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We got these http://www.cansolair.com/ mostly made from beer cans 6-7 hours per day in Candian winters they pump 130F air into the house fwith only a 75 watt fan for external power been trying to get a demo one, on the huge south facing wall (N Hemisphere) directly pointing at the local...

I think consultant is right, hot water is more efficient than pv, by huge amount, pv panels are still in development, using the power generated by a pv panel to heat an electric hws just seems very counter productive. 3KW heater elements in a HWS would need a very large number of 64W...

have seen advertised, an addon small pv panel and pump. the pump runs when there is light and therefore when the water is heating, automatically, no electricity, runs faster when there is more light, so the water always returns to the tank hottest. if a mains pump is used, the pump is very much...

For me the hardest part about repairing a thermostat on the hot water boiler was finding a 1 1/4 inch tube wrench to unscrew the old one, does sound like the vested interest thing plumber did the first one I saw, he was adamant about not replacing it, repair was 45minutes, and 'give me that...

The OP is STILL in Canberra, has No gas, No infinity, last house in Aus, laverton, killed off electric low pressure storage in roof, Rinnai mounted to the outide wall, aaaaaaaaaaaaaaaaaaaahhhhhhh,, 'kin fantastic and lower cost

got my info sheet back a heat pump can be air or ground air heat pumps lose as it gets colder ground heat pump works in air temperatures of minus 40C, (used here in the Frozen North to heat water and homes) either a vertical well is sunk ~200 feet down, a pipe is looped down and up the...