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43 guides.
The MA1201 is a rolling console that humidifies an open house from one spot. It needs space, a wick every 30 to 60 days and careful cleaning, but nothing portable moves more water.
The View Plus is the most complete home air monitor Airthings makes: radon plus particles, CO2 and VOCs, on batteries or USB-C. It is expensive, and worth it mainly if you want radon too.
The Wave Enhance is Airthings' small, battery-powered monitor for bedrooms and offices. Unlike the old Wave Mini, it measures CO2 with an NDIR sensor. It does not measure radon or particles.
The Wave Plus does the two jobs most homes care about after particles, radon and ventilation, in a battery-powered disc you can mount on a wall. It skips PM2.5, and costs less for it.
The 45i is Alen's mid-size purifier: a strong claimed CADR, a choice of filters for different problems, and a lifetime warranty that only lasts as long as your filter subscription.
The 75i is Alen's large-room machine, built for open plan spaces up to about 540 sq ft at allergy-level air changes. It is quiet and efficient, but its CADR is Alen's own and it costs more than certified rivals.
The Atmotube PRO 2 clips to a bag and measures particles, CO2, VOCs and NOx wherever you go. Its predecessor tested well for particles in South Coast AQMD's program; the PRO 2 adds CO2.
The HealthMate Plus is the chemical-focused version of Austin Air's HealthMate: the same heavy steel body, with an impregnated carbon blend aimed at formaldehyde, VOCs, wildfire smoke odor and traffic fumes.
The HealthMate is built around one idea: a huge carbon bed that soaks up odors and chemicals for years. It is heavy, plain and expensive up front, and cheap to run after that.
The Awair Element looks better than most monitors and measures the five things most people care about. It is sold through Awair rather than Amazon, and independent accuracy data is thin.
The Awair Omni is built for offices and buildings, with a dashboard for fleets of monitors and RESET accreditation. In a home, you pay for features you will not use.
The 211i Max replaced the Blue Pure 211+, and it is one of the strongest purifiers AHAM lists at this price: 435 cfm of smoke CADR, very low power draw, and a choice of four filters.
The 411i Max is Blueair's small-room purifier: about the airflow of a Levoit Core 300, a quieter low setting, a particle sensor and app, and power draw lower than most lamps on its lowest speed.
Blueair's Classic 605 was a big steel box for large rooms. It is gone from AHAM's directory and from Amazon as a new unit. Here is what owners and shoppers should do instead.
The 200M is the version of Coway's Mighty that drops the ionizer. Same filters, same cheap yearly filter set, three manual speeds, and a sensor-driven Auto Mode.
The Airmega 400 is Coway's large-room machine: two filter sets drawing air from both sides, a smart mode that reads particles and light, and a five-year warranty. It is also expensive.
The Mighty has been the reference mid-size purifier for a decade. It is still cheap to run, but it is no longer in AHAM's directory, it carries an ionizer, and Coway has a successor.
Dyson's Purifier Cool PC1 replaces the TP07 in Dyson's US range. It is a well-built fan with a sealed HEPA filter, but Dyson publishes no CADR, so you pay a premium without a certified number.
The HP1 is Dyson's current heater, fan and purifier, sold in place of the HP07. It earns its price only if you will use all three jobs; as a purifier alone, certified machines do more for less.
The old FFAD5033W1 is no longer in ENERGY STAR's current list. Frigidaire's current 50-pint-class unit, the FHDD5034Y1, matches the Midea Cube's certified numbers; buy on price and features.
The AC4825 is one of the cheapest AHAM-listed towers, and its filters are cheap too. But its certified airflow fits a small bedroom, and its UV-C bulb adds upkeep without adding to the CADR.
The listing says 4,500 square feet and 80 pints max. ENERGY STAR says 32.46 pints a day under the DOE test. It is a good mid-size unit, as long as you size it on the certified figure.
The HCM-350 is a long-running evaporative bedroom humidifier with a dishwasher-safe tank. It needs a Filter A wick every 30 to 60 days, and Honeywell's own store now lists the white version as discontinued.
The HPA200 is the HPA300's smaller sibling: two R filters instead of three, 200 cfm of certified smoke CADR, simple buttons. Honeywell still sells it, but Amazon now lists only its filters.
The HPA300 is the plain-box classic: lots of certified airflow for the price, simple buttons, no app and no sensor. Its catch is filter upkeep: three HEPA filters and four pre-filters a year.
The AirVisual Pro's strength is context: it shows your indoor PM2.5 and CO2 next to outdoor air from IQAir's network. Independent field results were more modest than cheaper rivals, and it is pricey.
IQAir's HealthPro Plus is the purifier hospitals and the cautious buy: heavy, well sealed, with a gas filter and a HEPA stage that lasts four years. IQAir also refuses to publish a CADR, which makes it hard to compare.
The Classic 200 is a simple, quiet ultrasonic humidifier with a big tank for its size. Levoit still lists it on its own site, but it was not on Amazon US when we checked.
The Core 300-P is the small HEPA purifier most people start with. Its certified numbers fit a bedroom, not the 1,073 sq ft on the box, and its filters are cheap.
The Core 400S-P is the Core 300's bigger, smarter sibling: a laser particle sensor, auto mode and an app, with enough certified airflow for a living room up to about 360 sq ft.
The Vital 200S-P is Levoit's pet-household purifier: the most certified airflow in Levoit's mid-range, a side inlet that keeps fur off the filter, and a rectangular body that fits against a wall.
The MA-40 is AHAM listed with real airflow for its price and a lifetime warranty. Its weak points are a short filter interval, which makes running costs climb, and louder low settings than the best rivals.
The Cube's extendable body and large bucket solve the two things people hate about dehumidifiers: emptying them and storing them. The 50-pint model is the one most basements need.
Molekule's Air Pro pairs a HEPA layer with PECO, a photo-electrochemical stage Molekule says destroys pollutants. Ad regulators trimmed its claims, it publishes no CADR, and its filters cost about $350 a year.
The MistAire is a cheap, quiet tabletop humidifier for a small bedroom, nursery or office. It has no humidity sensor, and like every ultrasonic it wants distilled water.
The PurpleAir Flex is built to hang outside and feed the public PurpleAir map. It is a good outdoor particle sensor with independent test results. For indoor monitoring, PurpleAir points to other models.
The Qingping Air Monitor Lite is cheap, reads particles and CO2, works with Apple Home, and did well in South Coast AQMD's independent field test. It has no VOC or radon sensor and needs to stay plugged in.
The MinusA2 is the purifier you can hang on a wall. It is quiet, slim and lets you pick a filter for pets, odors or toxins. Its smoke CADR is Rabbit Air's own and smaller than its price suggests.
Shark's six-fan Air Purifier 6 was a big, powerful tower. You can still buy its filters from Shark, but not a new unit on Amazon. Here is what owners and shoppers should know.
The M10+ is Temtop's current M10: a cheap, battery-friendly e-ink monitor for CO2, particles and VOCs. It is a sensible bedroom or desk monitor; just do not expect lab-grade numbers.
The EVDC500 is an evaporative humidifier, so no white dust, with two 1-gallon tanks and a frugal DC motor. It suits a living room or open-plan space better than a nightstand.
Winix's 5500-2 was the default mid-size purifier for years. Its replacement, the 5510, keeps the thick carbon filter and adds Wi-Fi. Here is what the certified numbers say.
The AM90 is Winix's taller Wi-Fi tower. Its certified airflow matches the 5510, but its carbon filter needs replacing four times as often, and Amazon has had it out of stock.
