PuroAir 400 HEPA Replacement Filter Compatible with the PUROAIR 400 PURIFIER

A PuroAir 400 HEPA Air Filter is a replacement filter designed for use in the PuroAir 400 Air Purifier model. This filter features HEPA (High-Efficiency Particulate Air) technology, which is known for its ability to screen very small particles, as small as 0.1 microns. These particles include things like dust³, pollen⁴, pet dander⁴, and smoke⁴. HEPA filters are highly effective at improving air quality, especially in environments where allergies are a concern.

The PuroAir 400 also features an activated carbon filter layer that works alongside the HEPA filter layer and pre-filter to reduce odors¹, VOCs⁵ (volatile organic compounds), and gases, which boosts the overall air quality.

⁴Tested to remove Fel d 1 and pollen in an ISO 17025 certified lab.

The replacement air filters for the 400 Air Purifier effectively reduce a wide range of pollutants, including dust³, pollen⁴, smoke⁴, allergens⁴, pet dander⁴, odors¹, and VOCs⁵.

³Based on independent testing in an ISO 17025 certified lab on inanimate particles.

We recommend replacing your 400 air purifier filter every 2 to 4 months to ensure optimal performance. A clogged filter due to accumulated pollutants can reduce its effectiveness, and release pollutants back into your home.

However, you should consider replacing the filter sooner if you experience poor air quality caused by increased allergens⁴, wildfire smoke⁴, home renovations, or other similar factors. Inversely, air purifiers with minimal usage due to less pollution, you may only need to replace your filter every 6 months.

Enroll in our Subscribe and Save air filter replacement program and receive up to a 25% discount on all filter replacements, along with a lifetime warranty on your PuroAir purifier! Additionally, we'll simplify the ordering process by enabling you to schedule automatic filter deliveries directly to your home. Just choose your preferred delivery frequency, and we'll take care of the rest.

• Pre-Filter - Screens large particles such as dust³, hair, pollen⁴, carpet fibers, and other visible pollutants.
• PuroAir High Performance HEPA Filter - Filters up to 99.9% of air pollutants including, allergens⁴, pet dander⁴, dust³, and pollen⁴.
• Activated Carbon Filter - A unique blend of activated carbon that effectively clears out odors¹, smoke⁴, and VOCs⁵.

⁴Tested to remove Fel d 1 and pollen in an ISO 17025 certified lab.

The HEPA filter in your PuroAir 400 air purifier is designed to reduce airborne particles. However, as it does its job, the filter gradually accumulates these particles. Over time, these collected particles can build up, obstructing airflow and reducing the filter's effectiveness.

Regular HEPA filter replacements are essential for your PuroAir air purifier to function optimally and effectively filter airborne contaminants¹. Replacing the filter restores its ability to clear the air of harmful particles, maintaining a clean and healthy indoor environment.

The lifespan of a PuroAir HEPA filter is generally 3 months, or 90 days. However, you might need to replace it earlier if you experience poor air quality due to increased allergens⁴, wildfire smoke⁴, home renovations, or similar situations. Inversely, for minimal usage with less pollution, allergens⁴, or dust³, you may only need to replace your unit every 6 months.

PuroAir 400 Air Purifiers feature a filter replacement indicator light on the control panel that will illuminate when it's time to change the filter. Additionally, you can visually inspect the filter for excessive dust³ buildup or discoloration, which also indicates that it's time for a replacement.

No, HEPA filters should not be washed. Washing can damage the filter material and significantly reduce its ability to screen small particles that may not be visible to the human eye. To ensure your air purifier operates at peak efficiency and maintains optimal air quality, it is essential to replace the HEPA filter every 90 days or 3 months.

To learn more about the lifespan of a PuroAir air purifier filter, please read our helpful article: How Long Should You Expect Your Air Purifier Filter to Last?

PuroAir HEPA replacement filters are designed to fit specific PuroAir purifier models that have been rigorously tested. To find the right filter, locate the model number on your PuroAir purifier (e.g., 240 or 400) and make sure it matches the model number printed on the replacement filter packaging.

If you don’t replace the filter when needed, the 400 Air Purifier will become less effective at filtering airborne pollutants and allergens⁴. You may also notice that the air quality in your home declines and that the unit works harder, leading to increased energy consumption and potential strain on the motor.

⁴Tested to remove Fel d 1 and pollen in an ISO 17025 certified lab.

Replacing the filter is easy. First, turn off and unplug the 400 Air Purifier. Then, open the filter compartment and take out the old filter. Place the new PuroAir 400 HEPA replacement filter in the same position, making sure it's secure. Close the compartment, plug the air purifier back in, and turn it on. Finally, reset the filter indicator by holding down the button until the indicator light turns off.

Check out this helpful video and guide on How to replace your PuroAir 400 Air Purifier Filter.

Yes, PuroAir HEPA replacement filters also contain an activated carbon layer. This means they fight odors¹ and volatile organic compounds¹ (VOCs⁵), in addition to reducing airborne particles like dust³, pollen⁴, and pet dander⁴.

¹Based on independent testing in an ISO 17025-certified lab and typical residential ventilation rates. Results may vary. [See full disclaimer here.]

Yes, you can purchase PuroAir HEPA replacement filters and store them for future use. To maintain their effectiveness, store the filters in a cool, dry place, away from direct sunlight and humidity.

Join our Subscribe and Save program for the best savings on replacement filters! Enjoy automatic filter deliveries to your door, at your chosen frequency. You'll also receive up to 25% off every filter and a lifetime warranty on your PuroAir purifier.

PuroAir HEPA replacement filters can be purchased directly from our website or from trusted online retailers, such as Amazon. Always ensure you're purchasing from an official source to guarantee you're getting authentic filters for your 400 Air Purifier.

Generic filters may be available, but their effectiveness and compatibility with the PuroAir 400 air purifier are not guaranteed. PuroAir filter replacements have been thoroughly tested and confirmed to filter airborne particles as small as 0.1 microns¹ –700x smaller than a human hair! They include a pre-filter for large particles, a HEPA layer, and an activated carbon layer for odors¹, smoke⁴, gases, and VOCs⁵.

¹Based on independent testing in an ISO 17025-certified lab and typical residential ventilation rates. Results may vary. [See full disclaimer here.]

Yes, it is essential that you remove the plastic bag from the new replacement filter before placing it in your air purifier. The PuroAir 400 air purifier will not work properly and may cause the unit to malfunction if this step is skipped.