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BeltfedOne OP t1_j1kl0jq wrote

They recommended a heat strip in the air handler for when the heat pump can't work efficiently. I am glad that I had them put it in.

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drxdrg08 t1_j1ku8c8 wrote

> for when the heat pump can't work efficiently

Not exactly. Heat pump efficiency is related to outside temps. It's gradual. The colder it is, the less efficient it is.

Heat pumps are sized for the space they need to heat. Installers can undersize a heat pump unit and you'll need to run electric strips when it's 40F outside. And they can size it so large that it will heat your house to 90F when it's -10F outside without any heat strips.

On top of sizing, newer heat pumps just work much better in extreme colds. Newer is better in this case.

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