Removes staining dirt from the air as measured by the Dust Spot Method using atmospheric dust; refer to the American Society of Heating, Refrigerating, and Air Conditioning Engineers Standard 52.1-92.
Three-speed motor-driven fan circulates up to 1030 cfm (1750 cu m/hr) on F57A, up to 485 cfm (714 cu m/hr) on F57B.
Solid state power supply is self-regulating and maintains peak efficiency during a wide range of cell dirt-loading conditions.
Interlock switch prevents operation when the grille is open.
Heavy duty commercial cells and prefilter are removable for cleaning.
Air vent provides dilution of gaseous contaminants.
Provides Coanda air distribution by drawing in dirty air, cleaning it electronically, and recirculating the clean air in four directions throughout the space.
Test button shows the presence of high voltage.
Light emitting diodes (LED) indicate ON and CHECK; the WASH LED is optional.