I have a Grunaire 4-zone heat pump that I installed a couple months ago and we're pretty happy with it. I'm about an hour north of Philly and have a 90 yr old brick house with original windows with storms.
One floor was heated with hydronic oil, top floor was heated with electric baseboard. I haven't run either since I installed the mini-split and my electric bill has been lower then last year, even though average temp has been lower. If I continue to use no oil throughout the year I'll save about 500 gal ($1500+) this winter plus cheaper electric.
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