SIDE BY SIDE

Compare products.

See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.

Change products

Product 1Product 2Product 3 (optional)Product 4 (optional)

Our pick for a small bedroom or office

Blueair Blue Pure 511

US model, store item 109994, with one Particle + Carbon filter and an Arctic Trail pre-filter

$99.99US price, checked Oct 13, 2026

Low-cost purifier for one room up to about 190 ft², with filters at $48 a year

Check price at Blueair Full review →

Portable air purifier

Austin Air HealthMate

HealthMate standard model

$715US price, checked Oct 13, 2026

Heavy steel purifier with lots of carbon, five-year filters and no published CADR

Check price at Austin Air Full review →

Criterion	Blueair Blue Pure 511	Austin Air HealthMate
US price	$99.99Checked Oct 13, 2026 · Price details in the review	$715Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$243.93 Incomplete known subtotal. Not included: energy use.	$952 Incomplete known subtotal. Not included: energy use.
Choose if	A bedroom or office up to about 190 ft² where you want a cheap, simple purifier with low filter costs.	You want a steel purifier with lots of carbon for odors and a filter change only every few years.
Main trade-off	It covers only one small room, and it has three manual speeds with no air sensor or auto mode.	You pay $715 or more without a CADR, room size, noise or wattage figure to judge it by.
Key specifications	CADR (smoke, dust, pollen): 122, 123 and 123 cfm Room size: 189 ft² at 4.8 air changes an hour (one change every 12.5 minutes) Noise: 24 to 49 dB in the spec table; 22 dB on low and 44 dB on high in the FAQ Power draw: 16 W, a single figure with no low or high Filters: One Particle + Carbon filter behind a washable pre-filter Filter life and price: About 6 months; $23.99 per filter, $6.99 per pre-filter Controls: Three manual fan speeds and a filter-change light; no air sensor Size and weight: 13.4 × 7.9 × 7.9 in; 4.2 lb	CADR (smoke, dust, pollen): Not published by Austin Air Room size: Not published. Austin Air says only that it can clean large rooms Filter: One 4-stage filter: two pre-filters, 780+ cu in of carbon and zeolite (up to 15 lb), 60 sq ft of HEPA HEPA efficiency (maker's claim): 99.97% of particles down to 0.3 micron and 99% down to 0.1 micron Filter life and price: Up to 5 years in normal home use; $395 per replacement Fan: 3-speed centrifugal; motor rated for continuous use Power draw and noise: Not published. The manual gives only the outlet: 120 V AC, 60 Hz Wheels: The manual lists easy-roll wheels on standard-size models Size and weight: 14.5 × 14.5 × 23 in; 47 lb
Exact variant	US model, store item 109994, with one Particle + Carbon filter and an Arctic Trail pre-filter	HealthMate standard model
Dimensions	13.4 × 7.9 × 7.9 in (height × width × depth). It weighs 4.2 lb.	14.5 L × 14.5 W × 23 H in; 47 lb.
Installation	None. Plug it in and it blows clean air out the top. Blueair's page links no manual, so it doesn't say how much wall clearance it needs.	No installation. It plugs into a standard 120 V outlet. Austin Air says to set it on a flat, dry, stable surface at least four inches from any wall, with the vent facing away from the wall. It's meant to run 24/7.
Materials	A single Particle + Carbon filter sits behind a washable pre-filter. Blueair says the filter captures PM2.5, pollen, dust mite allergen and pet dander allergen. The carbon is aimed at light household odors such as smoke and cooking. Blueair calls the system HEPASilent, a mix of electrostatic and mechanical filtration. Pre-filters come in Arctic Trail, Night Waves and Winter Reed.	Steel housing with a 360° perforated intake and a baked-on powder-coat finish. The filter has a large-particle pre-filter, a medium-particle pre-filter, over 780 cubic inches of activated carbon and zeolite (up to 15 lb), and 60 sq ft of HEPA media.
Warranty	One year from purchase, or two if you register. Blueair's warranty page gives 60 days to register, in your Blueair account or the app. That page doesn't name the 511, so the two-year term comes from the product page. You need to replace filters on Blueair's schedule and keep proof of purchase. Coverage is for the original owner only, and warranties aren't available through third-party resellers. In the first year a defective unit is exchanged for a new or equivalent one. During the registered extension, the replacement is refurbished. Coverage ends if the unit leaves the continental US or Canada. Filters are covered for 30 days.	Five years on the unit against defects in material and workmanship, under normal home use. Coverage depends on returning the warranty registration. The filter has its own five-year pro-rated warranty, and Austin Air doesn't explain how the pro-rating works.
Returns	30 days from purchase for items bought directly from Blueair, sent back with Blueair's prepaid label. Filters and pre-filters that are used or out of their plastic wrap can't be returned. Shipping charges, including the $5 flat rate, aren't refunded. Blueair takes 10 to 14 days to process a return. The refund then reaches your original payment method within 3 to 5 business days.	30-day money-back guarantee, no questions asked. Austin Air doesn't say who pays return shipping.
Unresolved questions	Whether it's listed in AHAM's Verifide directory or Energy Star's product finder; neither directory could be read Whether CARB has certified it; the part of CARB's list that loaded showed four other Blueair models Power draw on low, and which speed the 16 W figure refers to Noise at speed 2 Whether the electrostatic part of HEPASilent gives off any ozone Wall clearance and other setup guidance from the manual	CADR for smoke, dust and pollen, and the room size it suits Power draw at each speed, so running cost is unknown Noise at each speed How the pro-rated filter warranty is calculated Why Austin Air's two stores list different prices Whether it's in AHAM's Verifide directory or on CARB's certified list

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.