Two fan settings and cool-down mode

single ply media is heat-sealed to a heavy gauge metal support frame and forms a self seal when installed

tubular steel lifting carriage

schedule 80 steel pipe and is wrapped with a thick foil blanket insulation that  keeps cabinet walls cool to the touch

Graco GH230 PRO

IWATA 93719530 Air Valve Spring Mi-t-m CA-2703-1MMK Two fan settings and cool-downSpare Parts for W 400 LPH400 (REPLACES PART# 03719530) #7 93719530 AIR VALVE SPRING