Round NRD " Back Draught Damper "
The Non Return damper is unique in that when air flows out of it gravity is the only source by which the backdraft damper closes and prevents contaminated air to filter back through.
لا توجد تركيبة صحيحة لهذا المنتج.
The Non Return damper is unique in that when air flows out of it gravity is the only source by which the backdraft damper closes and prevents contaminated air to filter back through.
