Heat Pump Payback in Liberty Lake, WA
Should Liberty Lake switch to a heat pump?
In Liberty Lake, the extra upfront cost technically comes back, just not before the equipment wears out. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $5,500. That premium is recovered through $311 of lower running costs every year, landing the payback clock at roughly 17.7 years. Liberty Lake's own numbers say this pencils out only in theory, not in practice.
Compare against another city
This runs the same numbers for 3206 US cities, not just Liberty Lake. Look one up here.
The climate behind Liberty Lake's payback figure
Liberty Lake has a cold winter that leans hard on heating equipment, 5519 heating degree days a year against a 65°F base, and summers add a moderate cooling load, at 804 cooling degree days. -2°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of -8°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.65 on the cold-climate unit fit for this climate. A cold-climate unit is the right call in Liberty Lake, below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Climate figures trace to the nearest NOAA station, Felts Field Airport, 10.1 miles from Liberty Lake.
The yearly running costs in Liberty Lake
A 2000-square-foot house here would pull roughly 5,274 heating kilowatt-hours annually on top of cooling, totalling about $850 a year on electricity. The gas furnace it replaces burns roughly 57 Mcf a year at $17.62 per Mcf here, for a running cost near $1,161 a year including the old AC (electricity here runs 14.27¢/kWh). Priced as a standalone purchase, with a working furnace ripped out early, payback would take longer than the 15-year equipment life. Measured against the like-for-like replacement instead, a household here ends 15 years $833 behind.
What would change Liberty Lake's answer
This result holds unless electricity climbs above 20.6¢/kWh (it is 14.27¢ now) or gas drops below $12.21 per Mcf (now $17.62); past either point, gas becomes the cheaper fuel in Liberty Lake. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $311 a year saved, a difference under $2,177 pays back within 7 years here, and under $3,110 within 10.
The other scenario: no gas furnace to begin with
Not every home in Liberty Lake has gas service. Swap the comparison to resistance heat instead of gas, and Liberty Lake's answer improves. The saving here runs about $1,293 a year, which recovers the extra $10,000 spent going electric in roughly 7.7 years.
Where Liberty Lake ranks in this dataset
Ranked against the other 3206 cities covered, Liberty Lake comes in at 363 for heating severity, 1 would be the coldest place in the dataset, and 2605 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.
Next step if you live in Liberty Lake
About 13,353 people live in Liberty Lake, Washington, and every number on this page is what a contractor would actually work from when quoting a system here, the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Ask a local HVAC contractor for a quote before committing either way.
Where Liberty Lake's figure comes from
The methodology guide walks through exactly how Liberty Lake's 2.65 seasonal COP and the rest of this page's numbers get built. Liberty Lake's -2°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.