I haven't used this forum before so thank you in advance to any help that can be provided! I have increased the size of a box room and building control (Edinburgh) have requested a centrifugal type fan due to the ducting length and as it is extracting it also needs to provide 10,000mm2 trickle ventilation. Has anyone does this before and able to suggest a product which would work? The room dimensions are 3099x2205mm with a ceiling height of 3116mm. Thanks!
The trickle ventilation is a 14 millimetre gap under the door and a trickle vent in the window of the room the door opens into. The fan can be chosen from the Screwfix website.