Hi, only just registered a minute ago because I need some help. I want to put a home made wood heater under our house and need to put the flue through the outer wall. It is a single storey brick veneer house of about 1971 vintage. I have the skills to do this myself but would like to know what I can read that will explain what needs to be done to maintain fire ratings etc. I live in Tasmania. Please email me as that is faster than me trying to trowel my way through all the forum contents. Help!