This is the replacement filter cartridge for the PuroAir 400 air purifier. It uses a three-layer design: a pre-filter for dust and pet hair, a HEPA layer rated to capture particles as small as 0.1 microns, and an activated carbon layer for odors, smoke and VOCs. It suits PuroAir 400 owners who want to keep the purifier's filtration performance up rather than switch machines. The 90-day replacement guidance matches what most HEPA purifier makers recommend, and the filter is a direct-fit part, so there is no cutting or adapting. Buyers rate it highly, and the main trade-off is the recurring cost of swapping it several times a year.
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Owners rate it very highly and describe it as an easy, correct-fit swap that keeps their PuroAir 400 working. Most mention cleaner air and reduced odors after changing it.
This is a replacement filter made for the PuroAir 400 Air Purifier. It captures small particles, including dust, pollen, pet dander, and smoke, and it reduces odors and VOCs.
The filter has three layers. The pre-filter catches larger debris such as dust and pet hair, which helps extend the life of the other layers. The HEPA layer filters particles as small as 0.1 microns. The activated carbon layer filters odors, smoke, and VOCs.
The filter should be replaced every 90 days. Areas with higher pollution, such as during wildfire season, may need more frequent replacement. Fel d 1 and pollen removal was tested in an ISO 17025 certified lab.