Ask most people where India's air problem is worst and they'll say Delhi. They're not wrong, but they're not covering nearly enough ground. The 2025 World Air Quality Report from IQAir puts India 6th out of 143 countries ranked by PM2.5, with a population weighted average of 48.9 µg/m³, and it counts 66 of the world's 100 most polluted cities inside India's borders. The single most polluted city on the planet that year wasn't Delhi. It was Loni, in Ghaziabad district, at 112.5 µg/m³.
So if you've been holding off on an air purifier because you don't live in the capital, the data doesn't back that decision up. This is the buying guide for everyone else: what actually matters when you shop for an air purifier online in India, and ten models we stock and can ship, spread from compact bedroom units to whole-home machines.
Is air pollution only a Delhi problem?
No. Six of the ten most polluted countries in the world are in South Asia, and India's own national standard already assumes the air is dirty. The Central Pollution Control Board's National Ambient Air Quality Standard allows PM2.5 up to 40 µg/m³ a year, eight times looser than the WHO guideline of 5 µg/m³. That's not a Delhi rule, it's the number every Indian city is measured against, and most cities we've mentioned above sit well past it. Byrnihat in Meghalaya and Ghaziabad's satellite towns show up on the same worst-100 list as Delhi. If your city gets a smog advisory on the news even once or twice a winter, the case for an air purifier applies to you the same way it applies to Delhi NCR.
What actually matters when you buy an air purifier online in India?
Three things, in order: CADR for your room size, HEPA grade of H13 or better, and the running cost of filters. Everything else on the box is marketing.
CADR, or Clean Air Delivery Rate, tells you how much clean air a machine actually pushes out per hour. It's the only spec that predicts how fast a room gets cleaned, and manufacturers size their coverage claims for gentle, everyday pollution rather than a bad smog week. We've worked through the full sizing formula, room by room, in our guide to air purifiers for Delhi pollution, and the same maths applies wherever you live, not just NCR.
HEPA grade matters less than CADR once you clear H13. Going from no HEPA filter to H13 is the meaningful jump. H13 to H14 is a smaller one. Our breakdown of H13 versus H14 filters covers exactly what each grade certifies, if you want to go deeper before you buy.
Running cost is the one people skip and then complain about later. A HEPA filter that isn't replaced on schedule stops filtering and just pushes air around a dirty box. Budget for a replacement filter every season if you're running the machine daily through the bad months, more if you're in a particularly dusty city.
Do air purifiers really cut indoor pollution?
Yes, substantially, when they run all day and use a real HEPA filter. A modelling study of Delhi households published in Environment International found that all day HEPA filter use cut personal PM2.5 exposure from 103 µg/m³ down to 29 µg/m³ in non-smoking homes, a 72% reduction, and from 137 down to 30 µg/m³ in homes with a smoker, a 78% reduction. That translated into an estimated 8 to 37% reduction in PM2.5 attributable mortality depending on the household.
The same study is a useful reality check on part time use. Running the filter for only 8 or 15 hours a day, rather than continuously, left PM2.5 well above the WHO's interim indoor air target of 35 µg/m³ in every scenario they modelled. An air purifier switched off overnight, or unplugged whenever you leave the room, is doing a fraction of the job the box promises. If you're buying one, plan to actually leave it running.
Which air purifier should I buy online in India right now?
These are ten models we hold in stock, sorted low to high, spanning a single bedroom to an open plan living room. Prices move through the year, so we've given the bracket each sits in rather than a number that'll be stale by next month.
Levoit Core Mini, under Rs 6,000
A compact H13 HEPA unit built for a small bedroom, study or hostel room rather than a whole flat. It's the cheapest real HEPA purifier on this list, and the right call if you just need clean air where you sleep.
Honeywell Air Touch V5, under Rs 11,000
Four stage filtration with H13 HEPA, Wi-Fi app control and a long rated filter life, sized for a proper bedroom or a small drawing room. This is the model we point most first time buyers toward when they want an app and a PM2.5 readout without paying premium prices for either.
Sharp FP-F40E-T, under Rs 12,000
Sharp's dual purification pairs a true HEPA filter with its Plasmacluster ion technology, plus a haze mode that ramps the fan automatically when the room gets bad. Good middle ground if you want the filtration of a HEPA unit and don't mind the extras riding along.
Coway Airmega AIM, mid Rs teens
Coway backs the motor on this one for seven years, which is unusually long in this category, and the filter is rated to last a season and a half to two seasons before you need a replacement. Buy it if you'd rather pay a bit more up front and think about it less often.
Philips AC4221, under Rs 23,000
Rated for a large drawing room, with a real time AQI display on the unit itself so you can see the number change rather than trust a mode light. A solid pick for an open plan living and dining space.
Shark HP150EU, under Rs 27,000
The filter on this one is rated to run for up to five years before it needs swapping, which changes the running cost maths completely if you hate the idea of a recurring filter bill. Worth a look if the ongoing cost, not the sticker price, is what's putting you off buying at all.
Sharp FP-J80M-H, under Rs 28,000
Steps up to H14 grade HEPA with Plasmacluster added on top, sized for a large living room. If you were tempted by the FP-F40E-T above but want the stronger filter grade, this is the version to move up to.
Coway Airmega Storm, under Rs 28,000
Coway's professional grade unit, again with the seven year motor warranty, aimed at people who want a machine built to run continuously rather than get switched on for an hour in the evening.
Dyson Hushjet Compact HJ10, under Rs 29,000
Dyson's smaller footprint purifier, with app control and an electrostatic filter rated for up to five years of use. Buy this over the bigger Dyson machines below if desk or shelf space is tight and you still want the brand's filtration and build quality.
Dyson Hot+Cool HP11, mid Rs 50,000s
A heater, a bladeless fan and a HEPA purifier in one machine, controlled from a remote, an app or voice assistants. It earns its price as three appliances in one corner across both summer and winter, not because it out filters the cheaper dedicated purifiers above on CADR per rupee. Buy it for the combination, not for filtration alone.
How much should I budget to run one every year?
Filters, not electricity, are almost all of the ongoing cost. A HEPA replacement typically runs a season or two of daily use before it needs swapping, and a clogged filter is the single biggest reason people decide their air purifier "stopped working." Electricity is the smaller half of the bill on any of the machines above. Our guide to running costs works through the electricity and filter maths model by model, if you want the full numbers before you decide.
Is it safe to buy an air purifier online instead of at a showroom?
Yes, as long as the retailer will actually stand behind the warranty after the sale. An air purifier is a sealed appliance, not something you need to see or touch before buying, and every model above ships with the manufacturer's standard warranty honoured through us regardless of whether you order online or walk into the showroom. What you should check, wherever you buy from, is whether the seller is an authorised retailer for the brand, because warranty claims through grey market sellers are where people actually get stuck. We ship pan India, not just to Delhi NCR, and if you'd rather talk through room sizes and picks before ordering, the showroom option is still there too.
Buy an air purifier online in India
You can browse and buy an air purifier online from the ten picks above or the rest of our range, with delivery across India and the same warranty support whether you're in Delhi, Bengaluru, Kolkata or anywhere in between. Air pollution stopped being a one city problem years ago. Your air purifier shopping shouldn't be either.