Stallings, NC: the heat pump payback math
Stallings sits right on the fence — how long you'll own the house decides this one. 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 $240 saved annually, for a payback of roughly 14.6 years. It's a genuine toss-up here — Stallings's numbers don't point clearly either way.
How cold Stallings actually gets
Degree days tell the story here: Stallings racks up 2531 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1731 cooling degree days on the cooling side. 17.1°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 15.1°F on file. Worked through the model, that's a seasonal COP of 3.11 on the cold-climate unit fit for this climate. Stallings 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, MONROE AIRPORT, 6.8 miles from Stallings.
The month-to-month numbers for Stallings
Modelled on a typical 2000-square-foot house, the heat pump draws about 2,061 kWh a year to keep it warm, plus cooling, for a combined electric bill near $528 a year. The gas furnace it replaces burns roughly 26 Mcf a year at 16.42 per Mcf here, for a running cost near $768 a year (electricity here runs 14.93¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 56.3 years, leaving the 15-year total $96 ahead.
The other scenario: no gas furnace to begin with
Gas isn't universal in Stallings — many houses run on electric heat already. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $764 a year, which recovers the extra $8,000 spent going electric in roughly 10.5 years.
How Stallings compares nationally
Ranked against the other 3206 cities covered, Stallings comes in at 2151 for heating severity — 1 would be the coldest place in the dataset — and 2127 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.
What to do with this number in Stallings
Stallings, North Carolina is home to about 17,617 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 Stallings, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
More on how this number was built
The methodology guide walks through exactly how Stallings's 3.11 seasonal COP and the rest of this page's numbers get built. Stallings's 17.1°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.