PuroAir

PuroAir 400

A from PuroAir, with HEPA (3-layer with pre-filter) filtration, rated for rooms up to 2000 sq ft.

Who this is for:Shoppers looking for a purifier suited to large living rooms and open-plan spaces. If odors, pet smells, or smoke gases are a concern, this model includes activated carbon.

Owners like this air purifier because it's good for pet hair and dander, it brings real allergy relief, and it clears odors and VOCs.

CARBAbout certifications

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Key specs

New to these numbers? Read What is CADR? and Decibels, translated

PriceiThe listed US price when we indexed this model. Prices move — check the retailer for today's number.$259.99

Room coverageiThe largest room, in square feet, this purifier can effectively clean — assuming standard 8-foot ceilings and 4–5 air changes per hour.Room size guide →2000 sq ft

Noise rangeiDecibels (dB) measure loudness on a scale where every +10 dB sounds roughly twice as loud. 20 dB is a whisper, 40 dB a quiet library, 60 dB normal conversation. For bedrooms, look for under 30 dB on the lowest setting.Noise guide →36 dB min

Filter lifeiHow long the manufacturer rates the filter to last under normal use. Running in smoky or dusty homes shortens it.Ownership cost guide →3 months

Filter costiWhat a genuine replacement filter costs. Divide by the lifespan to get the real monthly cost of ownership.Ownership cost guide →$64.99

WarrantyiThe manufacturer's warranty period. Longer coverage signals confidence in the motor and build.2 years

Who the PuroAir 400 is for

Specs only matter in context. Here's where the PuroAir 400 genuinely fits — and the trade-offs worth knowing before you buy. If you're deciding between this model and similar options, focus on the fit cards below: they highlight the specific use cases where this purifier shines and the situations where it falls short.

Keep in mindAudible in a quiet bedroomIts quietest setting is 36 dB — above the 30 dB most light sleepers need. Fine for living rooms and offices; light sleepers should plan on a hallway spot or a timer.
Good fitOdors, pets, and smokeAn activated carbon stage traps the gases a particle filter can't — cooking smells, litter-box odor, VOCs, and wildfire smoke gases.
Good fitSet-and-forget operationListed features include particle sensor, auto mode, sleep mode — handy for letting the purifier manage itself, though none of it replaces CADR headroom.
Keep in mindCADR is self-reportedThe PuroAir 400 isn't AHAM Verifide, so its CADR and coverage figures come from the manufacturer rather than an independent lab — treat them as a ceiling, not a promise.
Keep in mindFilters cost $21.66 a monthReplacement filters run $64.99 every 3 months — above average. Factor that into the price comparison before judging the sticker.

What owners say

7 recommendations

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5.0 out of 5 starsr/BuyAirPurifier
“The PuroAir 400 uses a medical-grade HEPA 14 filter, which captures 99.99% of particles, and has a smart sensor that adjusts the filtration based on air quality.”
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5.0 out of 5 starsr/BuyAirPurifier
“Yes, the PuroAir 400 includes an activated carbon filter, which helps absorb pet odors, cooking smells, and other household pollutants.”
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5.0 out of 5 starsr/BuyAirPurifier
“Compared to others, the PuroAir 400 stands out with its medical grade HEPA filter, which is more powerful than standard filters in many other models.”
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5.0 out of 5 starsr/BuyAirPurifier
“Yes, the PuroAir 400 HEPA 14 Air Purifier is a great option for large rooms up to 2,000 sq. ft.”
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5.0 out of 5 starsr/BuyAirPurifier
“I recommend the PuroAir 400 HEPA 14 Air Purifier. It covers up to 2,000 sq. ft., making it a great choice for large areas.”
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+ 2 more recommendations

The real cost of ownership

The sticker price is the down payment. Filters for the PuroAir 400 run $64.99 every 3 months — here's what that compounds to over three years of round-the-clock ownership.

Upfront cost$260

Filters · monthly$21.66/mo

Filters · annual$260/yr

3-year total$1,040

Upfront$260

After 1 year$520

After 2 years$780

After 3 years$1,040

Over three years, replacement filters add $780 to the $260 sticker — 75% of what you'll actually spend on the PuroAir 400.

Compare filter costs across models →

Compare with similar models

These alternatives share key traits with the PuroAir 400 — same brand family or similar room coverage. Compare their scores, owner sentiment, and specs side by side to see which fits your specific needs better.

Common questions about the PuroAir 400

Quick answers to the questions shoppers most often ask before buying. If your question isn't covered here, check the full specifications below or compare against similar models above.

What size room can the PuroAir 400 handle?It's rated for rooms up to 2000 sq ft.
Is the PuroAir 400 quiet enough for a bedroom?Borderline. Its quietest setting is 36 dB, above the 30 dB target for light sleepers — it suits living rooms and offices better than bedside duty.
What does the PuroAir 400 cost to own?Filters run $64.99 every 3 months — about $21.66 a month. Over three years that's $780 in filters on top of the $260 sticker, a $1,040 total.
Can the PuroAir 400 handle odors and smoke?Yes — its activated carbon stage traps odor and VOC gases while the HEPA (3-layer with pre-filter) filter handles the particles, which is the combination smoke and pet households need.

Full specifications

price usdiThe listed US price when we indexed this model. Prices move — check the retailer for today's number.: 259.99
dimensions: 14.4 x 8.1 x 21.5 in
weight lbs: 14.73
filter typeiThe particle filter grade. True HEPA captures 99.97% of particles at 0.3 microns; 'HEPA-type' has no standardized efficiency.Filter guide →: HEPA (3-layer with pre-filter)
model numberiThe manufacturer's exact model identifier — handy when comparing listings across retailers.: PuroAir 400
noise db miniThe quietest fan setting, in decibels. 20 dB is a whisper, 40 dB a quiet library — for bedrooms, look for under 30 dB here.Noise guide →: 36
carb certifiediCARB certification means ozone emissions stay below California's strict safety threshold.Certifications guide →: True
smart featuresiExtras like air quality sensors, auto mode, app control, and sleep modes. Nice to have — they don't clean the air themselves.Smart features guide →: particle sensor, auto mode, sleep mode
warranty yearsiThe manufacturer's warranty period. Longer coverage signals confidence in the motor and build.: 2
room coverage sqftiThe largest room, in square feet, this purifier can effectively clean — assuming standard 8-foot ceilings and 4–5 air changes per hour.Room size guide →: 2000
has activated carboniActivated carbon traps gases, odors, and VOCs that HEPA filters can't catch — essential for smoke, cooking smells, and pet odor.Filter guide →: True
filter lifespan monthsiHow long the manufacturer rates the filter to last under normal use. Running in smoky or dusty homes shortens it.Ownership cost guide →: 3
filter replacement usdiWhat a genuine replacement filter costs. Divide by the lifespan to get the real monthly cost of ownership.Ownership cost guide →: 64.99