SEPL– Hood type terminal HEPA filters are supplied with Mini pleat HEPA filter with circular connecting duct collar with air diffusion plate at air inlet side. It is light weight compared to normal HEPA filter with plenum box. Supplied in 2 face size : 1) 4’L X 2’W, 2) 2’L X 2’W in 2 depths 110 mm and 135 mm. Collars are supplied in two sizes- 250 mm Ø and 305 mm Ø.