THINKFR33LY

THINKFR33LY t1_j5j8iio wrote

They're not fully efficient down to -15. They can produce heat all the at that temp, but they're going to use much more power than at 30f for example.

I have the newest bosch heat pumps. With oil at $4 and electrical at north of 45c with delivery fees, a heat pump with a cop of 3 or so is more expensive than oil with sub freezing temps outside.

The most efficient Mitsubishi mini split might extend that down to the 20s, but def not -15.

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THINKFR33LY t1_j5hamxw wrote

Heat pump won't be cheaper than oil unless the temps stay in the 40s+, and that's with a brand new heat pump. Electricity is north of 33c/KwH... crushes the value of a heat pump.

I switched my cut over temp to 45f. Anything lower than that and I'm using oil, which right now is a big north of $4/gallon.

As others have said... solar and insulation. Not much else you can do. I did switch to Constellation as my provider, which helps.

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THINKFR33LY t1_izq6yrr wrote

Heat pump probably won't help.... in MA, electrical rates were high enough to make even thr most efficient heat pumps more expensive than natural gas.

Now, both energy costs have soared... but I'd bet it's even worse now. I have heat pumps and oil furnaces and currently it's cheaper to use oil (@4.25/gallon) than the heat pumps at over 40c/kwh!

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