Is a heat pump worth it in Centralia?
In Centralia, the math is close enough that it comes down to how long you plan to stay. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. Centralia's residents would see roughly $354 a year back in running costs, putting the payback around 9.9 years. Whether that's worth it in Centralia depends on how many years you expect to own the place.
The climate behind Centralia's payback figure
4926 heating degree days pile up here every year, so Centralia has a real but manageable winter; the cooling side runs to 179 cooling degree days, where summers rarely ask much of an air conditioner. 19.4°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 15.8°F on file. Worked through the model, that's a seasonal COP of 3.17 on the cold-climate unit fit for this climate. Centralia needs the cold-climate class of unit: past a 25°F design temperature a standard heat pump falls back on resistance backup often enough to eat the savings. These numbers come from CHEHALIS CENTRALIA AIRPORT, the closest NOAA station, 2.8 miles out.
The month-to-month numbers for Centralia
A 2000-square-foot house here would pull roughly 3,935 heating kilowatt-hours annually on top of cooling, totalling about $583 a year on electricity. That compares with roughly 51 Mcf a year of gas at Centralia's 17.62 per-Mcf rate — about $937 a year — against a local electricity rate of 14.27¢/kWh. Looked at as a full purchase rather than an incremental one, payback here is roughly 38.2 years, leaving the 15-year total $1,807 ahead.
Electric resistance heat in Centralia, compared
Not every home in Centralia has gas service. Swap the comparison to resistance heat instead of gas, and Centralia's answer improves. The saving here runs about $1,230 a year, which recovers the extra $8,000 spent going electric in roughly 6.5 years.
Where Centralia ranks in this dataset
Ranked against the other 3206 cities covered, Centralia comes in at 833 for heating severity — 1 would be the coldest place in the dataset — and 2006 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.
Deciding what's next in Centralia, WA
About 19,061 people live in Centralia, 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.
Get quotes from local HVAC contractors before deciding.
More on how this number was built
Every constant behind this page — the 3.17 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Centralia's 19.4°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.