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11 Best Air Purifiers in India – 2021 [Expert Reviews]

When you scan any list featuring or discussing air pollution and/or its effects on the population, you’d be surprised that any world pollution list that you pick up, would feature a minimum of 3 Indian cities in the top 15 most air-polluted cities in the world. There may be outrage, and public interest happening on the issue, but the air pollution and its impact on the cities are real.

Since you are already looking for an air purifier, you already know that indoor air pollution is not a myth, but real, as real, and as impactful as it can get. To check that, we need an air purifier at the most urgent.

Air purifiers work by filtering and purifying the indoor air, by taking in the existing air, filtering it from bacteria, dust, etc, and releasing it. It deals with the removal of indoor pollutants like dust, smokes from outside, cleaning sprays, cooking gas, and refrigerators amongst a host of other air pollutants which can trigger allergies, cause respiratory distress.

Air purifiers in India are of 5 types- charcoal absorbent, mechanical filter, electrostatic and ionising filter, ozone filter, and ultraviolet filters. The most effective though is HEPA- a high-efficiency particulate air filter.

Best Air Purifiers in India (2021)

Air purifiers in India are easy to install, do not need additional or complicated setup or wiring, have low power consumption, consume minimal electricity and cause negligible noise. Therefore, the only price you pay for clean fresh air is the price of purchase.

The list of 11 best-rated air purifiers in India according to our pool of research are as follows:

1. Best Overall: TruSens Z-3000

  • Filter Type: Pre-filter, Carbon Filter, True HEPA Filter, UV Sterilization
  • Power: 68 Watts
  • CADR Rating: 200  m3/h
  • Coverage Area: 750 sq ft

The TruSens Z-3000, a new entrant to the market, is a state-of-the-art and unorthodox designed air purifier. What sets it apart and makes it one of the best air purifiers in India is its remote air quality monitor. It also comes equipped with a 360-degree air inlet and a spit air outlet. This design helps streamline and increases the efficiency of its purification.

The design of TruSens Z-3000 is distinctive. This cylindrical designed device has a uniform cross-section. It has a 45 degree angled top from the horizontal. The top air vent has been divided as a 30-70 ratio for air circulation. It also has a separate sensor pad, which can be placed across the room.

A very compact 263 x 263 x 726 mm dimensions, made up of high quality plastic in white and covered with silver mesh. It uses a 4 stage filtration process, where stage 1 is the pre-filter, then it has a core true HEPA filter, which is capable of removing 99.97% airborne particles. The third is the activated carbon filter from DuPont and UV sterilisation.

It is an extremely easy to use device which because of the angled top is easily visible. The controls here are quicker to manage. The semi-circular LED shows the air control panel. The LED is backlit and auto dims in sleep mode. It has buttons like power on/off, fan speed, dimmer, timer, UV and reset.

The coverage of this air purifier is high. It can cover a room of 750 square feet, or 75 square meter, which is one of the highest coverage we have seen. It has an ACH of 2, whereas the CADR is 200 cfm. At its maximum room area, it provides two room changes an hour, and at a smaller area, it provides 4 changes an hour.

The higher airspeed attributes for its noise level to be at 66 decibel, therefore it is slightly more noisy than the others. It is one of the most. At low speed though, it is noiseless at 32 db. This is an ideal device for homes, for larger rooms, and for small offices as well.

Weighing a lightweight at 6 kgs and it has a warranty of 2 years. It consumes 68 Watt power at most and is a green device.

Therefore, if you are looking for the best air purifier in India which is sleek, compact and uses HEPA and has unorthodox and compact looks, this is your device.

Pros
Pros
  • Sensor pad is advanced
  • True HEPA filter
  • Unorthodox and sleek design
  • Modern dual air flow
  • Easy to control display
Cons
Cons
  • Can get noisy at highest speed level
  • Power consumption could have been lower

2. Best Runner Up: AGARO 33329

  • Filter Type: Pre-filter, Carbon Filter, True HEPA Filter, UV Sterilization
  • Power: 45 Watts
  • CADR Rating: 260 m3/h
  • Coverage Area: 645 sq ft

If you are looking for the best air purifier in India, which isn’t very expensive and has good coverage, and is capable of no germs, only fresh air while filtering through HEPA, it has a 3D air filter, Anion Releasing, then AGARO 33329 Pure-Wave is the choice to make.

This is a compact and sleek model, which is made of high-quality durable plastic, has a control panel on the top, which is LED-based, along with the mesh for airflow. At a dimension of 330 mm x 510 mm x 170 mm, it is sleek. It uses the Anti-bacterial filter, HEPA filter, UV-based filter, and Anion purification.

The HEPA and Anion purification remove most of 99.97% of germs and promote good health through Anions. The use of the activated carbon pre-filter helps in absorbing VOCs/Gases/Odors and traps larger particles.

It is extremely easy to use, it has a digital touch display that shows real-time air quality, temperature, and child lock. It has 3 airflow modes which have good airspeed. This can be controlled with remote control. The ease of use is facilitated by an auto mode and a sleep mode. The display is color changeable as per the quality of air in the room.

This has a high coverage area of 645 sq ft or 64.5 sq m, with a CADR of 260 m3/h. The clean air delivery rate is higher than average, which means that it gives nearly 4 air turnover per hour. It has a 3D airflow, which helps the air to flow well and thoroughly.

This is an ideal product for homes where the room size is in its coverage area, it is capable of refreshing your rooms within 10 mins, also, it has a carbon filter which helps eliminate any odor from cooking as well,  therefore, it is good for households which have pets or open plans.

The weight of 5.58 kgs along with a warranty of 1 year makes it one of the lightweight models to have. The noise levels are low and at sleep mode, it is nearly noiseless.

Therefore, in the price range of under 10k, this is one of the best budget air purifiers to have. They give excellent air quality and are easy to navigate and control.

Pros
Pros
  • 7 filtration process
  • Indicators which signify quality
  • Remote controlled
  • Budget friendly
  • High CADR
Cons
Cons
  • The range of the remote it low
  • The design is a bit bulky

3. Best Build Quality: Mi Air Purifier 3

  • Filter Type: HEPA Class 13 filter
  • Power: 38 Watts
  • CADR: 380 m3/h
  • Coverage area: 484 sq ft

If you are looking for an affordable, yet accurate and efficient way to purify your ambient AQI, especially when the pollution in your area is high, then the one of the most efficient air purifiers which does an efficient job is Mi Air Purifier 3.

The design is a trademark Mi Air Purifier design which it carries forward from its other models. A tall and slim box, it is minimalist in design, in matte white colour. Top grill has a circular cut square design, it has an OLED touch panel, along with a perforated grill along the body. The dimensions are 240 x 240 x 520 mm.

Comes with a true HEPA 13 filter which filters 99.97% particles up to 0.3 micron. The three layer filtration process includes activated charcoal, which removes and reduces odor. It is a user-friendly and easy to use device, which is also smart. It can integrate well with any of the smart home ecosystems. Not only can one control the levels, but also schedule and work with audio smart systems.

Thanks to the new and improved centrifugal fan, Mi Pure Air 3 delivers a CADR of 380 m3/h, which is by far one of the highest. It is good enough to cover a 405 sq ft area and can purify the air in 15 minutes. At full level it definitely is noisy though.

The air in polluted cities is poor and it grossly affects the health of most. Therefore, anyone having smaller to medium rooms, living in areas with PM 2.5 quite high, needing smart integration should prefer this. The weight of this device is under 5kg at 4.8 kg and comes with a warranty of 1 year.

The filtration capacity is quite well structured and delivers good results. It is not perfect, it has higher filter replacement costs, but it is smart, it is minimalistic in design and good buy.

Pros
Pros
  • High CADR
  • Smart enabled
  • Minimal Noise
  • Minimalist design
  • Energy efficient
Cons
Cons
  • High filter cost
  • Slower purification

4. Best for Ease of Use: Blue Star BS-AP490LAN

  • Filter Type: True HEPA and Formaldehyde removal, Cold Catalyst filters
  • Power: 88 watts
  • CADR: 318 m3/h
  • Coverage: 800 sq ft

When the pollution starts getting better for you and a basic air purifier is not what you need, then this advanced Blue Star BS-AP490LAN air purifier is by far the best mid segment air purifier in India. Featuring a 7 stage air purification process, the results obtained by this is fantastic and bested by few.

This is an ergonomically designed air purifier that has a wide base and a curved narrow top. It is made up of plastic or a white plastic enclosure, which is equipped with a black control panel on top. The dimensions of this product are 195 x 370 x 650 mm, which makes it a little larger than most modern devices, but still compact enough for rooms.

It uses a 7 stage filtration process by which it purifies the air. The usage of High-Efficiency Particulate Arresting (HEPA) filter technology along with using the relatively uncommon cold catalyst filters and formaldehyde-removing filters, it filters most allergens across microbiological, chemical, and physical. The air filtration rate of 99.97% with removing allergens up to 0.3 microns makes it by far superior than most in this class.

It is fairly simple and efficient to use. Easy-to-use buttons, which are also touch-sensitive are the way to control it, it also comes with remote control. The SensAir technology automatically does most of the task itself. The built-in 2.5 PM sensor helps guide the filtration process.

With a coverage area of 490 sq ft and a CADR of 318 m3/h, this is an ideal device for smaller areas. The Clean Air Delivery Rate is high enough to enable clean and pure air in under 10 minutes. It has a 3 stage LED detector and a filter change indicator, which help add efficiency to the CADR.

This is a device that has a child lock, timer, sleep mode, making it ideal for families with kids and smaller areas. This is easy to use and can be stored anywhere, therefore people in high pollution cities should consider it.

The weight of this product is at 8 kgs, it has a 1 year warranty from date of purchase. The noise is fairly low and negligible in sleep mode.

With additional features like a Master Light Sensing technology, live PM 2.5 indicator, live odor indicator, this is a very good buy with fantastic purification results.

Pros
Pros
  • Master Light Sensing Technology
  • PM 2.5 indicator
  • 7 stage purification process
  • Intuitive control panel
  • SensAir technology
Cons
Cons
  • Poor after sales service has been reported
  • Remote has a low sensor

5. Best Tower Air Purifier: Dyson TP04

  • Filter Type: Glass HEPA Filter, Tris Impregnated Activated Carbon Filter
  • Power: 40 watts
  • POLAR: 361 l/s airflow max
  • Coverage: 600 sq ft

In a world full of android phones, an Apple is still an Apple product, similarly, in a market full of air purifiers, Dyson TP04 has a separate niche, which is credited to its elegant and ergonomic aesthetics, its sophisticated technology and unique features. Despite being one of the most expensive products, Dyson Pure Cool Air Purifiers stand out.

The designing aesthetics is very modern, very cutting edge. Despite its fragile and streamlined looks, it is constructed with an unbreakable and high quality ABS material, a perpendicular design, it has a cylindrical base above the power button and has a colourful LCD panel. It has a magnetised remote controller which can be placed on the air purifier when not in use. It has a dimension of 206 x 223 x 1054 mm.

It has 360 degree filters which are very effective. The primary filtration is done through pleated Glass HEPA filter made of Borosilicate and a grade 13 HEPA filter which absorbs allergens as small as 0.1 microns. The carbon filter here is also very dense and thicker than other brands in the market, absorbing odor and VOC maximum.

This is an extremely easy to use device, which can be paired with the Wi-Fi and Mobile App. The app shows the Air Quality Index and helps you adjust the same to your convenience. The app also helps you track the previous graphs and create a weekly schedule. It has 10 different levels, auto mode.

When we talk about coverage, this has a unique 350 degree oscillation which throws air in all areas and can be customised as 45, 90, 180 and 350 degree oscillation. Dyson uses the POLAR method as opposed to CADR. The results are more than satisfactory and border on excellent even in a large room. The device can change air quality from extremely poor to excellent in under 30 minutes, which is fantastic.

If you live in a city which is highly polluted and has an extremely high PM 2.5 and PM 10 levels or suffer from any respiratory distress, this is the device for you.

This weighs just under 1 kg and has a warranty of 2 years, making it an extremely desirable device.

The design, the wi-fi connectivity, the real-time AQI along with a host of other features make paying a large sum for it warranted if you live in a highly polluted area.

Pros
Pros
  • Highly durable
  • 350 degree oscillation
  • Most advanced filtration process
  • Wi-Fi and App connectivity
  • Diffused air for colder climate
Cons
Cons
  • Expensive product
  • Adapter slightly large

6. Best Under Budget: Mi Air Purifier 2C

  • Filter Type: True HEPA
  • Power: 33 watts
  • CADR: 350 m3/h
  • Coverage: 452 sq ft

This mobile telephone giant made a foray in lifestyle electronics with a bang. The Mi Air Purifier 2C is the budget version for the best air purifier in India. With a true HEPA filter, which features a real time air quality indicator, dual filtration along with 360 degree air inflow. It is an ideal air purification beast in the budget range.

This is a white colour, plastic body, sophisticated design air purifier. The fan is located on the top  of the air purifier, whereas it has the filter located at the bottom. This is a fuss free, minimalistic and elegant look. The dimensions of this product are 240 x 240 x 520 mm. This model Mi Air Purifier 2C uses a 2 layer filtration process and has a 360 degree air inflow. This filtration process captures allergens to a size of 0.3 microns.  True HEPA technology makes it 99.97% purification.

It is easy to install and use. It has a power button on top and OLED indicator on the body for when it is on or off and the readings. It has an infrared sensor, which detects the level of pollution in the air surrounding it and thus filters as per it. The filter change process is extremely simple and can be done in 10 seconds.

The coverage area of MI Air Purifier 2C is 452 sq ft. That is a comparatively smaller coverage area than most others that we normally test. Though, surprisingly it has a higher CADR rating of 350 m3/h, which means it can purify a room in about 10 mins, which is a big deal.

It is meant for small rooms and places which have a high pollution rate, enabling it to give a fast clean air delivery. Buying multiple units for placing in two rooms can be a cheaper alternative to some more advanced purifiers.

The weight of this product is 4.1 kgs and the warranty for this is 1 year from the date of purchase. At a noise decibel of 28, this is one of the quieter models available.

Pros
Pros
  • True HEPA filtration
  • Excellent CADR
  • DIY Filter change
  • Fuss free and simple operations
  • Budget friendly
Cons
Cons
  • Ineffective in larger rooms
  • No night or sleep mode

7. Best with Dual Purification: Sharp FP-J80M-H

  • Filter Type: H14 HEPA Filter, PlasmaCluster Technology
  • Power: 48 Watts
  • CADR: 480 m3/hr
  • Coverage Area: 680 sq ft

The USP of Sharp Purifiers is that they are equipped with dual technologies, that is, they have both PlasmaCluster Technology and Passive Filtration technology. The PlasmaCluster Technology is a highly acclaimed technology for its safety and effectiveness. Coupled with an H14 HEPA Filter and Active Carbon Filter, they are the one of the best air purifier in India.

This Japanese designed air purifier is elegantly designed. Entirely in Black, this is an air purifier which can easily blend in the interiors. It has a control panel on the top, which controls most of the functions. The dimensions of 416 x 720 x 292 mm makes it sleek and smart.

It has 3 filters which does passive filtration of the air. It has a PM 10 washable mesh filter, an activated carbon deodorising filter and an electrostatic HEPA filter. Along with this they have the advanced and pioneered PlasmaCluster Technology. In this positive and negative ions are released which remove the germs in the air. This is also a hydrating technology as the microorganism disintegrates into water.

The Sharp air purifier has 7 modes of operations. Pollen, haze, auto, max, medium, low, sleep. This device has automatic sensors which analyse and filter the air, it has a touch panel which is sensitive to light. It turns on and off as per the ambient lighting. It has an auto-restart function as well.

This Sharp Air Purifier has one of the Clean Air Distribution Rate (CADR) as compared to others. Coupled with a 20 degree air flow, filtered pure air reaches all the hard to reach areas of the room. The coverage area of 620 sq ft is also good for it to be able to purify the air in a medium to large room. It purifies air upto 99.97% for microns upto 0.3.

This is a fantastic model for those who suffer from respiratory distress, have multiple pets at home, suffer from dry air from other purifiers, for smokers and other pollutants which are extremely high in volume. The poorer the AQI, the more effective this air purifier gets.

This high-tech air purifier weighs a hefty 11 kgs, which is considering it packs a lot of technology. The warranty this comes with is a standard 1 year warranty.

A Japanese air purifier, which has best in class features, is highly efficient, has large CADR and coverage area with cutting edge technology, there is little to not like about this purifier.

Pros
Pros
  • PlasmaCluster Technology
  • CADR and Coverage Area high
  • 7 modes of operations
  • Hydrating air purifier
  • 2 year life for filters
Cons
Cons
  • Weighs heavy at 11 kg
  • Expensive product.

8. Best with Remote Control: Havells Freshia

  • Filter Type: True HEPA, 5 layer filtration process
  • Power: 80 watts
  • CADR: 350 m3/h
  • Coverage Area: 755 sq ft

Havells India Ltd is one of the leading Indian brands in the electronic niche. They have been pioneering electronic technology that best suit Indian requirements. The offering of Havells Freshia AP-40 air purifier is a true HEPA purifier, which doesn’t emit harmful gasses like Ozone.

This is an elegantly designed air purifier which is white in colour. Made of plastic, this is also durable. It has a small perforated mesh at the lower end. Whereas there is an angled control panel which is touch sensitive and operates the air purifier. The dimensions of this is 425 x 260 x 720 mm. This uses 5 filtration processes, including the Pre-Filter Cold Catalyst Activated Carbon Antibacterial along with HEPA Technology.

This is a remote controlled air purifier which has a touch screen for further controls. The LED is a colour indicator which goes green when the air quality is good, orange when it is moderate, and red when the air quality index is poor. The air purifier is good at alleviating the odor in any household from kitchen, to pets to others.

The coverage area of this is 755 sq ft, which is quite large. This coupled with a high Clean Air Delivery Rate of 350 m3/h means that a medium to large room will get clean and pure air all around. The volume of purified air per high is enough for it to be able to provide faster air purification.

This air purifier is the preferred choice of the best air purifier in India for large rooms, small offices, or multiple small areas which are  interconnected. This is also equipped with a lot of safety control features namely, auto mode, sleep mode, child lock, manual timer settings, dust sensor, filter replacement reminder. Therefore, it is good for families and small work spaces.

This is an air purifier which is slightly heavier at 9.1 kg. This is a good investment which comes with a warranty of 2 years.

Having said that, it is an ideal machine which is developed in India, purifies upto 99.97% allergens upto 0.3 microns and have a large coverage area with a high CADR.

Pros
Pros
  • Coverage area expansive
  • High CADR
  • True HEPA Filter
  • 2 year warranty
  • Indian Brand
Cons
Cons
  • Higher Power consumption
  • Not as noiseless as it claims

9. Best Portable Air Purifier: Coway AP 1019C

  • Filter Type: Patented Urethane Carbon Filter, Green HEPA Filter
  • Power: 38 watts
  • CADR: 303 m3/h
  • Coverage Area: 355 sq ft

Coway is a leading Korean brand for electronics and this is one of their most popular models. It is a brand which has been awarded with the coveted Reddot Design Award for air purifier. The Coway AP-1019C is a silent air purifier which is a low cost model from this most coveted brand. Coway brand has probably the largest Research and Development center in the world.

It is a compact and small device which is extremely simplistic in its looks. The design is more of a ventilated rack with perforated body all over and white in colour. It has a LED indicator which indicates the Air Quality Index.

The dimensions of this product are- 415 x 245 x 525 mm. This air purifier uses a unique and patented filtration process of the Urethane Carbon FIlter. It traps Bad Odor, Formaldehyde, VOCs and Cigarette Smoke far better than other filters.

It has 3 filtration processes, with a green HEPA 13. This is made of Gingko and Japanese Sumac and therefore gives 99.99% protection against viruses, allergens and PM 2.5.

It is an extremely easy to use device. It has a unique Coway specific design where the pre-filter can be removed without opening the device and exposing it to the other filtered viruses and allergens. It also has a pull tag for the HEPA filter to avoid contact with viruses. It has a night mode, a mood AQI indicator. It has a touch sensitive control panel.

It has a CADR of 303 m3/h which when coupled with the coverage area is ideal for small areas and bedrooms. They do a thorough purifying of the air and also have a turbo mode which can purify the area fast and effectively.

In case you reside in an area of high pollution and a situation where air borne viruses and diseases are high, then this is the air purifier of choice.

The weight of the device is 7.1kg and the warranty is an astounding 5 years and 2 years on the motor. This calls for it to be a sound investment.

This may look small, but is a powerful air purifier, which does the job thoroughly and is a good buy for smaller areas. There may be more feature packed devices in this range, but none that can match the cleaning for this Coway Professional Air Purifier.

Pros
Pros
  • The patented Urethane carbon filter
  • Green HEPA 13
  • Small and simple design
  • Low power consumption
  • Warranty
Cons
Cons
  • Not high on additional features
  • Coverage area restricted

10. Best Premium Looking: KENT Aura

  • Filter Type: HEPA
  • Power: 45 watt
  • CADR: 180 m3/h
  • Coverage Area: 290 sq ft

This is a newage brand to jump into the air purifier brandwagon. It has a vast experience in water purification, which it is bringing to the fore with KENT Aura. This is a budget, entry level air purifier, which aims at providing innovation and customer satisfaction.

This has a very typical design, which is similar to most other brands in this range. It has a white plastic body which is printed in blue floral designs. It is a pedestal based design and not a wall mountable design.

The dimensions of this air purifier are- 350 x180 x 482 mm. This air purifier uses a 4 stage filtration process, which primarily filters with HEPA filters and has ionisation at the end. The activated carbon filter and HEPA filter remove 99.97% of odor and allergens, especially those upto 0.3 microns.

The ionisers release negatively charged particles in the air, which not only helps freshen the air but also has claims that negative ions alleviate mood and treat depression. There are reports though which say that this ionization process releases ozone, which is harmful.

This has a button control panel on the top whereby you can control the fan speed, set a timer, have a filter replacement, child lock, and a changing colour indicator where blue is excellent, pink is good and red is poor.

The CADR of this Kent Air Purifier is 180 m3/h, while the coverage area is 270 sq ft. This is quite a limited range, but for an entry level air purifier, this is sufficient. As compared to others in this segment, Kent being an Indian company is a leader.

It is an air purifier designed for small rooms and households in highly polluted areas who crave for fresh air, but are unable to afford it. This entry level air purifier is good enough to filter air for a household.

The weight of this air purifier is 5 kg and the warranty offered by this is a 1 year warranty.

Therefore, if you are looking for an entry level air purifier, then as compared to others international brands in this range, it is a good choice to first consider this Indian brand.

Pros
Pros
  • Ionisation
  • True HEPA
  • Low power consumption
  • Color changing indicator
  • Indian brand
Cons
Cons
  • Can get noisy
  • Has been reported to release ozone

11. Cheapest Option: Philips AC0820/20

  • Filter Type: 3 filtration process
  • Power: 22 Watt
  • CADR: 190 m3/h
  • Coverage Area: 190 sw ft

Philips is one of the most renowned brands for air purifiers. The newest entry is the Philips AC0820/20 air purifier. It is a uniquely designed model which makes it one of the most sought after entry level air purifiers.

What makes it one of the best air purifiers in India is the cylindrical design which is uncommon from others. The shape is designed as such to suck the maximum air from the atmosphere. The design creates a 360 degree air suction courtesy of a jet engine shaped powerful fan. Therefore there is no obstruction in the airflow path. The dimensions of the air purifier is 250 x 250 x 367mm.

This is a one touch button device. This has an intelligent air purification set up. Where it adjusts the fan speed as per its own detection. There are three operational modes- auto, turbo and sleep mode. The noise level is a moderate noise at 25-68 decibel.

The Philips AC0820 is for smaller rooms only. It has a coverage area of 190 sq ft and a CADR of 190 m3/h. This is designed only for small rooms.

The real time air quality indicator has an additional LED circular ring, This detects the change from red to purple to blue as per the air quality. This device weighs 3 kg and has a warranty of 2 years.

Therefore, this is one of the best devices in the entry level range, but shelling out a little more, you could get a true HEPA and better coverage area.

Pros
Pros
  • Reasonable priced
  • USP design
  • 360 degree airflow
  • Good purification
Cons
Cons
  • Low coverage area
  • Not true HEPA

Frequently Asked Questions

What to consider before buying an air purifier?

The salient factors must be taken into account before you make the purchase of the best air purifier in India.

1. The size of the room
2. The filtration type
3. Clear air delivery rate
4. Replacement cost of filter
5. Cost of the device
6. Noise
7. Number of Filters
8. Child Lock

Which is the ideal place for an air purifier?

It is the most ideal to place the air purifier in the room you must spend time in. It is an incorrect notion to place it in the room which gets air ventilation most. Air purifiers are for your benefit, so place them in the room you spend most or in the bedroom if you suffer from respiratory distress.

What is the maximum time for which an air purifier should run for?

It is ideal to run it the entire time you are occupying the room it is in. The modes and fan speed must be altered as per the change in air quality and the noise tolerance levels. But switching on and off the air purifier is discouraged.

How loud are air purifiers?

While we have provided the noise of every air purifier brand in decibel values, in real sense it is not very loud. The noise gets amplified at the highest fan speed, but that depends on the noise tolerance level of self.

How long does it take for the air purifier to purify the room?

While the CADR for different models differ from the other, the rate at which air is purified is dependent on the Clean Air Delivery Rate. So one air purifier with a higher rating cleans it faster and vice versa. Having said that, on an average, it can take anytime between 15-30 mins.

Verdict

Air purifiers are fast becoming more important than earlier. With rising pollution levels, clean air is becoming the need of the hour to fight acute respiratory conditions arising from polluted air.