4" Inch Back Draft Blocker, Backdraft Damper Dryer Vent Hose, Inline Extractor Fan Vent Back Draught Shutter

$2.50

$9.95

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Perfectly suited for ducting your Bathroom or Kitchen extractor fan, Hydroponics, In-Line Extract Fans, or Cooker Hood, Prevent cold air from entering your home through the dryer vent with our inline dryer vent draft blocker
Comes with balanced damper fully assembled, stops unpleasant odours, noises, or draughts flowing back through your duct
This backdraught shutter can be used as a part of a long duct run for a variety of purposes including whole house ventilation, passive stack vent, air conditioning, positive pressure, Tumble Dryer Venting, HVAC, and Heat Recovery Systems
White Plastic Extractor Fan Backdraught Shutter - Male Spigot - Diameter: 3.93" Inches.
Compatible with 4" Inch diameter ducts or vents. Easy to DIY!

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