Winix 5500-2 review

The Winix 5500-2 is a longtime budget favorite that punches well above its roughly $160 price, thanks to strong airflow and a genuinely money-saving washable carbon filter. If you want mid-size-room performance without paying mid-tier money, it belongs on your shortlist. The verdict: excellent value for a main room, with one caveat: it has been superseded by the newer Winix 5510.

How it performs

The 5500-2 delivers CADR ratings of 232 for smoke, 243 for dust, and 246 for pollen. Those are strong numbers that sit right alongside the more expensive Coway Mighty, and they back up its 360-square-foot rating. In practice that means it clears a mid-size living room or large bedroom quickly, and it has enough output to make a real dent during a smoke event, where the guiding rule is to match smoke CADR to your room's square footage. At 232 for smoke, the 5500-2 is well suited to rooms around 230 square feet and still capable up to its full rating.

Filtration runs in stages: a washable pre-filter, a True HEPA filter for fine particles down to 0.3 microns, and an activated carbon filter for odors. There's also Winix's PlasmaWave feature, an ionizing step that, like all ionizers, carries a small risk of producing lung-irritating byproducts. The good news is that PlasmaWave is optional and can be switched off, and the unit filters perfectly well without it. Leave it off and you still get true HEPA capture.

Filters and running cost

Running cost is where the 5500-2 gets clever. The carbon filter is washable rather than disposable, so you rinse and reuse it instead of buying a new one each cycle. That keeps annual filter spend to about $50, mostly for the True HEPA replacement. Over three years that's roughly $150 in filters on top of the $160 purchase price, a genuinely low total for a machine this capable. The washable pre-filter and carbon layer are the reason it stays cheap to own. Model your own numbers with our filter cost calculator.

Noise and living with it

On its lowest setting the 5500-2 measures around 28 dBA, quiet enough for sleeping, and it climbs to about 59 dBA at full speed, which is noticeably loud but only needed during heavy pollution. It draws 70 watts on high, in line with other powerful mid-size units. Auto mode uses a built-in air-quality sensor to adjust the fan on its own, and there's a light sensor that dims the machine in the dark. What you don't get is any app or Wi-Fi: control is entirely from the physical panel, and air quality shows as a colored light rather than a phone readout. For buyers who don't want another connected device, that simplicity is welcome.