Heat Pump Payback in Tualatin, OR
Is a heat pump worth it in Tualatin?
Tualatin technically pencils out, but only past the point the equipment would need replacing anyway. $5,500 is what Tualatin would pay extra to go electric rather than replace the furnace and AC with the same again. Tualatin's residents would see roughly $256 a year back in running costs, putting the payback around 21.5 years. Tualatin'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 Tualatin. Look one up here.
Why Tualatin's climate drives this number
Degree days tell the story here: Tualatin racks up 4286 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 518 cooling degree days on the cooling side. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is 18°F, and the coldest daily reading in the 2024 station record was 16°F. That puts the seasonal coefficient of performance at 3.13 for the recommended cold-climate unit. A cold-climate unit is the right call in Tualatin, below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. These numbers come from Aurora State Airport, the closest NOAA station, 8.8 miles out.
Tualatin's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 3,467 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $592 a year. The gas furnace it replaces burns roughly 45 Mcf a year at $16.71 per Mcf here, for a running cost near $848 a year including the old AC (electricity here runs 15.14¢/kWh). If the current system still worked and you replaced it anyway, the full cost would take longer than the 15-year equipment life to earn back; against buying a new furnace and AC regardless, the 15-year total lands $1,664 behind.
The break-even point in Tualatin
This result holds unless electricity climbs above 23.0¢/kWh (it is 15.14¢ now) or gas drops below $10.98 per Mcf (now $16.71); past either point, gas becomes the cheaper fuel in Tualatin. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $256 a year saved, a difference under $1,792 pays back within 7 years here, and under $2,560 within 10.
The other scenario: no gas furnace to begin with
Not every home in Tualatin has gas service. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. About $1,153 a year comes back this way, enough that the 8.7-year payback clears the $10,000 premium comfortably within the equipment's life.
Tualatin against the rest of the country
Among 3206 cities, Tualatin's winter puts it at rank 1336 for severity, while its size puts it at rank 1426 for population, 1 in both cases being the extreme. That's the middle third for winter severity among the cities covered here.
Next step if you live in Tualatin
About 28,036 people live in Tualatin, Oregon, 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.
Reading further on this page's numbers
Every constant behind this page, the 3.13 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Tualatin's 18°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.