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House heating using solar 6 darrynm 5 years
Heat pumps for hot water in cold climates 14 Bushwalker 8 years
Should I buy a Solar Hot Water System or a Solar Electricity System ? 15 Greg C 9 years
[Actuarial] COST/BENEFIT analysis of Solar HWS (in Melbourne) - SKEPTICAL view? - 2 37 ghostgum 11 years