Devola 100mm Gravity Grill, White - DVGG100W
Product description
- Airflow operated gravity shutter is a rain and weatherproof vent finished in white colour. The item is made from premium quality plastic. The overall external dimensions of the grille - 155 mm x 155 mm with 4" 100mm dia duct connection size for outdoor use.
- The grille has three non-return gravity flap outlets. The shutter works by extract air opening the blades to allow air to pass. When the extractor fan or ventilation system is not in use, the grille shutter flaps close automatically. This is designed to protect your ventilation duct from unpleasant odours, noises and to prevent backdraught air or rain penetration, and entry of objects, or vermin when the ventilation unit is not in operation.
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