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The main job of an air purifier is to clean the air in a room as quickly and effectively as possible. To test this, we tried to recreate conditions similar to a highly polluted city. We lit camphor and an incense stick in a closed (but not fully sealed) room, which raised the PM2.5 levels to around 350 ppm.
From there, we measured the PM2.5 level every 15 minutes for an hour—or until the air quality dropped to a much safer level of under 35 ppm. We also observed how the purifier’s fan speed adjusted on auto mode, noting the PM2.5 levels at which it increased or decreased.Beyond performance, we tested the purifier’s other features: different modes, filter type, ease of filter replacement, filter life, price, and overall user-friendliness. Taking all these factors into account, we arrived at our final recommendation.
Top 10 air purifier in india 2025
1. Mi Smart Air Purifier 4 Lite
According to the manufacturer, the Mi 4 Lite comes with a particulate CADR of 360 m³/hr and a formaldehyde CADR of 120 m³/hr, making it suitable for rooms up to 412 sq. ft. In our tests, we used it in a 250 sq. ft room, and it managed to bring down PM2.5 levels to just 18 within an hour. Even in a larger 450 sq. ft space, it reduced the PM2.5 level to 35 in the same time frame—which is still very impressive.
One of the highlights is its filter system. The Mi 4 Lite uses a cylindrical composite filter that combines a pre-filter, an activated carbon filter, and a HEPA filter (though the grade isn’t specified). Because it’s cylindrical, the purifier pulls in air from all sides and releases clean air through the top vent. This 360-degree airflow design likely explains why it performs faster than many alternatives in the same range.
Another feature we appreciated is the display. Unlike most purifiers at this price point, which only show air quality through colored LED rings (often not very accurate), the Mi 4 Lite actually displays the real-time PM2.5 level. The only limitation is that the display caps at 600 ppm, but it’s still far more informative than just a color indicator.
The Philips AC1215/20 is one of the most popular budget air purifiers in India. With a CADR of 270 m³/hr, it’s designed to cover spaces of up to 250 sq. ft—making it suitable for bedrooms or small living areas.
The purifier uses a three-layer filtration system: a pre-filter, a sturdy activated carbon filter, and a true HEPA filter (though the exact grade isn’t specified). The carbon filter helps absorb VOCs, formaldehyde, and household odors, while the HEPA filter effectively captures fine dust, pet dander, and particles as small as 0.3 microns.
Where we felt a little disappointed was in its performance in auto mode. The fan only ramps up when PM2.5 levels rise above 250 ppm, and it kicks into the next stage only when pollution levels cross 500 ppm. That’s far from ideal for a country like India, where levels often fluctuate in the 100–200 range indoors.
Even more concerning is the LED ring indicator. It turns blue (signaling “good air quality”) even when PM2.5 levels are as high as 250 ppm. This suggests that the air quality sensor isn’t very precise, which can be misleading if you rely solely on the display.
Overall, while the Philips AC1215/20 offers decent filtration, its weak auto mode and inaccurate sensor limit its effectiveness.
3. Dyson Cool Air Purifier TP 07
The Dyson TP07 is the most premium air purifier on our list, priced at over ₹40,000. Unlike most brands, Dyson doesn’t disclose a CADR value. Instead, it uses its own “Polar Test” method, based on which the TP07 is recommended for rooms up to 600 sq. ft.
Like the Mi purifier, the Dyson TP07 comes with a cylindrical composite filter—this includes an activated carbon layer and a Grade 13 HEPA filter. Thanks to its 360° design, it pulls in air from all sides and pushes out purified air through vents. Dyson also adds its signature Air Multiplier technology, which creates a stronger airflow and even doubles up as a gentle breeze. When set to oscillate, it can replace a pedestal fan. However, this could feel less useful in North Indian winters, where you might not want an extra draft, no matter how mild.
Performance-wise, the TP07 is excellent. It responds instantly to rising PM2.5 levels, ramping up fan speed automatically until the air quality is safe. In our test, when PM2.5 was raised to 350, the Dyson brought it down to 16 within an hour and didn’t reduce speed until the levels dipped below 35. The sensor is both precise and highly responsive, making the auto mode truly reliable.
On the features front, Dyson offers more than most competitors. The LED display and magnetic remote give you control over fan speed (10 levels), oscillation (up to 350°), auto mode, night mode, and even an airflow diffusion option for winters. Beyond that, the Dyson Link app allows you to manage all these functions via your phone. The app also provides detailed real-time readings—including PM2.5, PM10, VOCs, NO2, temperature, humidity, and AQI—along with weekly air quality history and filter life status.
A thoughtful touch is the magnetic remote, which neatly snaps onto the top of the purifier so it’s always within reach.In short, while it comes at a steep price, the Dyson TP07 combines powerful performance, smart features, and sleek design, making it one of the most advanced air purifiers available in India.
The Coway Air Mega 150 is among the best-selling air purifiers in India, priced at around ₹13,900 (at the time of publishing). With a CADR of 376 m³/hr, it’s rated to cover up to 355 sq. ft, making it suitable for medium-sized rooms.
One feature we really liked is the pre-filter design. Unlike most purifiers where you need to remove the front panel, Coway allows you to slide out the pre-filter like a cartridge. This makes it much easier to take out and clean regularly. Behind it, you get an activated carbon filter and a Grade 13 HEPA filter. That said, the carbon filter felt a bit underwhelming—it’s a thin mesh that looks somewhat cheap. In comparison, Philips offers a sturdier carbon filter framed with granular activated carbon, which feels more premium.
In terms of performance, the Coway Air Mega 150 does a decent job. In our test, when PM2.5 levels were raised to 350, it brought them down to 32 within an hour on auto mode. The fan speed responded quickly, kicking up within 10–15 seconds of detecting rising pollution. However, there’s a catch: the purifier starts lowering its fan speed once PM2.5 levels drop to around 200, and then it fluctuates between higher and lower speeds until finally settling at the minimum once levels fall below 150.
This isn’t ideal because ideally, an air purifier should continue at higher speeds until PM2.5 levels are safely below 35. The issue seems to be with the precision of the air quality sensor—it isn’t as accurate as it should be.Overall, the Coway Air Mega 150 offers solid airflow and thoughtful design touches, but its sensor accuracy and weaker carbon filter hold it back from being the best option in its price range.
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