to clean a room?

It depends upon the ACH rating of the purifier. Simply put, an ACH rating tells us how many times an air purifier filters all of the air in a given room during one hour. So, if an air purifying system has an ACH rating of 3 it means, the system cleans the room’s full volume of air 3 times which in turn indicates that it takes approximately 20 minutes to clean a room. However, it is important to mention here that such tests are performed in a controlled setting with brand-new, unused filters. As such, they don’t take into account real home conditions like objects nearby blocking airflow).

Where is the best place to put an air purifier?

The idea is to enjoy fresh air where you spend most of your time. So, you can place the air purifier either in your living room, bedroom, or any other place. Their portability also makes it easier to move them from room to room, if needed.

Hope that makes sense!

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Hemant Saxena
(374 Articles Published)

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