Air Purifier

Air Purifier

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The pollution level in our atmosphere has increased at an alarming rate and continues to increase even further, which brings the focus on the Air Purifier. Smaller cities and villages are relatively less polluted but the medium and higher-level cities have become very heavily polluted. This pollution is high not only on the outdoors like roads etc but also indoor in your house. In fact, sometimes the indoor may become more polluted if the air circulation is not very good and the pollutants are not cleared off.

Many air conditioning systems have their in-built air purifications but they are generally at a basic level only. To counter the rising pollution and protect your home, it is now becoming necessary to install a proper air purifier. It is a must if your area has a high pollution level and you want to protect the health of your family members.

We will not go into the detailed causes of this air pollution, but the main causes are vehicular pollution, industrial pollution, coal power plants, crop burning by farmers or seasonal effects like Diwali crackers.

While it is not entirely possible for an individual to control the pollution in your city or town, but you can take a pro-active approach, by installing an air purifier, and make at least your home safe for the family members.

What is Air Purifier

Air purifier is a specialist device that purifies the air in a confined room or area. A good purifier can clean about 99.7% of the pollutants from the air. This will help to reduce health effects like asthma, breathing or respiratory problems, allergies etc. It can remove PM10, PM2.5, PM1.0 and other such particles and make air healthy and improve your health.

air purifier

What pollutants can air purifier remove

  • PM10, PM2.5, PM1.0
  • Dust particles
  • Pollen
  • Pet hairs
  • Cooking smoke
  • Plant spores
  • General toxins like pesticides spray
  • Paint fumes and other such chemical fumes
  • Fungi, bacteria and virus
  • Cigarette smoke
air purifier

Air purifier stages

  • Pre-Filter: Blocks or cleans the larger size dust particles and prevents HEPA filter from getting dirty too soon. This filter can generally be washed easily.
  • HEPA Filter: High-Efficiency Particulate Air Filter, main filter which removes smaller particles like PM2.5 etc.
  • Carbon activated filter: Removes odour.
  • UV lamp: Removes germs and micro-organisms.
  • Ionizer: they generate charges molecules which will stick to the pollutants and cause them to settle down on the floor.
  • Ozone generators: work almost like the ionizers but ozone is not considered very safe for health or for the environment.

These are the main 5 stages of air purification. Depending on the model of the purifier, it may have some or all of the above stages. Any good purifier should have at least pre-filter, HEPA and carbon filter for good air purification.

How to choose the correct capacity of air purifier for a room

First thing to consider is the room size. Measure and calculate the volume of the room from length, breadth and height. A good purifier should be able to recycle the air volume of the room 4 times in 1 hour. In other words, the capacity per hour of the purifier should be about 4 times the room volume. You should choose an air purifier with slightly higher capacity so that you can run it at low power and have a noise-free and low power operation. Generally, capacity and suitable room sizes are mentioned in the product description of the air purifiers.

Maintenance of air purifier

Generally, the filter needs to be changed in about 9-12 months’ time, to maintain good performance. Some purifiers have a built-in alert function which will give an indication about filter change. These filters typically cost about INR 1500-2000 and can be easily changed.

Factors to consider before buying an air purifier

  • Types and number of stages: Should have at least pre-filter, HEPA and carbon filter for good air purification.
  • Particle size of filter like 0.1 microns etc.
  • Capacity (CADR) should be suitable for your room size.
  • Price should suit your budget, also consider the periodic filter replacement cost.
  • Wattage: Lower the power better it is for a given capacity.
  • Noise level.
  • Certifying Authority like AHAM, Airmid, ECARF.
  • Filter cost and replacement interval.
  • Other features like night and other modes.
  • Room air quality indicator.


Some of the leading brands which marketing their air purifiers are Dyson, Kent, Philips, Xiaomi, Honeywell, LG, etc. A good air purifier would cost around INR 10,000 – 15,000. Some latest models may be more expensive due to extra features.

Air Purifier
Air Purifier
Air Purifier
Air Purifier
Air Purifier Air Purifier
Make Philips Kent Philips Coway AlliedBluestar
Model AC1215 Aura AC2887 AP-1009 7 stage444 CMH
Price 9,799 5,999 16,948 15,490 10,9507,499
Capacity m3/h 270 180 333 303 300200
Power 50W 45W 60W 38W 45W43W
Pre-filter Yes Yes Yes Yes Yes Yes
HEPA Yes Yes Yes Yes Yes Yes
Carbon Filter Yes Yes Yes Yes Yes Yes
Ionizer No Yes No No Yes No
UV No No No No Yes No
Display Indicator Indicator LED Indicator LED Indicator
Filter Cost 4,000 3,000 4,000 4,500 3,0003,000

We are recommending some best models here, with a comparison table. Prices mentioned are just approximation because they keep changing from time to time. Click on the product image to check the best price at that time and you can even place an order online.

Check out other models of air purifiers here.

Read also our other articles: Best Refrigerators, Best Microwave, Best Beard Trimmers, Best Smart-watch

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