Plenum housing is twenty gauge steel, finished with a baked powder coat paint finish. All seams and penetrations are sealed air tight with cleanroom compatible sealant.
Prefilter: Phantoms are equipped with a minimum 20% efficient pleated prefilter, rated per ASHRAE standard 52-76. Size: 20”x 20” x 1”. Final Filter: Final filter is HEPA type 99.99% efficient on 0.3 micron particles. HEPA filter frame is fabricated of anodized extruded aluminum. Grille is anodized aluminum, containing a small round perforated pattern, integral to the filter frame assembly.
Blower is direct drive, forward curve centrifugal type. Motor is 1/4 H.P., 115 volt, 1 phase, 60 Hertz, rated @ 3.8 amps operating at 950 rpm. The motor is a permanent split-capacitor type with internal thermal overload protection.