Heat Pump Payback in Gresham, OR
Is a heat pump worth it in Gresham?
Gresham technically pencils out, but only past the point the equipment would need replacing anyway. Against a like-for-like gas furnace and AC swap, going electric costs $5,500 more up front here. That premium is recovered through $244 of lower running costs every year, landing the payback clock at roughly 22.5 years. That's a technicality, not a recommendation, for anyone actually living in Gresham.
Checking a different city
This runs the same numbers for 3206 US cities, not just Gresham. Look one up here.
How cold Gresham actually gets
Gresham has a real but manageable winter, 3827 heating degree days a year against a 65°F base, and summers add a moderate cooling load, at 635 cooling degree days. Sizing runs off the design temperature, not the average day: 19°F here (coldest 2024 reading 14°F), which works out to a seasonal COP of 3.16 for the cold-climate class of unit this climate calls for. Below the 25°F line where a standard machine starts leaning on resistance backup, Gresham sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, Portland-Troutdale Airport, 3.7 miles from Gresham.
Gresham's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 3,067 heating kilowatt-hours annually on top of cooling, totalling about $546 a year on electricity. The gas furnace it replaces burns roughly 40 Mcf a year at $16.71 per Mcf here, for a running cost near $791 a year including the old AC (electricity here runs 15.14¢/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 $1,835 behind.
What would change Gresham's answer
Gas would only overtake the heat pump in Gresham if electricity rose past 23.9¢/kWh from 15.14¢, or gas fell under $10.58 per Mcf from $16.71. A useful quote test for Gresham: the heat pump is worth it within a decade if it costs less than $2,440 more than replacing the furnace and AC, and within 7 years if the gap is under $1,708.
If your home heats with electric baseboard instead of gas
Plenty of homes in Gresham heat with electricity alone, no gas line involved. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. Switching saves about $1,045 a year here, a heat pump moving heat rather than generating it needs far less electricity than resistance coils, so the extra $10,000 spent up front comes back in about 9.6 years.
Where Gresham ranks in this dataset
Ranked against the other 3206 cities covered, Gresham comes in at 1630 for heating severity, 1 would be the coldest place in the dataset, and 290 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
Next step if you live in Gresham
Gresham, Oregon is home to about 111,507 people, and the figures above are the same ones a local HVAC contractor uses to size and quote a system, this site doesn't guess where a real quote would land, it just tells you whether it's worth asking for one. In Gresham, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
More on how this number was built
Every constant behind this page, the 3.16 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Gresham's 19°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.