Product Buying Guides

Which parts of an air purifier are washable and which will be ruined by water, taken from each manufacturer’s own instructions, plus what a proper cleaning routine is actually worth in filter cost.

Five free checks and one real test with a cheap PM2.5 meter. A checkable method for confirming your air purifier is moving clean air, plus how to tell a broken machine from an undersized one.

PuroAir and AirDoctor priced and audited against their own spec sheets: verified prices, the coverage figures that are not measured the same way, and three years of filter costs on both.

Same shelf, same price band, two completely different filter economies. Winix publishes AHAM verified CADR and PuroAir publishes none, and over three years the arithmetic is not close. Every figure verified against the manufacturers’ own pages.

Manufacturers publish decibels at the lowest fan speed and CADR at the highest, and the two never describe the same operating point. Only two brands publish airflow and noise together, which is the only honest way to rank a bedroom purifier.

Ranked strictly on published smoke CADR, dollars per cfm of delivered clean air, and what each machine costs to run flat out for thirty days. Every figure verified against the manufacturer’s own page, with EPA and AirNow guidance linked.

Pet dander is a particle problem, but odor is a gas problem and hair is a clogging problem. This ranking sorts on activated carbon and pre-filter washability, with every price, decibel figure and CADR number verified against the manufacturer’s own page.

A two way head to head between PuroAir and Dyson using prices, filter intervals, warranty terms and airflow figures pulled from both manufacturers this session. Dyson is judged on design, fan function and app ecosystem rather than dollars per CADR, and it wins three year cost on hardware plus filters at both tiers at PuroAir’s 90 day product page cadence, though PuroAir takes both tiers back at the three to five month interval its own FAQ gives. Neither brand publishes an AHAM verified clean air delivery rate, and Dyson publishes no wattage at all.