Should Lexington switch to a heat pump?
This one's marginal in Lexington: it only clears if you stay long enough. 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). Lower bills claw that back: about $263 saved annually, for a payback of roughly 13.3 years. It's a genuine toss-up here — Lexington's numbers don't point clearly either way.
How cold Lexington actually gets
2070 heating degree days pile up here every year, so Lexington has a mild winter by US standards; the cooling side runs to 2301 cooling degree days, where summers are hot enough that cooling matters as much as heating. 19.9°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 17.1°F on file. Worked through the model, that's a seasonal COP of 3.18 on the cold-climate unit fit for this climate. Lexington 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 COLUMBIA METROPOLITAN AIRPORT, 6.9 miles from Lexington — the closest one on record.
The month-to-month numbers for Lexington
Electricity use for heating alone comes out to about 1,648 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $583 a year. The gas furnace it replaces burns roughly 22 Mcf a year at 16.91 per Mcf here, for a running cost near $846 a year (electricity here runs 16.16¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 51.3 years, leaving the 15-year total $446 ahead.
If your home heats with electric baseboard instead of gas
Plenty of homes in Lexington heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Lexington's answer improves. Switching saves about $746 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 10.7 years.
Where Lexington ranks in this dataset
Ranked against the other 3206 cities covered, Lexington comes in at 2398 for heating severity — 1 would be the coldest place in the dataset — and 1581 by population, where 1 is largest. That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
Deciding what's next in Lexington, SC
Lexington, South Carolina is home to about 25,354 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 Lexington, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Where Lexington's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Lexington's 3.18 seasonal COP and payback figure. Lexington's 19.9°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.