Question by Matt O: can you use an electric on demand water heater for radiant floor heating?
My only option is electric and was going to use a regular hot water tank but was wondering if it is possible to use an electric on demand water heater?
Best answer:
Answer by doG the mighty
that would be a HUGE waste of water.
get a pump, an inline heater, and enough pipe / tubing to do the job.
this will recycle the water
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5 Comments
an on demand heater also relies on water flowing through the heater and there are no connections for a return feed another thing is the cost of running that type of system will be very high and the same applies if you use the hot water tank method (megaflow) the running costs will be extremely high
SEISCO.com
seisco makes a wonderful unit for both domestic water or radiant floor heat and they are very reasonable I’ve put whole sytems in slab for under $ 3,000.
Yes! And several companies make electric heaters for that purpose. You will want to make it a closed system, with a feed valve, air scoop, pump. Make sure the unit is sized right and you will be OK. There are several sites you could get a piping diagram from. Good luck! Ck out, stiebel eltron company. Kind regards!
Just use the underfloor electrically powered heating wire for this. It will be about half the cost of hot water if you are just heating a room or two.
Make yourself a closed loop system with no connection to the potable water system. With a circulating pump controlled by a thermostat you should have no trouble with an inline heater as long as the flow switch works and the output temp. is safe for your tubing. An expansion tank would be a bonus and use glycol if you’re in an area subject to freezing.