Cleaner Air Guarantee in 100 day Filter Included
PuroAir 400 Air Purifier and 4 replacement filters
PuroAir 400 Air Purifier and 4 replacement filters
4.9
Rated 4.9 out of 5 stars
286 Reviews

Gifting 400 Bundle

$521
$575 $521
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Take clean air to the next level with the PuroAir 400 Air Purifier plus 4 replacement filters, a full 15 months of coverage for larger spaces. Covering up to 2,000 sq ft1, this bundle is ideal for classrooms, conference rooms, teacher lounges, family rooms, and other shared spaces where clean air matters most.
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  • plus sign iconFilters up to 99.9% of pollutants
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Product Description

Breathe easier in bigger spaces this school year with the PuroAir 400 Air Purifier and 4 replacement filters. Delivering a full 15 months of clean air coverage.

Designed for classrooms, conference rooms, teacher lounges, family rooms, and open living spaces, the PuroAir 400 combines high-powered performance with quiet operation. With up to 2,000 sq ft1 of coverage, it’s the perfect solution for keeping the air fresh and healthy in large, shared environments.

What’s Included

  • 1 × PuroAir 400 Air Purifier (includes one filter)
  • 4 × Replacement Filters (15 months of coverage)

Key Features

  • Extra-Large Coverage: Cleans up to 2,000 sq ft1, making it ideal for classrooms, common areas, and large rooms
  • 3-Stage Filtration: Pre-filter, advanced HEPA filtration layer, and CarbonTech™ for odors1 & smoke4
  • Smart Auto Mode: Detects and adjusts fan speed automatically based on real-time air quality
  • Air Quality Sensor + Indicator: Instant feedback so you always know your air quality
  • Sleep Mode: Quiet operation for uninterrupted work, study, or rest
  • Family & Classroom Ready: Powerful yet energy-efficient design for daily use in busy spaces
  • Filters: Particulate matter (PM1, PM2.5, PM10) down to 0.1 µm, VOCs5
  • Reduces: Pet dander4, smoke4, pollen4, allergens4, dust3, odors1 and contaminants1

Specifications

  • Model: PuroAir 400 (includes one filter)
  • Room Size Coverage: Up to 2,000 sq ft1
  • Filter Life: Approx. 3–4 months each (4 filters = 15 months total)
  • Noise Level: As low as 31 dB in Sleep Mode
  • Dimensions: 14.4” H × 8.1” W × 21.5” D
  • Weight: 14.7 lbs
  • Warranty: 2 years with registration
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FRESH AIR IN MINUTES

Get real results in just minutes. Our scientifically backed purifier filters particles before they can reach your lungs.

relaxing on couch with microscopic air particles overlay
Before
relaxing on couch
After
*For illustrative purposes only.
PuroAir 400 Air Purifier Features Infographic

What's really in your home's air?

Allergens

Allergens

Sources:

Furry pets, dust mites

consequences:
  • Asthma
  • Reduced lung function
  • Cough
Annals of Allergy, Asthma & Immunology
Volatile Organic Compounds (VOCs)

Volatile Organic Compounds (VOCs)

Sources:

Cigarette smoke, recently dry-cleaned cloths, room deodorizers, paints, carpets

consequences:
  • Bronchial hyper-reactivity
  • Asthma
Wiley Online Library
Smoke

Smoke

Sources:

Tobacco smoke, vaping, incense, wildfires

consequences:
  • Premature mortality
  • Lung cancer
  • Coronary artery disease
  • Respiratory illness
National Center for Biotechnology Information
Mold Spores

Mold Spores

Sources:

Unattended plumbing leaks, leaks in building fabric, hidden food spills,

consequences:
  • Upper respiratory symptoms
  • Cough
  • Wheezing
  • Asthma
PubMed Central
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3 LAYERS OF DEFENSE

1

2

3

1

Pre-Filter

Filters larger particles like dust, hair, pollen, carpet fibers, and other visible debris.

2

PuroAir High Performance HEPA Filter

Filters up to 99.9%* of air pollutants including allergens*, pet dander and dust.4

3

Activated Carbon Filter

Proprietary blend of activated carbon designed to filter odors, smoke, gases, and VOCs.5

3 LAYERS OF DEFENSE

1

2

3

1

Pre-Filter

Filters larger particles like dust, hair, pollen, carpet fibers, and other visible debris.

2

PuroAir High Performance HEPA Filter

Filters up to 99.9%* of air pollutants including allergens*, pet dander and dust.4

3

Activated Carbon Filter

Proprietary blend of activated carbon designed to filter odors, smoke, gases, and VOCs.5

Comparison Chart:

Find the perfect Air Purifier or Bundle for your needs with the below comparison chart. Whether you would like cleaner indoor air quality at home, school or the office, we have you covered!

 
PuroAir 100i Smart HEPA Air Purifier

PuroAir 100i Smart HEPA Air Purifier

5.0
Rated 5.0 out of 5 stars
126 Reviews
Starting at $89
PuroAir Lite HEPA Air Purifier

PuroAir Lite HEPA Air Purifier

4.9
Rated 4.9 out of 5 stars
294 Reviews
Starting at $69.97
PuroAir 130i Smart HEPA Air Purifier

PuroAir 130i Smart HEPA Air Purifier

4.9
Rated 4.9 out of 5 stars
483 Reviews
Starting at $109
PuroAir 240 HEPA Air Purifier

PuroAir 240 HEPA Air Purifier

4.8
Rated 4.8 out of 5 stars
2,513 Reviews
Starting at $159
PuroAir 400 HEPA Air Purifier

PuroAir 400 HEPA Air Purifier

4.9
Rated 4.9 out of 5 stars
312 Reviews
Starting at $259
Sq Ft Coverage
550 sq ft 1
500 sq ft 1
600 sq ft 1
1,000 sq ft 1
2,000 sq ft 1
HEPA & CarbonTech™ Activated Carbon Filter
Whisper Quiet Sleep Mode
Low, Medium, High Fan Speeds
Air Quality Sensor
 
 
 
Auto Mode
 
 
 
App Enabled
 
 
 
Two Year Warranty
100 Day Money-Back Guarantee
 

Free Same Day Shipping

100-Day Cleaner Air Guarantee

Lifetime Warranty with Subscription

Live Customer Support

In partnership with the American Lung Association

Because when you can’t breathe, nothing else matters.

  • Dedicated to making cleaner air more accessible in homes and communities
  • Supporting research and education that drive real impact
  • Collaborating to raise awareness about the connection between air quality and lung health
  • Reinforcing our shared mission to protect every breath, everywhere
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4.9
Rated 4.9 out of 5 stars
Based on 286 reviews
Customers Talked About
Write a Review (Opens in a new window)
286 reviews
  • ER
    Edward R.
    Verified Buyer
    Reviewing
    PuroAir 400 HEPA Replacement Filter
    I recommend this product
    Room Usage Bedroom, Living room
    Air Quality Concerns Allergies, Dust
    Rated 5 out of 5 stars
    2 months ago
    Edward roberts

    Awesome filter. My company notices more than me. Cool!

    Was this helpful?
  • M
    Megan
    Reviewing
    PuroAir 400 HEPA Air Purifier
    I recommend this product
    Rated 5 out of 5 stars
    3 months ago
    5 Stars

    Love this purifier. Helps with oer dander, smoke, and some smells.

    Was this helpful?
  • LB Profile picture for Lisa B.google logo
    Lisa B.
    Verified Buyer
    Reviewing
    PuroAir 400 HEPA Air Purifier
    I recommend this product
    Room Usage Bedroom, Living room
    Air Quality Concerns Pet hair and/or dander, Dust, Viruses or bacteria
    Rated 5 out of 5 stars
    3 months ago
    Wonderful Addition to the House!

    Our son recently went through a bone marrow transplant, so when he moved home from the hospital we wanted to make sure the house was a healthy environment for him. So to be safe, we ordered one 400 model and 2 240 models. We have been so happy with them. They are quiet and clearly they are working! It brings us peace of mind while our son continues to heal ❤️

    Was this helpful?
  • AL
    Amy L.
    Verified Buyer
    Reviewing
    PuroAir 400 HEPA Replacement Filter
    I recommend this product
    Room Usage Living room
    Air Quality Concerns Allergies, Dust, Odors
    Rated 5 out of 5 stars
    1 month ago
    Purified 400 HEPA replacement filter.

    Very pleased with the operation of the filter

    Was this helpful?
  • DP
    Donna P.
    Flag of United States
    Verified Buyer
    Reviewing
    PuroAir 400 HEPA Air Purifier
    I recommend this product
    Room Usage Living room
    Air Quality Concerns Allergies, Dust, Asthma, Mold, Odors, Viruses or bacteria
    Rated 5 out of 5 stars
    12 months ago
    Love it, the sound is

    Love it, the sound is so minimal, I can't even tell it is on.

    Was this helpful?
100 Day Cleaner Air Guarantee

Backed by our 100 Day Cleaner Air Guarantee

+ FREE 2 YEAR WARRANTY

We're absolutely confident that you'll adore your PuroAir! With our science-backed air purifiers and HEPA filters, we assure you that your home or office's air quality will be noticeably cleaner. And if by any chance you're not completely satisfied, we'll refund your money hassle-free. No questions asked! So, breathe easy knowing you're in good hands with PuroAir.

CLEAN AIR THAT PAYS YOU BACK

CLEAN AIR THAT PAYS YOU BACK

Every filter refill earns you 5% back. It is our way of rewarding you for keeping your air fresh.

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