Heat pump vs. gas furnace in St. Helens, OR
In St. Helens, the math is close enough that it comes down to how long you plan to stay. Against a like-for-like gas furnace and AC swap, going electric costs $3,500 more up front here (already netting out a $2,000 tax credit). St. Helens's residents would see roughly $244 a year back in running costs, putting the payback around 14.3 years. It's a genuine toss-up here — St. Helens's numbers don't point clearly either way.
How cold St. Helens actually gets
St. Helens has a real but manageable winter — 4131 heating degree days a year against a 65°F base — and summers add a moderate cooling load, at 514 cooling degree days. 17.1°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 16°F on file. Worked through the model, that's a seasonal COP of 3.11 on the cold-climate unit fit for this climate. A cold-climate unit is the right call in St. Helens — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Climate figures trace to the nearest NOAA station, PEARSON FIELD AIRPORT, 18 miles from St. Helens.
The month-to-month numbers for St. Helens
A 2000-square-foot house here would pull roughly 3,363 heating kilowatt-hours annually on top of cooling, totalling about $576 a year on electricity. That compares with roughly 43 Mcf a year of gas at St. Helens's 16.71 per-Mcf rate — about $820 a year — against a local electricity rate of 15.14¢/kWh. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 55.3 years, for a 15-year net position $163 ahead.
If your home heats with electric baseboard instead of gas
Gas isn't universal in St. Helens — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and St. Helens's answer improves. Switching saves about $1,109 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 7.2 years.
St. Helens against the rest of the country
Among 3206 cities, St. Helens's winter puts it at rank 1437 for severity, while its size puts it at rank 2450 for population — 1 in both cases being the extreme. That's the middle third for winter severity among the cities covered here.
Next step for 14,460 people in St. Helens
St. Helens, Oregon is home to about 14,460 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 St. Helens, 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
The methodology guide walks through exactly how St. Helens's 3.11 seasonal COP and the rest of this page's numbers get built. St. Helens's 17.1°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.