Blauberg Ventilation Solutions Perfectly suited for use with your Bathroom or Kitchen extractor fan, Hydroponics, or In-Line Extract Fan. Can be used as a part of a long ductwork run for a variety of purposes including whole-house ventilation, passive stack vent, positive input, air conditioning, HVAC, and Heat Recovery Systems.
This product would be ideal for installing in a ceiling mount location with a 4-inch diameter hole.
