Will a heat pump pay off in Kent, WA?

In Kent, 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. Kent's residents would see roughly $336 a year back in running costs, putting the payback around 10.4 years. It's a genuine toss-up here — Kent's numbers don't point clearly either way.

Kent's weather, in the numbers that matter

4626 heating degree days pile up here every year, so Kent has a real but manageable winter; the cooling side runs to 260 cooling degree days, where summers rarely ask much of an air conditioner. 19°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 15.1°F on file. Worked through the model, that's a seasonal COP of 3.16 on the cold-climate unit fit for this climate. Kent 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. Source: NOAA station SEATTLE-TACOMA INTERNATIONAL, 6 miles from Kent — the closest one on record.

Kent's running-cost comparison, in dollars

A 2000-square-foot house here would pull roughly 3,707 heating kilowatt-hours annually on top of cooling, totalling about $561 a year on electricity. That compares with roughly 48 Mcf a year of gas at Kent's 17.62 per-Mcf rate — about $897 a year — against a local electricity rate of 14.27¢/kWh. Buy it outright, not incrementally, and payback stretches to 40.1 years; over 15 years the net position sits $1,546 ahead.

If your home heats with electric baseboard instead of gas

Plenty of homes in Kent 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 $1,159 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $8,000 spent up front comes back in about 6.9 years.

Kent against the rest of the country

Ranked against the other 3206 cities covered, Kent comes in at 1061 for heating severity — 1 would be the coldest place in the dataset — and 213 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.

What to do with this number in Kent

Kent, Washington is home to about 136,588 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 Kent, 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

Nothing above is a black box: the methodology guide shows the full arithmetic behind Kent's 3.16 seasonal COP and payback figure. Kent's 19°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.