The Winix 5500-2 is the better buy for a bedroom, office or living room up to about 360 sq ft: it costs roughly $160, its filters run about $60 a year, and it has auto mode and a sensor. The Blueair Blue Pure 211i Max is the pick for anything bigger. It has nearly twice the Winix's airflow, adds an app, and draws less power at top speed, but it costs $70 to $190 more to buy and roughly $33 to $80 more a year in filters. This is a research-based comparison drawn from Winix's and Blueair's published specs, not a hands-on test.
Quick answer
Choose the Winix if your room is 360 sq ft or less and you want the lowest total cost. Choose the Blueair if your room is larger or open-plan, or you want app control.
| Attribute | Winix 5500-2 | Blueair Blue Pure 211i Max |
|---|---|---|
| CADR (smoke / dust / pollen) | 232 / 243 / 246 | 435 / 452 / 450 |
| Room size (CADR × 1.55) | ~360 sq ft | ~674 sq ft |
| Ionizer | PlasmaWave, can be switched off | HEPASilent stage, always on |
| Filter cost per year | ~$60 (Filter H, 12 months) | ~$93–$140 ($69.99 every 6–9 months) |
| Rated noise | ~28–59 dBA | 23–53 dB |
| Max power | 70 W | 46 W |
| Smart features | Auto + sensor (no app) | Auto + PM1/PM2.5/PM10 sensor + app |
| Typical price | $150–$170 | $230–$350 ($349.99 list) |
Where the Winix wins
The Winix 5500-2 wins on price, both at the register and every year after. At roughly $150 to $170 it costs about half the Blueair's $349.99 list price, and its True HEPA Filter H runs about $60 a year at Amazon pricing ($84.99 list at Winix) on one change a year. The carbon pre-filter is washable, so the HEPA filter is the only part you routinely replace. Our Winix air purifier reviews cover the 5500-2 and its 5510 sibling in more depth.
It also gives you a choice on ionization. Winix's PlasmaWave can be switched off, leaving purely mechanical filtration; the Blueair's charging stage can't. And for a typical bedroom the Winix has plenty of air: in a 12×15 room with 8-foot ceilings its 232 CFM works out to nearly 10 air changes an hour at full speed, double the target. Auto mode, a sleep mode and a filter indicator cover the basics, even without an app.
Where the Blueair wins
The Blueair Blue Pure 211i Max wins on airflow, and not by a little. Its 435 CFM smoke CADR is nearly double the Winix's 232. In a 400 sq ft living room with 8-foot ceilings, the Winix manages about 4.4 air changes an hour flat out, just short of the 4.8 target; the Blueair delivers about 8.2, so it can hit the target on a low speed. Past 400 sq ft the Winix is simply undersized. Our Blueair air purifier reviews cover where the 211i Max sits in Blueair's range.
It also wins on features and efficiency now. The 211i Max adds an app with schedules, filter-life tracking and voice-assistant control on top of its sensor-driven auto mode, and it tops out at 46 W against the Winix's 70 W. Blueair's warranty extends from one year to three if you register within 60 days.
What three years actually costs
The first filter ships in the box on both, so three years means two more Winix filters and three to five more Blueair filters.
| Winix 5500-2 | Blueair 211i Max | |
|---|---|---|
| Purchase | $150–$170 | $230–$350 |
| Filters to buy in years 1–3 | ~$120 | $210–$350 |
| Purchase + filters | ~$270–$290 | ~$440–$700 |
| Electricity ceiling (max speed 24/7 at $0.17/kWh) | ~$313 | ~$206 |
On purchase and filters the Winix costs $150 to $430 less over three years, and filters are where the Blueair's bill grows. The electricity row runs the other way, but it's a worst case: neither maker publishes per-speed wattage, and in a room the Winix is sized for, neither machine would sit on top speed all day. Try your own prices in the filter cost calculator.
How to choose
Measure the room first. Up to about 360 sq ft, buy the Winix 5500-2: it cleans the space properly, has auto mode, and costs well under half as much to own. Above that, or in an open-plan space, buy the Blueair Blue Pure 211i Max, and budget for its filters.
If you want the Blueair's big-room coverage but not its filter bill or its always-on ionizer, the Levoit Core 600S covers about 606 sq ft with an app and roughly $60-a-year filters. Our best air purifiers for large rooms roundup ranks it alongside the rest.
Frequently asked questions
Is the Winix 5500-2 or Blueair 211i Max more powerful?
The Blueair Blue Pure 211i Max, by a wide margin. It is rated at 435 CFM for smoke against 232 CFM for the Winix 5500-2, which is roughly 674 sq ft versus 360 sq ft at the site's 4.8 air-changes-an-hour standard. The Winix is sized for a bedroom or medium living room; the Blueair is sized for an open-plan space.
Does the Winix 5500-2 have an app?
No. The Winix 5500-2 has an air-quality sensor, auto mode, sleep mode and a filter indicator, but no Wi-Fi or phone app. The Blueair 211i Max has a sensor and auto mode too, and adds an app with schedules and Alexa or Google Assistant control. If app control matters, the Blueair is the one of these two that has it.
Which has cheaper filters, Winix or Blueair?
The Winix. Its Filter H (116130) runs about $60 a year at Amazon pricing on a 12-month change, and its carbon pre-filter is washable. The Blueair 211i Max takes a $69.99 filter every six to nine months, about $93 to $140 a year. Over three years that's roughly $120 in Winix filters against $210 to $350 for the Blueair.
Is the Blueair 211i Max worth paying more for?
If your room is bigger than about 360 sq ft, yes, because the Winix simply doesn't have the airflow to keep up. The Blueair also adds an app and draws 46 W at most against the Winix's 70 W. In a bedroom or a medium living room, though, the Winix does the job for well under half the three-year cost.
Winix or Blueair, which is quieter?
On spec sheets the Blueair: 23 to 53 dB against roughly 28 to 59 dBA for the Winix. The bigger factor is headroom. In a 400 sq ft room the Winix has to run near its top speeds to hit the target air-change rate, while the Blueair can sit on a low setting.
