Mechanicals for a well insulated house
I am looking for the most cost effective heating,ventilation,hot water strategies for a medium sized house with r-30 walls, r -60 cielings in western Ma.
Which ends up being more economical, on demand gas hot water or solar with gas backup?
How cost effective is heat recovery?
I have heard of a unit that combines boiler, hot air,ventilation,hot water in one unit, has anyone used one?
Are there books or articles I should read?