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Convert gas hot water heater into hot water heating system?
My brother has a gas hot water heater which he would like to
convert over to use as part of a hot-water radiator system. Any suggestions, caveats, ideas? Such as: does the return water go to a holding tank and the system pump then pumps the water out of it, through the hot water heater, and then through the house? Or does the pump go AFTER the water heater and then pump to the house? Does the make-up water go into the holding tank to maintain level? Rick |
kelvin_cool_ohm wrote:
My brother has a gas hot water heater which he would like to convert over to use as part of a hot-water radiator system. Any suggestions, caveats, ideas? Such as: does the return water go to a holding tank and the system pump then pumps the water out of it, through the hot water heater, and then through the house? Or does the pump go AFTER the water heater and then pump to the house? Does the make-up water go into the holding tank to maintain level? Rick Yes, it's fairly common to use a single heater for domestic hot water and a Hydronic heating loop. No holding tank is required. City water pressure (thru a pressure reducing valve) can maintain system pressure at all times. The heater should have a small expansion tank on it. A circ pump is used on the cold *return* side to the bottom of the heater. The pump can be controlled by a room thermostat. GOOGLE around for combination water heater / space heating or similar. If Codes are an issue where you live, get input from the inspector first. Jim |
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