Xiaomi Smart Air Purifier 4
Xiaomi
- 400 m³/h CADR
- Up to 516 sq ft
- True HEPA H13
First air purifier, second bedrooms, and anyone who wants maximum performance per rupee.
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Brand: Qubo
Room air purifier, H13 HEPA, CADR 330 m³/h
Our editorial score
Good — right for the specific buyer
A bedroom or a mid-sized living room
Catalogue listing — not a hands-on review
We have not tested this unit. The specifications below are parsed from the manufacturer's own listing, the features are their wording, and the score is calculated from those specifications rather than assigned by an editor. For models we have examined in depth, see our ranked air purifiers guides.
At ₹8,990 (MRP ₹17,990, so 50% off on the day we checked), the Qubo Q400 Smart is one of Qubo's air purifiers on Amazon.in. That is well under the ₹14,890 typical for a air purifier in this catalogue.
What to look at first is its CADR: 330 m³/h. A rough rule is that this cleans a room of about 400 sq ft five times an hour, which is what you want for PM2.5 in a bedroom.
Source: the Amazon.in listing (ASIN B0CMHDMPWX), checked 12 October 2026. Nobody here has used this purifier. Treat the price as a snapshot; the specification is what the seller publishes.
Every condition below is derived from this product's published specifications and from how it compares with the air purifiers we track — so you can check each one against your own room, supply or budget rather than take our word for it.
Your room is bigger than about 200 sq ft
It is rated for 400 sq ft, but that assumes roughly one air change an hour. For visible results in Indian winter conditions, halve it — which puts the realistic ceiling near 200 sq ft.
Work out the CADR you need →You are trying to remove smells, smoke or gases
No meaningful activated-carbon stage is fitted. HEPA captures particulate and does nothing whatsoever for gases and odours — this is the most common mismatch in the category.
Purifiers with real carbon filtration →You want to verify it is working rather than trust it
There is no numeric PM2.5 readout. A colour ring cannot tell you the room went from 180 to 22 µg/m³, and it cannot tell you the filter is exhausted.
You live outside a metro or a major service town
Qubo's service network is rated good rather than excellent. Filter availability and callout times are what decide whether a purifier is still running in five years, and they are worth checking for your pin code before you buy.
How we score service reach →| Type | Room air purifier |
|---|---|
| Filter | H13 HEPA + activated carbon |
| CADR | 330 m³/h |
| Rated room size | Up to 400 sq ft |
| Air-quality display | Yes |
| App / Wi-Fi | Yes |
Specifications are from manufacturer literature and were checked at the last price-verification date. Brands occasionally revise stage counts, tank sizes and warranty terms without changing the model name — confirm against the current listing before purchasing.
Qubo is the smart-device brand of Hero Electronix, part of the Hero Group, and sells the widest dash cam range of any single brand in India — from the ₹3,490 Pro X to 4K front-and-rear and a 4G live-view camera. Nearly every Qubo dash cam uses a supercapacitor.
Xiaomi
First air purifier, second bedrooms, and anyone who wants maximum performance per rupee.
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Levoit
Bedrooms and nurseries where noise matters more than raw coverage.
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Philips
The best-value bedroom air purifier for most Indian households.
View details
Qubo
A living room or open-plan space
View detailsFree consultation · Pan-India
Tell us your city, your water source and your budget. For homes we will recommend the right technology — including telling you when a ₹3,000 purifier is genuinely enough. For offices, societies and factories, our team will size a system against your water report and send a specification-backed quotation.
Or email betterworkindia@gmail.com — attach a water analysis report and we can quote faster.
Homes
Right-sized recommendation for your TDS, not the most expensive unit
Offices & societies
25 LPH to 2,000+ LPH, sized on headcount and feed water
Industry
Pharma, food, textile, boiler feed — engineered to your specification
Service & AMC
Installation, repair and AMC with written response times