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Boiler sizing based on Heat Loss Calc and Length of baseboard
I am an average homeowner who has been researching boilers and hot water heaters for over a month and close to a decision to replace an old tankless oil burner. I am seeking feedback from the 'The Wall' on understanding the connection between the results of a heat loss calculation and the length of cast iron base board in the house. The heat loss calculation was 85,274 BTU. Some installers say that the 123.3 ft. of cast iron baseboard and 20' of sheet metal baseboard in the house can only put out about 66,000 BTU of heat and the new boiler should be sized at that size. Which view is more accurate? The old boiler is a Burnham Jubilee.