Will a heat pump pay off in Brentwood, TN?
The payback math works in Brentwood on paper, past the equipment's own working life. $3,500 is what Brentwood 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. Lower bills claw that back: about $134 saved annually, for a payback of roughly 26.2 years. That's a technicality, not a recommendation, for anyone actually living in Brentwood.
How cold Brentwood actually gets
2670 heating degree days pile up here every year, so Brentwood has a mild winter by US standards; the cooling side runs to 2133 cooling degree days, where summers are hot enough that cooling matters as much as heating. Sizing runs off the design temperature, not the average day: 7°F here (record low -0.9°F), which works out to a seasonal COP of 2.87 for the cold-climate class of unit this climate calls for. Brentwood 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 NASHVILLE INTERNATIONAL AIRPO, the closest NOAA station, 9.8 miles out.
The month-to-month numbers for Brentwood
A 2000-square-foot house here would pull roughly 2,356 heating kilowatt-hours annually on top of cooling, totalling about $579 a year on electricity. That compares with roughly 28 Mcf a year of gas at Brentwood's 11.84 per-Mcf rate — about $713 a year — against a local electricity rate of 13.87¢/kWh. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 101 years, for a 15-year net position $1,495 behind.
Electric resistance heat in Brentwood, compared
Plenty of homes in Brentwood 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 $742 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 10.8 years.
Brentwood against the rest of the country
Among 3206 cities, Brentwood's winter puts it at rank 2054 for severity, while its size puts it at rank 904 for population — 1 in both cases being the extreme. That's the middle third for winter severity among the cities covered here.
Deciding what's next in Brentwood, TN
Brentwood, Tennessee is home to about 45,525 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 Brentwood, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
Where Brentwood's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Brentwood's 2.87 seasonal COP and payback figure. Brentwood's 7°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.