Browse Forums Heating, Cooling & Insulation 1 Feb 27, 2020 7:43 pm I am trying to find a place for my return air that is out of the way. I've found a spot that backs onto a bedroom wardrobe. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ There is about 400 mm of space for the return air box. The current size of the box that was already in the house is 600mm x 400mm. The diameter of the duct is 350mm. Because the diameter of the duct is only 350mm, is it necessary for the box to be any bigger? My thinking is that if the duct only has space for 350mm, then why is a bigger box necessary? DIY, Home Maintenance & Repair Hi everyone Question about Brevis gas heating undergound - was recently installed by previous owners (<1 year old) but live in a relatively large house - 4 bdr - and only… 0 5660 DIY, Home Maintenance & Repair Hi, recently a replacement rangehood was installed at my home and the installer cut holes through the double brick wall for the duct but left quite some damage to the… 0 2432 Building Standards; Getting It Right! 1. optional, you can but normally just use the earth from the main switch board 2. should be enough but the distance determines voltage drop - sparky should work it… 1 29134 |