1.Simply DIY. Offers anti-overpressure flap, and fit in between all-plastic air duct, flexible duct system. For use in applications; Home ventilation kitchens, toilets bathrooms & hydroponics.
2.If you need to use STOP odors, or if you have 2 or more suction fans, flows back in the same air ducts connected. Perfect for your bathroom or kitchen exhaust fan, hydroponics, inline extract fans, or extractor hood.
3.This backflow damper can be used as part of a long air duct for a variety of purposes including whole house ventilation, passive stack vent, positive pressure, dryer, air conditioning venting; HVAC and heat recovery systems.