Reviews are independent. Prices are indicative (SGD) and change often — always check the latest price before buying. We may earn a commission from some links.
Hands-on Review
The Xiaomi Smart Air Purifier 4 is a standout value pick — proper HEPA filtration, a numeric OLED air-quality display, full app and voice control, and coverage for a medium-to-large room, all at a price that undercuts the big brands. Filter availability is the main thing to plan for.
The Xiaomi Smart Air Purifier 4 is a smart HEPA air purifier with an OLED touch display and full Xiaomi Home app control, aimed at Singapore households that want data-rich, connected filtration for a medium-to-large room without paying premium-brand prices. It packs features usually reserved for pricier units into an affordable, well-designed tower.
In the local market it is one of the best value-for-money purifiers you can buy, especially for households already in the Xiaomi ecosystem. It delivers the numeric PM2.5 read-out, auto mode and remote control that make a purifier easy to trust during haze — the main caveats being genuine-filter sourcing and the usual grey-import considerations with Xiaomi gear.
Key specs
| Spec | Detail |
|---|---|
| Type | Smart HEPA air purifier with OLED display |
| Filtration | 3-in-1 pre-filter + HEPA + activated carbon |
| Coverage | Medium-to-large rooms |
| Display | On-unit OLED with numeric PM2.5 read-out |
| Smart features | Xiaomi Home app, scheduling, voice-assistant support |
| Noise | Quiet sleep/favourite mode; audible on high |
| Filter life | 3-in-1 cylindrical filter, replaced periodically |
| Price (indicative SGD) | $150–$280 |
Who it’s for
- Value seekers who still want a display, app and numeric PM2.5
- Xiaomi ecosystem users wanting everything in one app
- Medium-to-large-room households on a budget
- Skip it if you want guaranteed easy local filters and premium after-sales
- Skip it if you prefer a sensor-free, ultra-simple unit
Cleaning & haze performance
The 3-in-1 HEPA filter captures fine PM2.5 well and the carbon layer handles cooking odours, with airflow strong enough for a medium-to-large room. Auto mode reacts quickly to spikes — cook, and you watch the OLED number climb then fall as it ramps the fan. For haze season this data-and-response combination makes it genuinely reassuring for the money.
Display, app & smart control
The OLED numeric PM2.5 read-out is a highlight at this price, and the Xiaomi Home app adds scheduling, remote control, filter-life tracking and history, plus voice-assistant support. For anyone already running Xiaomi devices it slots straight into the same app, and the automation possibilities are a real bonus over dumb purifiers.
Noise & bedroom use
On sleep or low ‘favourite’ speeds it is quiet enough for overnight use in a bedroom, while higher speeds needed for a big room are clearly audible. It straddles bedroom and living-room duty reasonably well, though a dedicated quiet bedroom unit will edge it for pure silence.
Filters, value & the catch
Value is exceptional — you get flagship-style features for mid-brand money. The trade-off is filter sourcing: Xiaomi is heavily grey-imported, so buy the local set and confirm genuine replacement filters are easy to get, otherwise you risk hunting parts later. Keeping the pre-filter clean in our humidity helps the 3-in-1 filter last.
Pros and cons
Pros
- Outstanding value for a smart HEPA purifier
- Numeric OLED PM2.5 read-out at a low price
- Full Xiaomi Home app, scheduling and voice control
- Medium-to-large-room coverage
- Slots into existing Xiaomi smart-home setups
Cons
- Filter sourcing needs care — buy local sets
- Grey imports complicate warranty and support
- Audible at the speeds a large room needs
- After-sales less premium than established air-care brands
Price in Singapore
The Smart Air Purifier 4 usually sells for around $150–$280 depending on the exact variant and promotions, undercutting comparable branded units with displays. Buy from Xiaomi’s official stores or authorised retailers for Singapore warranty and, importantly, easy genuine filters — grey-import sets are cheaper but make both support and filter matching harder. Check the latest price and variant before buying.
Alternatives to consider
- Coway Airmega 150 — Pick it for stronger local support and a washable pre-filter if you value after-sales over smarts.
- Philips Air Purifier Series 3000i — Step up for larger-room capacity and more established local filter supply.
- Novita Air Purifier A11 — Choose it if easy local filters and service outweigh app features.
Related on Globotix
Frequently asked questions
Is the Xiaomi Smart Air Purifier 4 worth it in Singapore?
For value, absolutely — you get a numeric display, app and voice control and medium-to-large-room coverage for less than the big brands. Just buy the local set and confirm genuine filters are easy to source, which is the main caveat.
Is it good for haze?
Yes. Its HEPA filter captures fine haze particles, auto mode reacts to spikes, and the OLED lets you watch PM2.5 numbers rise and fall so you know it is working.
Do I need the Xiaomi Home app?
No, the on-unit display and controls work standalone, but the app adds scheduling, history and voice control and is a big plus if you already use Xiaomi devices.
What is the running cost and the filter catch?
Mainly the periodic 3-in-1 filter. The important point is sourcing — Xiaomi is heavily grey-imported, so buy locally and confirm genuine filters are readily available to avoid parts hunts later.
Where should I buy it for warranty?
Buy from Xiaomi’s official stores or authorised retailers for Singapore warranty and reliable filters. Grey imports can be cheaper but complicate both support and replacement filters.
The verdict
The Xiaomi Smart Air Purifier 4 is one of the best-value smart purifiers on the local market — real HEPA filtration, a numeric OLED read-out and full app control for well below premium prices. Mind the filter-sourcing caveat and buy local, and it comfortably earns a 4.3 as the value champion of this round-up.
Planning a smarter home?
Tell us your space and budget — we’ll point you to the right devices, or connect you with a supplier.
