... made by customers. 2rows of grids 3D liftRampNo emergency door2 pcs emergency door with pressure lock Front door4pcs of front door ... ,circular heating,chimney at front 3.Filtration system Roof filter16 pcs of filter,mounted above support frame,which is made of ... steel and powder coated Floor filter2 pcs Air mouth filter2 sets,2 pcs.M style before intake and exhaust fan ...