My house is old and has radiator heat, which is heated by a gas furnace from which the hot water is pumped through 7 radiators and back in. Hypothetically, and by no means would I ever want to do this to my system, if gas became unavailable in my area, would it be possible for me to adapt a regular electric water heater and mount a pump nearby to circulate water through the system like the present one does with gas?
Another way to ask is, what if I were designing a radiant hydronic floor heating system and my only source of energy were electric. I'm sure there are specialized heaters for that purpose that have a pump built in but, if I wanted to make my own (for experiment's sake), could I do it with a regular electric water heater and a pump?
At first thought, I don't see why not and I think the most complicated part would be designing a
wiring control that works with the thermostat and connects the
heater and the
pump. I'm asking this primarily to understand the visceral concepts of heating and associated devices. Of course, unlike with a residential water heater that has open inlet for new water to come in, in this case it would have to be on a closed system which itself has a fill valve and a backflow adapter.