PUROAIR 400 HEPA AIR PURIFIER Compatible with the PuroAir 400 Replacement Filter

The PuroAir 400 Air Purifier has several benefits that make it a best-in-class indoor air cleaning solution for improving indoor air quality.

Effective Air Filtration

The PuroAir 400's multi-stage filtration system, which includes a HEPA filter and activated carbon filter layer, effectively filters small particles like dust, pet dander, and pollen, as well as neutralizes odors and harmful gases like VOCs. This makes it especially beneficial for those with allergies or sensitivities to air quality.

Cleans Medium to Large Spaces

Designed to cover larger rooms up to 2,000 sq ft*, the PuroAir 400 is ideal for both residential and commercial spaces, providing efficient air purification for open-concept homes, offices, and more.

Quiet Operation

The PuroAir 400 operates quietly even at higher fan speeds, making it perfect for bedrooms or workspaces where noise can be a distraction.

Energy Efficient

With its energy-saving design, the PuroAir 400 consumes relatively low power, which means you can run it continuously without worrying about energy bills.

User-Friendly Features

PuroAir Air Purifiers are equipped with user-friendly controls and a smart air quality sensor that automatically adjusts fan speed to maintain optimal air quality. The air filter replacement indicator ensures you'll always know when it's time for a fresh filter.

Improved Air Quality

The 400 Air Purifier enhances overall air quality, promoting healthier breathing and better sleep for greater comfort at home. These benefits are especially valuable for people in high-pollution areas or those who spend a lot of time indoors.

Portable and Stylish

The lightweight and contemporary design of the PuroAir 400 complements most home decor, and its portability allows you to easily move it to any room that needs air purification.

Safe for Pets

Pet owners can also enjoy fresher, cleaner air with the PuroAir 400, as it minimizes pet dander, fur, and odors.

Struggling with allergies, pet dander, or simply craving cleaner air? The PuroAir 400 is your solution for a healthier home and improved well-being. Experience the fresh air difference today!

Genuine PuroAir 400 Replacement Filters

Your PuroAir 400 Air Purifier’s power starts with its filter. Genuine PuroAir 400 replacement filters maintain the 400’s designed airflow and seal integrity, ensuring optimal HEPA and CarbonTechTM activated carbon performance for consistent, high-efficiency filtration.

What Makes PuroAir Replacement Filters Different

3-Layer Filtration System

Pre-Filter
Filters larger particles like dust³, lint, and pet hair before they reach the main filter. This first layer helps extend the life of your HEPA filter and keeps airflow strong for consistent purification performance.

HEPA Layer
Filters up to 99.9% of common indoor pollutants1 like pollen4, pet dander4, smoke4 particles, and fine dust3.

CarbonTech™ Activated Carbon
Helps reduce odors1, smoke4, and household VOCs5 from cooking, pets, and cleaning products.

How Long Does a Filter Last?

For best results, replace your filter about every 90 days or 3 months. Regular replacement helps maintain:

• Strong airflow
• Peak purifier performance
• Better odor control
• Consistent filtration efficiency

Usage, pets, smoke, and indoor air quality may shorten filter life.

Easy to Replace

Changing your filter takes just minutes:

1. Remove the old filter
2. Remove the plastic bag from the genuine PuroAir 400 replacement filter and insert into the PuroAir 400 air purifier
3. Reset your filter indicator (if applicable)

No washing. No mess. No complicated setup.

Not Washable

PuroAir filters are disposable by design. Washing can damage the HEPA and CarbonTechTM activated carbon filter media and reduce performance. Always replace instead of reusing.

Cost Per Month

Replacing your filter every 90 days helps break the cost into a simple monthly expense for cleaner air and better performance.

Want to save more? Join the subscription program for:

• Save up to 25% on filters
• Free shipping
• Filters delivered on time
• Lifetime warranty with active subscription
• Rewards on every order

Why Choose Genuine PuroAir Filters vs. Knockoffs

Genuine PuroAir Filters

• Designed specifically for PuroAir purifiers
• Proper seal for better airflow
• Verified HEPA + carbon performance1
• Stronger odor and VOC5 reduction
• Built to last through the full replacement cycle

Generic Knockoffs

• Poor fit may allow air bypass
• Lower-grade materials
• Weak carbon layers
• Faster clogging or breakdown
• Inconsistent results

A low-cost generic filter can cost more in reduced performance, weaker airflow, and more frequent replacements.

Keep Your PuroAir 400 Purifier Performing Its Best

Fresh filter. Strong airflow. Cleaner air. Choose genuine PuroAir 400 replacement filters.

PuroAir 400 User Manual