Heat pump vs. gas furnace in Cookeville, TN
In Cookeville, 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 $3,500 after a $2,000 federal tax credit. Cookeville's residents would see roughly $57 a year back in running costs, putting the payback around 61.2 years. Cookeville's own numbers say this pencils out only in theory, not in practice.
Why Cookeville's climate drives this number
Degree days tell the story here: Cookeville racks up 3395 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 998 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 5°F here (record low -13°F), which works out to a seasonal COP of 2.82 for the cold-climate class of unit this climate calls for. Cookeville 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, UPPER CUMBERLAND REGIONAL AIR, 6.4 miles from Cookeville.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 3,048 heating kilowatt-hours annually on top of cooling, totalling about $541 a year on electricity. Cookeville's gas rate of 11.84 per Mcf, applied to the 35 Mcf a year the furnace burns, puts its running cost near $598 a year, against 13.87¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is roughly 236.1 years, leaving the 15-year total $2,642 behind.
The other scenario: no gas furnace to begin with
Gas isn't universal in Cookeville — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Cookeville's answer improves. About $831 a year comes back this way, enough that the 9.6-year payback clears the $8,000 premium comfortably within the equipment's life.
Cookeville against the rest of the country
Cookeville lands at position 1807 out of 3206 cities on heating severity (coldest is 1), and 1119 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 37,102 people in Cookeville
About 37,102 people live in Cookeville, Tennessee, and every number on this page is what a contractor would actually work from when quoting a system here — the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
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 2.82 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Cookeville's 5°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.