Heat Pump Payback in Lynnwood, WA
Heat pump vs. gas furnace in Lynnwood, WA
The payback math works in Lynnwood on paper, past the equipment's own working life. $5,500 is what Lynnwood would pay extra to go electric rather than replace the furnace and AC with the same again. Lynnwood's residents would see roughly $318 a year back in running costs, putting the payback around 17.3 years. That's a technicality, not a recommendation, for anyone actually living in Lynnwood.
Compare against another city
This runs the same numbers for 3206 US cities, not just Lynnwood. Look one up here.
Lynnwood's weather, in the numbers that matter
Degree days tell the story here: Lynnwood 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, Lynnwood sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, Snohomish Co (Paine Fd) AP, 5.5 miles from Lynnwood.
The yearly running costs in Lynnwood
Electricity use for heating alone comes out to about 3,632 kWh a year on the 2000-square-foot reference house; folding in cooling puts the 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.
What would change Lynnwood's answer
Gas would only overtake the heat pump in Lynnwood 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 Lynnwood: 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 Lynnwood, compared
Plenty of homes in Lynnwood heat with electricity alone, no gas line involved. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $1,116 a year, which recovers the extra $10,000 spent going electric in roughly 9 years.
Lynnwood against the rest of the country
Lynnwood lands at position 1204 out of 3206 cities on heating severity (coldest is 1), and 985 out of 3206 by population size (biggest is 1). That's the middle third for winter severity among the cities covered here.
What to do with this number in Lynnwood
Lynnwood, Washington is home to about 41,597 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 Lynnwood, 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. Lynnwood's 18°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.