Heat pump vs. gas furnace in Murfreesboro, TN
The payback math works in Murfreesboro on paper, past the equipment's own working life. 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). That premium is recovered through $108 of lower running costs every year, landing the payback clock at roughly 32.5 years. Murfreesboro's own numbers say this pencils out only in theory, not in practice.
The climate behind Murfreesboro's payback figure
3001 heating degree days pile up here every year, so Murfreesboro has a real but manageable winter; the cooling side runs to 1705 cooling degree days, where summers are hot enough that cooling matters as much as heating. 7°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -7.6°F on file. Worked through the model, that's a seasonal COP of 2.87 on the cold-climate unit fit for this climate. Murfreesboro 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. These numbers come from SMYRNA AIRPORT, the closest NOAA station, 12.1 miles out.
The month-to-month numbers for Murfreesboro
Modelled on a typical 2000-square-foot house, the heat pump draws about 2,648 kWh a year to keep it warm, plus cooling, for a combined electric bill near $569 a year. The gas furnace it replaces burns roughly 31 Mcf a year at 11.84 per Mcf here, for a running cost near $677 a year (electricity here runs 13.87¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 125.4 years, leaving the 15-year total $1,885 behind.
The other scenario: no gas furnace to begin with
Gas isn't universal in Murfreesboro — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Murfreesboro's answer improves. About $792 a year comes back this way, enough that the 10.1-year payback clears the $8,000 premium comfortably within the equipment's life.
Where Murfreesboro ranks in this dataset
Ranked against the other 3206 cities covered, Murfreesboro comes in at 1929 for heating severity — 1 would be the coldest place in the dataset — and 158 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 Murfreesboro
About 168,387 people live in Murfreesboro, 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.
Get quotes from local HVAC contractors before deciding.
Where Murfreesboro's figure comes from
The methodology guide walks through exactly how Murfreesboro's 2.87 seasonal COP and the rest of this page's numbers get built. At a 7°F design temperature, Murfreesboro sits in cold-climate territory; the guide to that class of unit explains why.