Is it worthwhile preheating the cold water supplying a domestic water heater?
I will be building a new home this year in northern Ontario, Canada. The intention is to build a very efficient home with high insulation levels. While I have the design essentially complete I still have not determined how to heat my house. The house will be south facing on a slab with a second storey, I am leaning towards radiant heat. Infloor on the main and radiant baseboards on the 2nd floor.
I am looking at using a well insulated storage tank for the heating purposes, if I was to run my cold water supply for the water heater through a coil in this tank prior to entering the water heater in order to help preheat it can it increase the efficiency of the water heater?
Would I be better to utilize an indirect domestic water heater using the boiler and a well insulated storage tank?
Would it be worthwhile to use a heat pump water heater for this application? Thanks
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