Heat pump vs. gas furnace in Bluffton, SC
In Bluffton, a heat pump pays for itself within a reasonable window. Against a like-for-like gas furnace and AC swap, going electric costs $1,000 more up front here (already netting out a $2,000 tax credit). Lower bills claw that back: about $256 saved annually, for a payback of roughly 3.9 years. The window here is reasonable, and it's specific to what Bluffton actually pays for power and gas.
How cold Bluffton actually gets
Degree days tell the story here: Bluffton racks up 1258 heating degree days each year (base 65°F), and summers are severe enough that cooling can dominate the annual bill, with 2658 cooling degree days on the cooling side. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 37.4°F, against a record low of 28°F. That puts the seasonal coefficient of performance at 3.31 for the recommended standard unit. Bluffton's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. Source: NOAA station FT PALASKI, 12.9 miles from Bluffton — the closest one on record.
Bluffton's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 962 heating kilowatt-hours annually on top of cooling, totalling about $522 a year on electricity. That compares with roughly 13 Mcf a year of gas at Bluffton's 16.91 per-Mcf rate — about $778 a year — against a local electricity rate of 16.16¢/kWh. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 42.9 years, for a 15-year net position $2,847 ahead.
If your home heats with electric baseboard instead of gas
Not every home in Bluffton has gas service. Swap the comparison to resistance heat instead of gas, and Bluffton's answer improves. Switching saves about $550 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $5,500 spent up front comes back in about 10 years.
Where Bluffton ranks in this dataset
Ranked against the other 3206 cities covered, Bluffton comes in at 2780 for heating severity — 1 would be the coldest place in the dataset — and 1139 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 Bluffton
Bluffton, South Carolina is home to about 36,146 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. Given the math above, Bluffton is a place worth lining up quotes ahead of a breakdown, not waiting for one.
Get quotes from local HVAC contractors before deciding.
More on how this number was built
Every constant behind this page — the 3.31 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. The $2,000 federal credit baked into Bluffton's number is explained, with the before-and-after math, in the tax credit guide.