How to harness waste heat from a gas hot water system?
So much waste heat blows out of a vent at the top of it, I want to harness this somehow but there is a sign on it that says specifically not to cover it.
I was thinking about building a box type arrangment on top of it to use for drying clothes. Even beter would be a way to use it to heat the house as it is winter here in melbourne and freezing cold but.
It seems like venting and flow is a bit of a complex subject. Anybody with any expertise here?
(Edit: I have decided not to go ahead with this project as the amount of heat the water heater emits on standby isn't enough to worth bothering with. Thanks to everyone for their replies)