Should Dallas switch to a heat pump?
In Dallas, 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. That premium is recovered through $243 of lower running costs every year, landing the payback clock at roughly 14.4 years. It's a genuine toss-up here — Dallas's numbers don't point clearly either way.
How cold Dallas actually gets
3970 heating degree days pile up here every year, so Dallas has a real but manageable winter; the cooling side runs to 686 cooling degree days, where summers add a moderate cooling load. Sizing runs off the design temperature, not the average day: 16°F here (record low 15.8°F), which works out to a seasonal COP of 3.08 for the cold-climate class of unit this climate calls for. Dallas 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. Climate figures trace to the nearest NOAA station, MCNARY FIELD AIRPORT, 15.3 miles from Dallas.
What it actually costs to run, year to year
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. Dallas's gas rate of 16.71 per Mcf, applied to the 41 Mcf a year the furnace burns, puts its running cost near $825 a year, against 15.14¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is roughly 55.6 years, leaving the 15-year total $142 ahead.
The other scenario: no gas furnace to begin with
Not every home in Dallas has gas service. Swap the comparison to resistance heat instead of gas, and Dallas's answer improves. The saving here runs about $1,074 a year, which recovers the extra $8,000 spent going electric in roughly 7.4 years.
How Dallas compares nationally
Ranked against the other 3206 cities covered, Dallas comes in at 1549 for heating severity — 1 would be the coldest place in the dataset — and 2106 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
What to do with this number in Dallas
Dallas, Oregon is home to about 17,911 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 Dallas, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Dallas's 3.08 seasonal COP and payback figure. Dallas's 16°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.