Winix
Winix 5520
$259.99Cheaper
Released 2022
Best Air Purifiers · head-to-head
Winix 5520 vs Rabbit Air BioGS 2.0
A sourced, side-by-side comparison. Winix 5520 is cheaper at $259.99. Every spec and price links to its source.
Rabbit Air
Rabbit Air BioGS 2.0
$369.95
Released 2017
Which is better: the Winix 5520 or Rabbit Air BioGS 2.0?
The Winix 5520 wins 1 of the 1 specs we compare head to head; the other wins 0. The Winix 5520 is the cheaper at $259.99. The Winix 5520 both leads on specs and costs less — the straightforward pick.
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Key specs, head to head
The numbers that decide it, drawn to scale — longer bar wins, the accent bar is the stronger figure.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Winix 5520 | Rabbit Air BioGS 2.0 |
|---|---|---|
| US price | $259.99 | $369.95 |
| Brand | Winix | Rabbit Air |
| Released | 2022 | 2017 |
| Cadr smoke (CFM) | 253 | 136 |
| Coverage (sq ft) | 392 | 550 |
| Hepa | Yes | Yes |
| Filter type | Fine Mesh Pre-filter + AOC Carbon + True HEPA + PlasmaWave (4-stage) | Pre-filter + BioGS HEPA + Dual Hive AC Charcoal + Negative Ion Generator (4-stage) |
| Noise db min | 23.5 | 22.8 |
| Smart | Yes | No |
| Energy star | No | No |
| Release | 2022 | 2017 |
Sources — Winix 5520: winixamerica.com (verified 2026-06-15). Rabbit Air BioGS 2.0: rabbitair.com (verified 2026-06-15).
What's the difference between the Winix 5520 and Rabbit Air BioGS 2.0?
Where the two actually differ on the specs we track (5 of 7). Matching specs are omitted.
- Cadr smoke (CFM): Winix 5520 253 vs Rabbit Air BioGS 2.0 136
- Coverage (sq ft): Winix 5520 392 vs Rabbit Air BioGS 2.0 550
- Filter type: Winix 5520 Fine Mesh Pre-filter + AOC Carbon + True HEPA + PlasmaWave (4-stage) vs Rabbit Air BioGS 2.0 Pre-filter + BioGS HEPA + Dual Hive AC Charcoal + Negative Ion Generator (4-stage)
- Noise db min: Winix 5520 23.5 vs Rabbit Air BioGS 2.0 22.8
- Smart: Winix 5520 true vs Rabbit Air BioGS 2.0 false
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Winix 5520
Only one whitelisted tester (Wirecutter) hands-on tested the exact Winix 5520, and only in its dismissed-competition section: a capable purifier that tested worse and louder than Coway's Mighty 2, with a dark, monolithic form that stands out in most rooms, a display that shuts off only on the lowest and least effective fan speed, and an ionizer that reactivates on every power-on. No lab numbers were published for this model. (1 sourced review, 1 lab-tested.)
Praised: Capable air-cleaning performance.
Flagged: Tested worse than, and louder than, Coway's Mighty 2; Display only shuts off on the lowest, least effective fan speed; Reverts to its ionizing function on every power-on.
Rabbit Air BioGS 2.0
Only one whitelisted tester, Tom's Guide, hands-on reviewed this exact model. It calls the BioGS 2.0 a quiet, inexpensive purifier that cleans a mid-sized room well, but flags weak airflow and the absence of WiFi or an app. Consensus rests on a single source. (1 sourced review, 1 lab-tested.)
Praised: Quiet operation — peak wind noise measured at 56 dBA, far below noisier rivals; Inexpensive at $369, roughly half the price of comparable purifiers; Simple to operate with a remote control and a fast-reacting auto mode.
Flagged: Low airflow that pales next to the best in its class; No WiFi, app, or Alexa/Google Home integration; Lacks a tip-over safety switch.