Heat pump vs. gas furnace in Millington, TN
The payback math works in Millington 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). Millington's residents would see roughly $140 a year back in running costs, putting the payback around 25 years. Millington's own numbers say this pencils out only in theory, not in practice.
The climate behind Millington's payback figure
Degree days tell the story here: Millington racks up 2515 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 2105 cooling degree days on the cooling side. 10.4°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -0.4°F on file. Worked through the model, that's a seasonal COP of 2.95 on the cold-climate unit fit for this climate. Millington 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. Source: NOAA station MILLINGTON MUNICIPAL AIRPORT, 2.2 miles from Millington — the closest one on record.
Millington's running-cost comparison, in dollars
Modelled on a typical 2000-square-foot house, the heat pump draws about 2,159 kWh a year to keep it warm, plus cooling, for a combined electric bill near $548 a year. Millington's gas rate of 11.84 per Mcf, applied to the 26 Mcf a year the furnace burns, puts its running cost near $689 a year, against 13.87¢ per kWh for electricity. Buy it outright, not incrementally, and payback stretches to 96.3 years; over 15 years the net position sits $1,398 behind.
Electric resistance heat in Millington, compared
Plenty of homes in Millington heat with electricity alone, no gas line involved. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. Switching saves about $713 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 11.2 years.
Millington against the rest of the country
Millington lands at position 2169 out of 3206 cities on heating severity (coldest is 1), and 2901 out of 3206 by population size (biggest is 1). That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
What to do with this number in Millington
About 11,486 people live in Millington, 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 2.95 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Millington's 10.4°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.