Dri-Eaz Pre-Filter CFM400 for DefendAir 400 Air Scrubber (113402)

Genuine Dri-Eaz replacement pre-filters for the Dri-Eaz DefendAir 400 Air Scrubber. This includes a pack of five pre-filters. Replace the pre-filter whenever dust accumulation is visible; it should not be reused. It is important to replace the prefilter often when used in dusty environments to preserve the life of the HEPA filter. When used for remediation projects, change the filters after every job and dispose of them properly.