There’s very little to whine about in the Philips AC3821/20 air purifier. The gadget includes great air cleaning capacities, comes outfitted with a HEPA channel that traps hurtful particles and a carbon channel that disposes of VOCs. Furthermore, there’s a humidifier highlight included too, which can prove to be useful during dry seasons. The gadget is estimated at Rs 37,995 on the organization’s authentic site and we would have not by any stretch of the imagination prescribed it at that cost as there are comparative alternatives accessible at a lower cost. Nonetheless, we saw that it retails for around Rs 22,999 on Amazon at the season of composing the audit, which makes it a tempting suggestion.


Philips has a scope of air purifiers that it offers crosswise over shifting value portions. We have the Philips Series 3000 AC3821/20 air purifier in for audit that highlights a Rs 37,995 sticker price on the organization’s authentic site however retails for around Rs 22,999 on Amazon. We tried the gadget during the Diwali season when the air quality was incredibly corrupted and proceeded with long haul testing into the summers. Will the air purifier have the option to battle the very poisonous air or will it surrender in these intense conditions? We discover.

Manufacture AND DESIGN

We infrequently go over any air purifier intended for Indian homes that don’t highlight a tough form and a utilitarian structure. The Philips AC3821/20 is no exemption. It sports a tough form with a tastefully satisfying plan, despite the fact that it takes after most box-type air purifiers. It sports adjusted corners and comes furnished with wheels that help move it around easily. The gadget sucks in air from the back through on a level plane running cuts and there’s a lock on its correct side, which is really a board to fill water in the event that one needs to utilize the humidification include.

The Philips AC3821/20 vents out cleaned air from the top. A board on the top highlights contact based controls to work the air purifier and there’s likewise a little showcase on the front. This showcase shows off different measurements relating to the air quality inside a room, for example, the current PM2.5 levels, which it gauges with the assistance of its sensors on the left side. The showcase additionally empowers clients to make sense of what conditions the air purifier is being worked at like if the humidification highlight is empowered, or whether the channel should be supplanted.


The Philips AC3821/20 air purifier comes outfitted with three separate channels that empower it to evacuate particulates and gases. It sports a pre-channel, which is trailed by a functioning carbon channel and a ‘Nano Protect’ channel, which is a term authored by Philips to depict a HEPA channel that traps PM2.5 and littler particulates. The pre-channel works by catching greater elements, which are for the most part PM10 and bigger particles. Hair strands, pet dander, and greater residue particles fall under this classification. We saw that in the wake of utilizing the air purifier for half a month, the pre-channel had assembled a lot of residues, showing that it was working rather well. So also, the HEPA channel turned grayish because of the amassing of caught particulate issue.

Next up are the dynamic carbon and the ‘Nano Protect’ HEPA channel that work couple to free the quality of littler particulates and glasses. The carbon channel includes a honeycomb structure and contains actuated carbon, which assimilates unsafe gases like benzene and formaldehyde that are typically delivered inside during the cooking procedure. Concerning the HEPA channel, the creased plan empowers catching of particles that are up to 0.3µm in size. What’s more, both the channels are said to keep going for around two years however that can change contingent upon the contamination of the territory where one uses the air purifier.


Most air purifiers pursue a similar basic standard of sucking in air from a bay, separating it all the while and discharging refined air from an outlet vent. The proficiency of the air purifier depends on a lot of different components like how well it can flow the air in a room if there are any holes or breaks from where non-sifted air is going around the channels and then some. How amazing the channels are with regards to catching hurtful particulates noticeable all around likewise influences an air purifier’s capacity to clean the air.

We tried the Philips AC3821/20 air purifier in such a way, that gives a precise thought of how well it performs. Our standard test involves running an air purifier in three distinct zones that have different air quality dimensions. Room 1 is a territory with extensively corrupted air quality as it is arranged in Delhi where outside air contamination levels are very high. This room has a region of 120 sq ft with roof tallness of 12 ft. Then again, Room 2 highlights air quality dimension running among poor and moderate. Its roof tallness and region are 12 ft and 140 sq ft individually. At long last, Room 3 is arranged in a generally cleaner territory with a lower measure of airborne particulates. Its roof tallness is 12 ft and it has a zone of 350 sq ft. Also, the Philips air purifier shows the current PM2.5 levels however we utilized our own air quality screen to discover how well the gadget performs. Do take note of that we recorded the fixation and not the weight of PM2.5, PM10 poisons, and these are referenced in µg/m3.

In room 1, the PM2.5 and PM10 levels were 92 and 112 µg/m3 individually before we started our standard 45 minutes of testing. Do take note of that the National Ambient Air Quality Standards have set reasonable PM2.5 and PM 10 levels at 60 µg/m3 and 100 µg/m3 (more than 24 hours). A sound person, when presented to contamination levels over the above-expressed dimensions, can create wellbeing complexities, over some stretch of time. Living in a region with high contamination levels, one could create sensitivities or even be under a high danger of creating lung as well as coronary intricacies because of elevated amounts of air poisons.

Returning to the tests, we let the air purifier keep running on its maximum speed setting for 45 minutes. We saw that after the test, it cut down PM2.5 levels to 24 and PM10 to 21. The general AQI (determined dependent on PM2.5 particles) was likewise brought from 169 down to 76, which falls in the moderate range on the AQI record. While not brilliant, the air purifier performed alright to improve the air.

In room 2, the air purifier began by attempting to sift through PM2.5 and PM10 levels that remained at 50 and 58 individually. While the contamination level wasn’t generally excessively high, an air purifier is as yet tried in these conditions since it is hard to as of now lower diminished toxin levels. After our standard 45 minute runtime, the PM2.5 and PM10 levels were both down to 10 and AQI improved from 136 to 42.

Going to room 3, which is one of the gathering rooms in our office, PM2.5 levels were at 72 and PM10 at 83 individually the AQI was at 159. Following 45 minutes, the dimensions PM2.5 and PM10 dropped down to 25 and 32 separately, while the AQI improved to 78. In this situation, the air purifier performed all around ok to get the contamination level leveled out.


While an air purifier’s essential capacity is to catch unsafe particulates noticeable all around, numerous organizations incorporate extra highlights to make the gadget a tempting purchase for customers. The Philips Series 3000 AC3821/20 air purifier comes furnished with a humidification highlight that empowers one to build the dampness in their room while getting the air cleansed. Humidification proves to be useful throughout the winter season and to help mitigate issues like dry skin or throat, broke lips. Humidification is additionally useful when one is experiencing influenza or cold however do take note of that over humidifying air can cause a few issues as well.

While the Philips AC3821/20 air purifier comes outfitted with a humidifier, the organization as of now offers independent gadgets for humidification. The majority of the organization’s items, including the purifier being tried, highlight NanoCloud innovation. This tech is said to empower the organization’s gadget to humidify air utilizing little water particles that are demonstrated to decrease the measure of microorganisms noticeable all around and not cause white spots or wet floor, which are some normal issues when utilizing an air humidifier.

The most widely recognized issue while utilizing a humidifier is that a fine fog of water is discharged noticeable all around, settles down around your home and dissipates to leave white spots. This is a typical event that can be maintained a strategic distance from by utilizing sifted water in the humidification procedure. Philips likewise encourages individuals to not utilize faucet water for humidification. We saw that the humidification procedure on the Philips air purifier functions admirably and as promoted, doesn’t cause white spots.

One ought to be aware of the humidification setting being utilized. Wrench it to the maximum and the room where humidification is going on will heat up by an extensive degree, notwithstanding during winter. This doesn’t really happen due to the gadget, however because of the way that air holds warmth better when the stickiness levels are high. By and large, the Philips AC3821/20 air purifier has amazing humidification abilities that make a decent item for your home when combined with great air cleansing capacities.


Most apparatuses are getting to be more brilliant nowadays with the Internet of Things (IoT) capacities. Notwithstanding, Philips went customary with its AC3821/20 air purifier as it doesn’t include IoT support or application similarity. The gadget’s touch-controls are set alongside the air outlet vent on its top edge. There’s a standard on/off switch, a kid lock that handicaps every other catch, air decontamination speed control, rest clock, auto mode, a change to diminish the presentation, one to set the mugginess level and one to change its activity modes.

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