We're planning to open up a fireplace in a bedroom and have a DFE gas fire fitted - low power (4.5kw) as it's just for effect rather than much heat. I know because it's < 7, it normally wouldn't need an air brick, but are there any special rules about vents because it's a bedroom - a builder I know thought so, and no doubt the gas fitter will tell me when he comes, but I'd like to know for sure. Also, are there any other specific rules about gas in bedrooms?