Kair Brown Gravity Grille 155mm External Dimension with 125mm - 5 inch Round Rear Spigot and Not-Return Shutters - Ducting Air Vent

Product description

• Brown Plastic Ducting Air Inlet Air Outlet with Gravity Shutters. 155mm x 155mm external dimension with 5 inch 125mm round male rear spigot on the back of the grille for indoor or outdoor use.
• Non-return shutter flaps close automatically when not in use. Stops unpleasant odours, noises, or draughts flowing back through your duct. Gravity flap - no need for springs that could break.
• Easy to install, just push-fit duct and fittings together. Perfectly suited Bathroom or Kitchen extractor fan, Hydroponics fan, or In-Line Extract Fan.
• This grille can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive ventilation, positive input, air conditioning, HVAC, and Heat Recovery Systems.
• Suitable to use in compliance with Part F Building Regulations. Airflow performance independently tested by BSRIA or BRE. Free Air 11,600mm2. Static Pressure Drop in Pascals 15 l s 6.43 Pa - 30 l s 9.91 Pa - 60 l s 11.25 Pa.