Winix A231 Review (Canada, 2026) — The best budget pick for bedrooms and small spaces.
By Winix Canada · Updated June 2026 · Independently tested
Overview
The Winix A231 is the one Winix we recommend for small bedrooms, home offices, and nurseries — anywhere under 250 sq ft where you don't want to spend $150+ on a C545. It's been the #1 bestselling Winix on Amazon.ca for the past 18 months, and the reviews back it up: nearly 3,200 ratings at 4.6 stars. In independent PM1 smoke testing by howtotechinfo.com, it cleared a test room of fine particles faster than the Levoit Core 300S and Xiaomi 4 Compact at similar price points. For wildfire smoke in a bedroom, it works. For an open-concept living area, you'll need the C545 or C610 — but in its niche, the A231 is the unbeatable pick.
Key Specs
| CADR (Smoke) | 148 CFM |
|---|---|
| Recommended Room Size | 230 sq ft |
| Dimensions | 10.1" W × 10.1" D × 16.0" H |
| Weight | 6.5 lbs (2.9 kg) |
| HEPA Filter Life | 12 months |
| Carbon Filter Life | 3 months |
| Noise Range | 20 dB (sleep) – 58 dB (max) |
| Wi-Fi / App | No — manual control only |
| PlasmaWave | Yes (toggleable) |
| Annual Running Cost (CAD) | ~$50–$70 |
| Warranty | 2 years |
| Certifications | AHAM Verified, Energy Star |
Performance
Despite its compact size and budget price, the A231 posts impressive PM1 smoke clearance speeds in independent testing — outperforming several rivals at the $120 CAD price point. Its 148 CFM CADR handles a standard 10x12 ft bedroom in around 20 minutes on max. Sleep mode at 20 dB is the quietest in the entire Winix lineup — measurably quieter than the C545 (27 dB) and C610 (22 dB) on their sleep settings. This makes it the top choice for light sleepers and parents of newborns.
Noise Levels
Measured at 3 ft. from the unit.
| Speed | dB Level | What it sounds like |
|---|---|---|
| Sleep Mode | 20 dB | Virtually silent — one of the quietest purifiers made |
| Speed 1 | 28 dB | Inaudible at night |
| Speed 2 | 36 dB | Whisper-quiet hum |
| Speed 3 | 44 dB | Soft white noise, suitable for bedrooms |
| Speed 4 (Max) | 58 dB | Audible — use briefly for quick cleans |
Filter Costs in Canada
The A231 uses Winix Filter A (part code 115115 — the same filter used by the 5500-2 and several older models). OEM on Amazon.ca: ~$45–$65 CAD. Third-party compatible options (check for Filter A or code 115115 compatibility) run $20–$35. The HEPA lasts 12 months; the carbon pre-filter needs swapping every 3 months. Annual spend: roughly $50–$70 if you buy OEM, or $30–$40 with third-party filters.
Pros & Cons
Pros
- Cheapest Winix with True HEPA — great value under $130 CAD
- Ultra-quiet at 20 dB on sleep mode — ideal for nurseries
- Compact footprint — fits on a nightstand or desk
- PlasmaWave for extra odour control
- Clears PM1 particles faster than comparable Levoit models
- Low annual filter cost (~$50–$70 CAD after year 1)
Cons
- No Wi-Fi or app — manual controls only
- Only covers 230 sq ft (a bedroom, not a main floor)
- Carbon filter needs replacing every 3 months
- No air quality display or auto mode
What Real Users Say
Sourced from Reddit, Amazon.ca, and independent review sites.
5.0howtotechinfo.comvia Independent Review2025"The A231 cleared a test room of PM1 particles (smoke) in just 40 minutes — faster than more expensive competitors like the Levoit Core 300S and Xiaomi 4 Compact. For a unit under $120 CAD, that's a genuinely impressive result."
5.0Budget-conscious buyervia Amazon.ca Review2025"Bought this for my teenage daughter's bedroom in Edmonton during wildfire season. Absolutely silent on sleep mode — she doesn't even notice it's on. Air quality indicator went from red to blue in about 20 minutes."
4.0Reddit r/AirPurifiersvia Reddit2026"If you just need something for a bedroom under 200 sq ft, the A231 is unbeatable at this price. No WiFi but honestly I don't need to check my air purifier on my phone."
Who Should Buy It?
Anyone who needs a purifier for a bedroom, home office, or nursery under 230 sq ft and doesn't want to spend $150+. Parents of newborns who need the quietest possible sleep mode. Anyone buying a second unit for a small room when they already have a C545 or C610 for the main area. Not the right choice for open-concept spaces, larger living rooms, or anyone who wants app control.
Costco Canada Note
The A231 is not currently carried at Costco Canada — it's an Amazon.ca and major retailer exclusive. Amazon.ca has it Prime-eligible year-round, with regular deals in the $99–$109 range during sale events.
Final Verdict
For a bedroom or nursery, the A231 is the best value Winix you can buy. At $119 CAD, it captures wildfire smoke, allergens, and pet dander just as effectively as the C545 in small rooms — for $30–$50 less. The lack of Wi-Fi is a real trade-off, but if you're buying a bedroom purifier and not a smart-home hub, you probably don't miss it.