Heat Pump Payback in Bothell, WA
Will a heat pump pay off in Bothell, WA?
In Bothell, 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 $318 of lower running costs every year, landing the payback clock at roughly 17.3 years. That's a technicality, not a recommendation, for anyone actually living in Bothell.
Compare against another city
Landed on Bothell by mistake, or want to compare it against somewhere else? Search the other 3206 cities below.
How cold Bothell actually gets
Degree days tell the story here: Bothell racks up 4489 heating degree days each year (base 65°F), and summers rarely ask much of an air conditioner, with 200 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 18°F here (coldest 2024 reading 12.9°F), which works out to a seasonal COP of 3.13 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, Bothell sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station Snohomish Co (Paine Fd) AP, 9.9 miles from Bothell, the closest one on record.
The yearly running costs in Bothell
Modelled on a typical 2000-square-foot house, the heat pump draws about 3,632 kWh a year to keep it warm, plus cooling, for a combined electric bill near $543 a year. The gas furnace it replaces burns roughly 47 Mcf a year at $17.62 per Mcf here, for a running cost near $861 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 $727 behind.
How sensitive Bothell's result is to prices
Gas would only overtake the heat pump in Bothell if electricity rose past 23.3¢/kWh from 14.27¢, or gas fell under $10.81 per Mcf from $17.62. A useful quote test for Bothell: the heat pump is worth it within a decade if it costs less than $3,180 more than replacing the furnace and AC, and within 7 years if the gap is under $2,226.
Electric resistance heat in Bothell, compared
Not every home in Bothell 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 $1,116 a year comes back this way, enough that the 9-year payback clears the $10,000 premium comfortably within the equipment's life.
Bothell against the rest of the country
Among 3206 cities, Bothell's winter puts it at rank 1202 for severity, while its size puts it at rank 787 for population, 1 in both cases being the extreme. That's the middle third for winter severity among the cities covered here.
What to do with this number in Bothell
Bothell, Washington is home to about 51,770 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 Bothell, nothing is lost by holding off until the current equipment genuinely fails.
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. Bothell's 18°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here, see what that changes in the cold-climate unit guide.