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Hello great people of heating help.
I have a first world dilemma. I have both steam heat (gas) AND fancy new Mitsubishi hyper heat minisplits. I got the splits for AC but the hyper heat model was the same price due to state rebates so thus the upgrade. Boiler is 15 years old and probably not that efficient but works fine.
I live in New England. I suspect both systems can adequately heat the house and haven’t turned on the boiler yet this year. Does anyone have a good rule of thumb for when it makes sense economically to switch over?