Recent content by bobbob

Hello COG, thanks for that reassuring note. I need about 20 sq.in so i guess a 6in diameter duct should do (5in at a push) any idea where I can get some suitable grills which will connect straight onto a duct - preferably white for the inside and brown for the outside ?

I need to provide some combustion air into a utility room that houses an oil boiler with an open flue. I would prefer not to install an air brick as I would like to eventually replace the boiler with a room-sealed type. As this is a bungalow would it be acceptable to provide some form of...