Hybrid hot water heater for space heat and hot water in small A.D.U.
I am designing a 750 sq. ft. Accessory Dwelling Unit (A.D.U.). It will be well insulated with SIP panel construction, have extensive passive solar gain, and utilize a slab radiant heat system. There is extensive documentation on gas tank and tankless systems, but I would like to make an all-electric fossil-fuel-free house. We will use PV panels for most of our electricity, though we will be connected to the grid. I want to use a hybrid electric water heater to heat the home and hot water, likely in an open direct system with a timer to circulate fresh water in the tubing. We will have only one bathroom, no tub, and 1 low flow shower. Is there a reason this isn’t being done/won’t work? We will have a backup wood stove for the coldest snaps and could use a solar preheating unit, though I’d prefer not to so the system is as simple as possible. Opinions, Ideas? thanks
Sorry for leaving out geography. The house will be located in Reno, I have contacted radiantheat.com and they have suggested a theme tankless unit suited to space heating. Sounds like the hybrids don’t put out enough heat and are counter-productive.
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