... ), pressure lock and automatic door closer are equippedWall panelEPS with double-ply plate, tongue and groove construction, thickness: 50MM EPS, roof ... intake air, aluminium alloy frame, coated steel.Intake fan1 double-intake centrifugal fan,7.5KW motor, air capacity:21000m3/hExtract ... fan1 double-intake centrifugal fan,7.5KW motor, air capacity:21000m3/ ...