Heat-pump water heater vs. instantaneous water heater
New member and my first question! I’ve been following blogs, become a fan, and I’m on board/planning to build with exterior rigid board, using a mini-split, and concrete floors for mass.
I’d like to use some in-floor heat in baths/kitchen ONLY. Was considering domestic hot water from instantaneous propane water heater, using loop off same for in-floor. Reading FHB 7/2010 article by Sean Groom on HPHW (heat pump hot water heaters), I’m wondering feasibility of using one of these, with projected C.O.P. of 3-5, as my domestic/in-floor heat supplier. Disregarding storage issue, it would seem that just a C.O.P. 2 would be a wash between propane/electric !?
If I ran a PEX loop to garage and installed HPWH there, it would keep it from freezing, save the 50 db compressor noise out of the house, and spare me a vent issue of the propane hwh from home’s insulated envelope.
Any thoughts? Thanks ahead of time!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part