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Hot water and underfloor heat
Ok. Hopefully this isn't lengthy. My apologies. So. We have water underfloor heat in a place we recently bought. It has a wall thermostat downstairs. The main furnace thermostat is upstairs. The underfloor heating system runs from the same hot water tank we use for the whole house. I'm trying to figure out how the underfloor heating affects the hot water tank as every once in awhile, we will have no hot water. Does the underfloor system suck it out every so often? And installing a separate system to control the underfloor heat is not an option. I'm just trying to understand what happens. Thanks. The hot water tank is gas.