In our science books, we have read that gulping in a few breaths of fresh air every morning makes us feel relaxed and sets the tone for the day to come.

Today, if you try it out in a city like Kolkata, Delhi, or Mumbai, you might have to ring 108 and schedule a hospital visit. It is not a joke but a fact.

A glance through the Air Quality Index statistics any day shows Indian cities occupying the top spots. If the outdoor air quality is terrible, the indoor air quality is worse.

If you forget to wipe the laptop or TV screen even for a day, you will find a thin layer of dust sticking to it. It should give you an idea of the amount of dust we breathe in daily. Hence, it becomes necessary to invest in an air purifier.

Different types of air purifiers are available on the market. If you do not know much about their functioning, purchasing the ideal machine for your home is impossible.

This buying guide explains the different air purifiers and the technology they use to help you identify the perfect appliance to suit your domestic needs.

Here are some of the best air purifiers available in India. Understand these features as they can help you to make the right choice.

1. Coway Professional Air Purifier, Special Green Anti-Virus True HEPA

Coway AirMega 150 is a high-quality True HEPA filter capable of trapping 99.97% of airborne pollutants and eliminating 99.99% of viruses and allergens. Among its peers, this Coway product has the thickest HEPA (25mm) filter to ensure a long life of up to 8500 hours.

The unique cartridge design allows you to remove the pre-filter without opening the front cover. It enables you to clean the pre-filter regularly. As all the filters are assembled on the front cover, this air purifier is most comfortable to maintain.

Another exciting aspect is the presence of a Pull Tag on the HEPA filter, as it lets you remove it by avoiding direct contact with virus and bacteria. The bundling together of the activated carbon and green HEPA filter makes it convenient to vacuum clean the activated carbon filter by holding the HEPA filter tag.

This product features a smart pollution sensor to represent indoor air quality in real-time through intuitive colors.

Coway provides quality after-sales service to its customers across India. The personalized and professional service makes Coway one of the most preferred air purifier brands in India.

2. Philips High-Efficiency Air Purifier AC2887, with Vitashield Intelligent Purification

The Philips Air Purifier is different from its contemporaries. It features three automatic purification settings comprising a general mode, an extra-sensitive allergen mode, and an extra-powerful bacteria and virus mode.

The exciting highlight of the Philips appliance is its healthy air protect alert feature, indicating when it is time to replace the filters. Besides, the machine stops working if you do not replace the filters. Thus, it ensures air purification at all times.

The VitaShield IPS technology features a NanoProtect filter and boasts a boosted clean air delivery rate of up to 344 cubic meters per hour.

This air purifier can remove ultra-fine particles as small as 20nm and eliminate harmful gases like formaldehyde, TVOC, and odor while removing up to 99.9% of bacteria.

The bacteria and virus mode makes this air purifier one of the most practical appliances to eliminate bacteria and viruses from the air. The mode boosts the airflow to enable the HEPA filter to capture up to 99.9% of bacteria.

The AreaSense technology accurately identifies fine particles smaller than PM2.5 and adjusts the purifier’s settings to the ideal level. The allergen mode uses AreaSense technology to reduce the risk level of allergens to the minimum.

This air purifier is amongst the most silent performers as it turns down its circulating fan speed and noise levels to allow a comfortable night’s sleep. One can dim or turn off the AQI and the UI light to avoid light disturbance for consumers.

3. Dyson Pure Cool Link Tower Wi-Fi Enabled Air Purifier, TP03

The Dyson Pure Cool Link air purifier removes 99.95% of particles as small as 0.1 microns while powerfully projecting and circulating purified air. This purifier uses Air Multiplier technology to ensure powerful air projection to ensure proper air circulation throughout the room.

Dyson purifiers are different from the others as they have a lower face velocity with a high-efficiency HEPA filter.

The other air purifiers have a high face velocity that forces air through the filters. It can also allow potential harmful ultrafine pollutants to escape back into the room. Dyson air purifier ensures that such pollutants as small as PM 0.1 stay trapped in the filters.

The 360-degree vacuum-sealed Glass HEPA filter removes indoor air pollutants, whereas the second layer of tris-coated activated carbon eliminates terrible odors.

This air purifier is one of the intelligent machines as it automatically monitors, reacts, purifies, and reports air quality data through the Dyson link app. The app also sends notifications when it is time to change filters.

The oscillation feature exhibited by this air purifier helps in uniform air circulation throughout the room.

4. Mi Air Purifier 3 with True HEPA Filter and Smart App Connectivity

Among other features, the Mi Air Purifier 3 comes equipped with an ultra-clear OLED display with touch control. This quiet and energy-efficient air purifier is compatible with a smartphone app that allows controlling of its operations.

The OLED touch display comes equipped with air quality indicators to make it easy for you to gauge indoor air quality. The 3-layer composite filtration with a true HEPA filter ensures a thorough filtration process.

This Mi Air Purifier boasts a fantastic CADR of 380 cubic meters per hour to deliver unmatched cleaning power. The 360-degree filtration process with a True HEPA filter eliminates up to 99.97% pollutants for particle sizes up to 0.3µm.

The smartphone app controlling feature makes it one of the most useful air purifiers to have in the room. The innovative design allows for consistent airflow as it delivers 6333 liters of clean air per minute. This Mi Air Purifier works beautifully with voice assistants, like Amazon Alexa and Google Assistant.

This energy-efficient air purifier does not make any noise as it allows you to breathe green and clean. The Low Purification sensor is a useful one as it alerts you when to change the filters.

5. Philips AC1215/20 Air purifier with 4-stage filtration

The Philips AC1215/20 air purifier is an ideal appliance to have in your bedroom as it automatically monitors and purifies the air with its professional-grade sensing performance.

The NightSense auto-mode ensures quality air delivery and constant monitoring while you sleep. This machine maintains pin-drop silence as it works diligently at night.

The VitaShield IPS, equipped with its aerodynamic design and NanoProtect Pro Filter, has a CADR of up to 270 cubic meters to remove ultra-fine particles as small as 0.02µm. Besides, it also filters harmful gases like formaldehyde and TVOC.

The extra-thick NanoProtect HEPA ensures superior purification efficiency and lifetime against airborne pollutants. The Auto Purification Mode helps detect PM2.5 level impurities and boosts the machine’s speed to deal with them.

The NightSense Mode is ideal for your bedroom as it monitors the air for sleep and quality to deliver clean air as you sleep. The dimmed lights and low sound ensure a better sleep experience for the family.

The Healthy Air Protect indicates when it is due to replace the filter. The appliance stops functioning when you do not replace the filters promptly.

The Child Lock feature prevents unintended changes in settings. The dashboard has a 4-step color ring display to indicate the level of air quality in your room.

Buying Guide For Air Purifier in India

Buying the ideal air purifier for your home is a conscious decision. Before deciding to go for the purchase, it is better to know your area’s air quality. The ideal way to do it is to enter your city’s name on this website,, to know the air quality.

Generally, there is higher air pollution in industrial areas and places where there is high construction activity. Under such circumstances, the air quality indoors is as bad as it is outdoors. Under such circumstances, you will need to invest in an air purifier.

The following scenarios should also make you think about whether to purchase an air purifier for your home.

  • Frequent sneezing or recurring bouts of seasonal allergies
  • Finding it difficult to breathe because of aggravated asthmatic conditions
  • Having pets in the household
  • Indulging in home renovation
  • Living in areas situated close to industrial units

Know the air purifier brands available in your area.

Though India’s indoor air quality is not up to international standards, there is not much acceptance for air purifiers in India. The lack of awareness might be the only reason for the same.

However, the younger generation is showing an inclination towards investing in air purifiers. Maybe, they do not have any other options left, especially when you consider air quality in Indian cities like Kolkata, New Delhi, and Mumbai.

It is better to know the features of some of the best air purifiers available in your country. We have discussed various air purifiers and their features here.

Some of India’s best brands include Coway, Dyson, Philips, Mi Air, Daikin, BlueStar, Honeywell, etc. While Philips, Dyson, etc., are top-rated brands, the Mi Air purifier is becoming popular today because of its aggressive pricing.

Choose the ideal filtration technology for your home.

Just as there are various kinds of pollutants, there are different air purifying technologies available to deal with them. Some of the commonly used filtering technology are as follows.

  • HEPA Filtration
  • Ionic Filtration
  • Carbon Filtration
  • Photocatalytic Filtration

Your air purifier can come equipped with any more or even more of these filtration technologies in its functioning. We shall discuss each filtration type in the course of this article. Before that, let us get accustomed to the Pre-filter concept.

You must have observed in water purifiers that you have a sediment filter outside the machine to trap large contaminants and enhance the other filter’s efficiency and longevity.

The pre-filter in an air purifier does a similar job. The pre-filter is the first filter layer placed ahead of the expensive layers to trap the large dust particles, pet hair, and the bigger microbes. Generally, the pre-filters are made of foam or nylon.

As these filters are washable, you can clean them comfortably. By trapping the heavier pollutants, these pre-filters make it easy for the other filters.

HEPA Filter

Of all the filters available on the market, the HEPA filter is the most expensive and important. These filters remove up to 99.97% of airborne pollutants, having sizes up to 0.3µm.

It can also remove allergens like pollen, fungi, pet dander, dust, mold spores, and even visible smoke.

If you want to know how small 0.3µm is, you should understand that the human hair’s diameter is between 50 and 100µm. Human visibility does not extend beyond 10µm.

You should exercise caution when shopping for air purifiers that claim to have HEPA filters. Many manufacturers use words like HEPA-like, HEPA-type, or HEPA-Style to describe their filters. Such filters are not HEPA filters because the right way to name HEPA filters is True-HEPA.

HEPA filters have to satisfy stringent standardization and need testing in independent laboratories. The cheap/spurious HEPA filters can be up to 600% less effective than True HEPA.

HEPA filters are classified into five categories ranging from A to E. The HEPA A filters are the least effective of all, but it the fundamental HEPA criteria. The E filters are the most efficient and can deal with radiological, chemical, and biological particles.

Such HEPA filters are used in gas masks used by the military and in chemical industries. These filters are also classified as Fire Resistant Type 1 or Type 2, depending on their combustion characteristics.

Ionic Filters

The ionic filters can capture ultra-fine particles as small as 0.1 microns. These filters work on the principle of emitting a cloud of charged ions that react with airborne pollutants.

These filters last long because it is possible to wash them regularly. Hence, they do not require frequent replacement. Though the replacement frequency is low, it can be challenging to clean these filters.

As these filters use static electricity, the dust particles stick inside the duct line. It remains glued to the surface and makes it difficult for anyone to clean them.

Activated Carbon Filters

You are acquainted with the function of activated carbon filters in your water purifiers. They are granular carbon pieces treated to be extremely porous. These filters use chemical adsorption technique to remove the pollutants.

Generally, activated carbon filters remove foul odors and hazardous impurities like volatile organic compounds, smoke, pesticides, herbicides, and smoke. You find almost all air purifiers, including activated carbon filters, in their lineup.

Photocatalytic Filters

Nowadays, you have photocatalytic filters in air purifiers and air conditioners. These filters comprise a catalyst, titanium dioxide, that gets energized on exposure to UV light.

When the UV light falls on titanium dioxide, it releases electrons to react with water molecules present in the environment and break them down into hydroxyl radicals.

The hydroxyl radicals come in contact with the organic pollutant molecules and tears into the chemical bonds to convert them to carbon dioxide and water.

However, these filters have a drawback because they produce ozone in small quantities. Ozone is a toxic pollutant and can be damaging to the environment. Besides, it can trigger asthma attacks.

Your room size is critical.

The bigger the room, the more is the quantity of air circulating inside it. Such spaces need bigger air purifiers. Some of the factors to check out when purchasing an air purifier are ACH and CADR. You can find these parameters in all air purifiers.

ACH – Air Changes Per Hour

ACH is a critical parameter as it indicates the number of times the air purifier can change the air within the room with fresh, clean air every hour.

Generally, ACH is expressed as 3x, 4x, etc. It indicates that the air purifier can exchange the air three times or four times per hour.

This factor is crucial if you have allergic and asthmatic patients at home. The higher the number, the better it is for them.

The manufacturers associate ACH with the maximum area that the air purifier can handle. If your air purifier comes with an ACH of 5x and certified to cover an area of 200 square feet, it entails that the purifier will not work as efficiently if you place it in a larger room.

CADR – Clean Air Delivery Rate

The Association of Home Appliance Manufacturers has introduced this rating to let customers know how well their air purifiers can clean the air in their rooms.

All air purifiers don’t need to include CADR on their specifications list. However, manufacturers registered with AHAM should indicate this rating.

The CADR indicates how law large a room the appliance can handle comfortably. India’s air purifier market is not much regulated, and hence, one cannot expect this rating to be 100% accurate in Indian conditions.

CADR measures three different types of air pollution, dust, tobacco smoke, and pollen. The CADR is generally displayed as a set of three numbers separated by a dash. The measurement can range anywhere between 10 and 450.

For example, if the rating is 225/200/210, it indicates that the CADR for dust, tobacco smoke, and pollen is 225, 200, and 210, respectively. The higher the number, the better the machine is to deal with the respective pollutant. If other parameters are equal, you can use the CADR to differentiate between two models.

Factors like noise, weight, and portability require consideration.

Air purifiers can be heavy pieces of equipment and hence prove difficult to carry from one room to another. If you plan to utilize the appliance in multiple rooms, it is advisable to go for lighter air purifiers.

You have purifiers coming equipped with castor wheels that allow easy portability.

Some air purifier models use fans to force at high speeds into the machine, whereas those working on photocatalytic or ionic filtration methods do not.

The air purifiers with fans can make a lot of sounds that can be disturbing at night. Hence, you find adjustments that help you to regulate the fan speed and reduce noise levels.

Consider maintenance and running costs.

Air purifiers remove dust and pollutants from the air to circulate pure air inside the room. The filters gather a lot of dust, and hence, require frequent cleaning and maintenance.

You can unplug the device and wipe the exteriors with a wet cloth. The pre-filters, too, require periodic cleaning.

The air purifiers with HEPA and activated carbon filters need to be replaced at regular intervals. These filters are expensive, and hence, you should factor in the running costs when selecting the ideal air purifiers for your home.

The ionic air purifiers are less costly than HEPA purifiers and do not require as much maintenance because they do not need frequent replacements.

On the power consumption front, air purifiers consume around 50 to 70 watts on average. Some of the premium brands offer eco-friendly air purifiers that consume approximately 20 watts. Hence, it would help if you considered these additional expenses when purchasing the ideal air purifier for your home.

Placing your air conditioner in the room is crucial.

Air purifiers using HEPA and activated carbon filters rely on fans to pull the polluted air inside the machine and circulate clean air inside the room.

Therefore, you should not place such devices behind your furniture items as it can hamper the airflow. The place should be around two to three feet from the wall in the room’s corner.

Ionic and photocatalytic air purifiers do not have fans as they emit ions and radiation in a 360-degree angle. Therefore, placing these machines near the wall defeats the purpose. These machines are better off set in the room’s center. If your room’s geography does not allow you to put these machines in the center, it is better to avoid purchasing them.

Points to Ponder

We have discussed the different types of air purifiers and their functioning. All air purifiers are not similar in their performance and working. One needs to ponder on facts like environmental consideration, etc.

It is advisable to avoid using ozone-based air purifiers.

Ozone is an environmental pollutant. Besides, it is harmful to humans as it can affect the eyes and respiratory systems. However, ozone can kill bacteria and viruses. That explains why air purifier manufacturers chose to build such machines.

Ozone air purifiers are ozone generators as they release ozone into the environment at regular intervals. These air purifiers are the least expensive in the market, but with the harm, they cause to humans, it is advisable to avoid purchasing them.

Think twice before purchasing air ionizers.

Air ionizers work by charging air particles to make the bacteria, viruses, and dust heavy and fall to the ground. They also stick to the walls and your beds. However, you should note that ionizers do not kill bacteria and viruses.

Therefore, they are present in the same room. Besides, it becomes challenging to clean these purifiers. As some ionizers release ozone, it is better to check out if the manufacturer mentions 0% ozone in the product specifications.

Fixing your indoor pollution can resolve matters.

The following tips can help reduce indoor pollution considerably.

  • It is advisable to have adequate ventilation in the kitchen because the primary source of indoor pollution is the kitchen. You can have an exhaust fan or a kitchen chimney to take care of the smoke and soot.
  • Smoking cigarettes inside the house pollute the indoor environment considerably. Similarly, burning incense sticks and using camphor can also increase indoor pollution levels.
  • Furniture, paints, and new mattresses emit dangerous fumes like formaldehyde. Hence, you should ensure proper ventilation in the house.
  • Using kerosene lamps and candles enhances the carbon content in indoor air and adds to the pollution levels. It is better to avoid their use.

Final thoughts

Though we cannot control outdoor pollution, we can do our best to contain indoor air contamination by following the tips discussed above. If the air pollution levels make it difficult for you to breathe, you should consider investing in an air purifier for your home.

The buying guide should make it easy for you to purchase the best air purifier for your home.

Last update on 2021-04-15 / Affiliate links / Images from Amazon Product Advertising API

Inline Feedbacks
View all comments