Can an air-to-water heat pump replace a gas boiler to supply hydronic baseboard heaters?
Because of my GBA subscription (and I guess my enthusiasm for the topic) people sometimes ask me green building technology questions that are well beyond my limited knowledge. Recently a friend referred a family member to me with the question below. Hoping folks here might have answers. The family is in Climate Zone 4C.
Right now we are using a Burnham Series 2PV gas boiler to heat hot water that we push through hydronic baseboard heaters, which are divided into three zones (one for each floor of the house). According to the labels (attached photos) the burner has an efficiency of 81.8%, an input of 130,000 BTU/hr, a max heat of 250F, and max pressure of 50 PSI. Based on our gas bill, we use about 130 CCF of natural gas/month to heat our house in the coldest months (December – March).
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