Restore indoor air quality in light industrial settings, universities, schools, hospitality venues and healthcare environments by removing harmful allergens and mold spores - especially important for allergen-sensitive or immune-compromised occupants. When used with the optional DOP 2nd stage filter, the HEPA 500 provides assurances for first-pass filtration. The optional Activated Carbon Filter allows users to quickly and effectively attack smoke and other noxious odors in the environment.

DefendAir HEPA 500 Filtering Options

Features & Benefits

  • Advanced filtration technology
  • Daisy chain capability - link up to 3 units on 1 power outlet
  • Variable CFM on each unit - up to 1500 CFM per 15-amp circuit
  • Stackable, lightweight, and easily transportable


Model F284
Amperage 3.0 
Dimensions (H × W × D)  24.6 × 26.2 × 18.2 in.
62.5 × 66.5 × 46.2 cm
Power 115V / 60 Hz
Duct sizes  Intake: 12 in.
Outlet: 8 in.
Use weight  44 lbs | 19.9 kg
Air movement 250 CFM (min.), 500 CFM (max.)
Filter system  2-stage
Primary filter HEPA filtration technology
Pre-filter Standard paper pre-filter (two grades), plus plus Activated Carbon Filter and DOP filter options.
Daisy chain  Plug three units together – provides up to 1500 CFM
GFCI  Outlet protected
Power cord length  25 ft. | 7.62 m
Speed  Variable from 250 CFM to 500 CFM
Filter change light  Indicates when primary (HEPA) filter needs to be changed
Housing  Rotomolded polyethylene
Safety marks UL/C-UL Listed

DefendAir® HEPA 500
Portable air filtration for cleaner air

Help occupants breathe clean air by filtering out harmful organisms, allergens and construction dust with the HEPA 500 air filtration unit. It uses HEPA filter media with an efficiency rating of 99.97% against 0.3-micron oily aerosol particles.