Is a heat pump worth it in Monmouth?
Monmouth sits right on the fence — how long you'll own the house decides this one. $3,500 is what Monmouth would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. Monmouth's residents would see roughly $243 a year back in running costs, putting the payback around 14.4 years. It's a genuine toss-up here — Monmouth's numbers don't point clearly either way.
Monmouth's weather, in the numbers that matter
Monmouth has a real but manageable winter — 3970 heating degree days a year against a 65°F base — and summers add a moderate cooling load, at 686 cooling degree days. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 16°F, against a record low of 15.8°F. That puts the seasonal coefficient of performance at 3.08 for the recommended cold-climate unit. A cold-climate unit is the right call in Monmouth — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Source: NOAA station MCNARY FIELD AIRPORT, 11.7 miles from Monmouth — the closest one on record.
The month-to-month numbers for Monmouth
A 2000-square-foot house here would pull roughly 3,264 heating kilowatt-hours annually on top of cooling, totalling about $583 a year on electricity. The gas furnace it replaces burns roughly 41 Mcf a year at 16.71 per Mcf here, for a running cost near $825 a year (electricity here runs 15.14¢/kWh). Buy it outright, not incrementally, and payback stretches to 55.6 years; over 15 years the net position sits $142 ahead.
If your home heats with electric baseboard instead of gas
Not every home in Monmouth has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $1,074 a year, which recovers the extra $8,000 spent going electric in roughly 7.4 years.
How Monmouth compares nationally
Monmouth lands at position 1550 out of 3206 cities on heating severity (coldest is 1), and 2870 out of 3206 by population size (biggest is 1). That's the middle third for winter severity among the cities covered here.
Next step for 11,651 people in Monmouth
Monmouth, Oregon is home to about 11,651 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 Monmouth, 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
The methodology guide walks through exactly how Monmouth's 3.08 seasonal COP and the rest of this page's numbers get built. Monmouth's 16°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.