The article doesn’t go into it, but a key advantage they have is that heat pumps move heat, rather then trying to generate it. So they can move a lot more heat into your house than would be generated by running the electricity they use through a resistor. This makes them effectively more than 100% efficient (the exact amount depends on temperature) as compared with burning a fuel or resistive heat.

  • HobbitFoot
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    9 months ago

    His point was that the guidance used by sales staff tends to be far higher than design guidance in building codes. Then, he proved the design guidance two different ways to show it worked with his home.

    And the design temperature of -12 °F used for testing is only 13 °F higher than the record low of -25 °F. If his system had to deal with a record low, it is still going to keep the house above freezing.