About sd-in-cnb

Just a further thought: To lower your gas bill, what you need to do is lower the actual number of cubic metres of gas used (you can see this on the meter near your gas tap, usually on the side of the house). You might be able to track down whether the heating or hot water is using the most gas by writing down the number on the meter each day for a couple of days when you use the heating, and each day for a couple of days when it's cold but not quite cold enough to turn on the ducted heating. The ...

Your gas usage is metered in cubic metres. A cubic metre of natural gas (mostly methane) usually produces about 38 MJ of energy for you when it is burned, in standard conditions. Natural gas can contain up to 7% of other gases that are not burned (eg a bit of carbon dioxide and a bit of nitrogen), effectively non-fuel. But the AEMO assumes it's more typically around 3%. So the heating factor isn't something that can be changed or lowered (except by natural variation in the gas source itself), th ...