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
355 Reviews

GIFTING 400 BUNDLE

$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

4.9
Rated 4.9 out of 5 stars
367 Reviews
Starting at $99.99
PuroAir Lite HEPA Air Purifier

PuroAir Lite HEPA Air Purifier

4.9
Rated 4.9 out of 5 stars
446 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
530 Reviews
Starting at $119.99
PuroAir 240 HEPA Air Purifier

PuroAir 240 HEPA Air Purifier

4.8
Rated 4.8 out of 5 stars
2,703 Reviews
Starting at $179.99
PuroAir 400 HEPA Air Purifier

PuroAir 400 HEPA Air Purifier

4.9
Rated 4.9 out of 5 stars
381 Reviews
Starting at $279.99
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 355 reviews
Customers Talked About
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355 reviews
  • LL
    Leonard L.
    Verified Buyer
    Reviewing
    PuroAir 400 HEPA Replacement Filter
    I recommend this product
    Rated 5 out of 5 stars
    6 minutes ago
    Great product

    I will continue to use purpose so I can breathe clean air

    Was this helpful?
  • LT
    Linda t.
    Verified Buyer
    Reviewing
    PuroAir 400 HEPA Air Purifier
    I recommend this product
    Room Usage Other
    Air Quality Concerns Allergies, Dust, Pet hair and/or dander, Mold, Odors
    Rated 5 out of 5 stars
    2 days ago
    Best air purifier ever

    This is the best air purifier. I have one in my hall and after doing my hair in the mornings when I walk out of my bathroom, located in my bedroom and walk into the hallway it’s already red, cleaning the air.

    Was this helpful?
  • LF
    Lisa F.
    Reviewing
    PuroAir 400 HEPA Air Purifier
    I recommend this product
    Room Usage Bedroom, Living room
    Air Quality Concerns Allergies, Pet hair and/or dander, Dust, Cigarette smoke or similar, Odors
    Rated 5 out of 5 stars
    2 days ago
    Great for all

    Really like this it helps a lot with pet dander

    Was this helpful?
  • C
    Claudia
    Reviewing
    PuroAir 400 HEPA Air Purifier
    I recommend this product
    Air Quality Concerns Allergies, Dust, Asthma
    Rated 5 out of 5 stars
    2 days ago
    My kid has asthma.

    This has helped him sleep soundly at night .

    Was this helpful?
  • JC
    Joel C.
    Verified Reviewer
    Reviewing
    PuroAir 400 HEPA Air Purifier
    I recommend this product
    Room Usage Living room, Other
    Air Quality Concerns Allergies, Dust, Mold, Odors, Viruses or bacteria
    Rated 5 out of 5 stars
    3 days ago
    Amazing Air

    We bought this for our son and his family because breathing clean air makes a big difference! Having a baby (our first grandchild) is a big deal, too!

    This mighty purifier is giving us all peace of mind!

    Highly recommend this product!

    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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