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Heat pumps in winter

What happens as the temperature drops

The honest version, without the sales gloss: what a modern heat pump does at each stage of a Spokane winter, and where backup heat belongs.

Outdoor temperature

Spokane's coldest design mornings sit near single digits. Most of the winter is warmer than people remember.

What to expect

Normal heating

The heat pump does the work on its own and runs long, steady cycles. This is where it is most efficient.

  • Long run times are normal — short blasts are not the goal
  • Air from the registers feels cooler than a furnace, and that is expected
  • Keep the outdoor unit clear of snow and ice
Four things worth knowing

Before you decide on a system

  • Defrost is normalEvery so often the outdoor unit reverses briefly to melt frost off the coil. Steam and a few minutes of cool air are part of the design, not a fault.
  • Cold-climate models existModern variable-speed heat pumps hold far more of their capacity in the cold than the units people remember from the nineties.
  • Backup heat is a design choiceElectric strips, an existing gas furnace as a dual-fuel pair, or a bigger cold-climate unit — each has trade-offs, and we lay them out.
  • Sizing matters more hereA system sized for a mild afternoon will not hold the house at 5°F. We size from the heating load, not from the old unit.

Dual fuel, plainly

If the house already has a gas furnace, pairing it with a heat pump gives you efficient heating most of the winter and the furnace for the coldest mornings. The changeover temperature is a setting, and where it sits depends on your rates — we set it with you rather than leaving it at the factory number.

If there is no gas, the conversation is about a cold-climate heat pump and how much strip heat, if any, it needs behind it.

A gas furnace and an indoor coil installed together in a basement