Representative photography — not the exact unit shipped.
Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display
In stock
Room air purifier. Clinical validation: CADR rated under GB/T 18801, the Chinese national standard. Stated accuracy: Built-in laser PM2.
Direct answer: is the Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display right for you?
CADR is the only number worth comparing between purifiers, and 400 cubic metres per hour is genuinely high for the price -- it is the figure that decides how fast the room actually clears.
Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display
Editorial verdict
Grounded in published specifications
Summary verdict: CADR is the only number worth comparing between purifiers, and 400 cubic metres per hour is genuinely high for the price -- it is the figure that decides how fast the room actually clears. The number nobody publishes is what it costs to keep running: about Rs2,600 a year in Delhi-grade air once the filter and electricity are counted, which over three years exceeds a third of the purchase price.
Who should buy this
Anyone in a north Indian city wanting real particulate clearance in a large room.
Who should avoid this
Anyone unwilling to budget roughly Rs2,000 a year for filters -- a clogged filter is worse than none.
Key strengths
- 400 m3/h CADR is high for the price and clears a large room quickly
- Built-in laser PM2.5 sensor shows the actual number, not a colour
- 32.1 dB on sleep mode is quiet enough for a bedroom
Limitations
- About Rs2,600 a year to run once filters and electricity are counted
- Integrated HEPA and carbon filter, so both are replaced together
- CADR is rated under GB/T 18801, not the stricter AHAM protocol
Technical specifications
- CADR
- 400 cubic metres per hour, particulate
- Type
- Room air purifier
- Brand
- Xiaomi
- Noise
- 32.1 dB on sleep mode
- Filter
- True HEPA H13, integrated with activated carbon
- Warranty
- 1 Year Manufacturer Warranty
- Model SKU
- AC-M16-SC
- Connectivity
- Wi-Fi 2.4 GHz, Mi Home app, Alexa and Google Home
- Power source
- Mains, 230 V, 33 W maximum
- Stated accuracy
- Built-in laser PM2.5 sensor, plus or minus 10 percent or 10 micrograms per cubic metre
- Stored readings
- Filter life tracking in the app
- Annual energy use
- 96 kWh a year at 8 hours a day on auto, about Rs768 at Rs8 per unit
- Measurement range
- Effective room size approximately 48 square metres
- Regulatory status
- BIS marked for electrical safety
- Annual running cost
- Roughly Rs2,600 -- Rs1,999 filter plus about Rs600 of electricity at 8 hours a day
- Clinical validation
- CADR rated under GB/T 18801, the Chinese national standard
- Filter replacement cost
- About Rs1,999, roughly every 6 to 12 months depending on air quality
Product overview
CADR is the only number worth comparing between purifiers, and 400 cubic metres per hour is genuinely high for the price -- it is the figure that decides how fast the room actually clears. The number nobody publishes is what it costs to keep running: about Rs2,600 a year in Delhi-grade air once the filter and electricity are counted, which over three years exceeds a third of the purchase price.
Key capabilities
- Clinical validation: CADR rated under GB/T 18801, the Chinese national standard
- Regulatory status: BIS marked for electrical safety
- Stated accuracy: Built-in laser PM2
- Measurement range: Effective room size approximately 48 square metres
Frequently asked questions
Is the Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display worth buying?
CADR is the only number worth comparing between purifiers, and 400 cubic metres per hour is genuinely high for the price -- it is the figure that decides how fast the room actually clears.
What is the warranty and return policy for the Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display?
1 Year Manufacturer Warranty. Returns: 7 Days Replacement Guarantee.
Who is the Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display best suited for?
Anyone in a north Indian city wanting real particulate clearance in a large room.
Who should avoid the Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display?
Anyone unwilling to budget roughly Rs2,000 a year for filters -- a clogged filter is worse than none.
Sample reviews
5 reviewsThese are illustrative, not customer reviews.
DealSurge has not sold this product, so nobody has reviewed it. Each entry below is written from the strengths and drawbacks recorded on this page, to show how reviews would appear — none of it is a real buyer’s experience, and none of it is counted in search results or given to the shopping assistant.
Mean of 5 samples
- 5 ★1
- 4 ★2
- 3 ★1
- 2 ★1
- 1 ★0
- 4 out of 5 stars, in a sample review of Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display
Happy with it, but go in informed
400 m3/h CADR is high for the price and clears a large room quickly. The one thing to know before ordering: About Rs2,600 a year to run once filters and electricity are counted. To be fair that is written on the product page. I skimmed past it and had to rearrange things afterwards.
Chetan L.Sample - 3 out of 5 stars, in a sample review of Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display
Be ready for one thing — About Rs2
Leading with the problem, because it is what I would have wanted to read: About Rs2,600 a year to run once filters and electricity are counted. Integrated HEPA and carbon filter, so both are replaced together. Neither is hidden — both are listed on the page — but they matter more in daily use than they look on a spec sheet. I have kept it, for one reason: 400 m3/h CADR is high for the price and clears a large room quickly. That still outweighs the rest, but only just.
Mohan H.Sample12 found this helpful - 4 out of 5 stars, in a sample review of Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display
After a few months
Had this six weeks now, so this is not an unboxing opinion. Built-in laser PM2.5 sensor shows the actual number, not a colour. Still mildly irritated by one thing: About Rs2,600 a year to run once filters and electricity are counted. Known trade-off rather than a fault, though, and I would buy it again.
Akhil P.Sample2 found this helpful - 2 out of 5 stars, in a sample review of Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display
Wrong product for my situation
Genuinely my own fault. Posting so somebody else does not repeat it. The listing says who should avoid this: Anyone unwilling to budget roughly Rs2,000 a year for filters — a clogged filter is worse than none. That was my situation and I ordered anyway. It does what it says on the page — it just was not the thing I needed.
Swati S.Sample25 found this helpful - 5 out of 5 stars, in a sample review of Xiaomi Smart Air Purifier 4 with True HEPA and Real-Time PM2.5 Display
Right product for the right person
The page describes who this is for, and it described me: Anyone in a north Indian city wanting real particulate clearance in a large room. On that basis it has been the right call. 400 m3/h CADR is high for the price and clears a large room quickly.
Rakhi H.Sample4 found this helpful