Heat Pump Payback in Sulphur, LA
Sulphur, LA: the heat pump payback math
This one's marginal in Sulphur: it only clears if you stay long enough. $3,000 is what Sulphur would pay extra to go electric rather than replace the furnace and AC with the same again. Lower bills claw that back: about $259 saved annually, for a payback of roughly 11.6 years. It's a genuine toss-up here, Sulphur's numbers don't point clearly either way.
Compare against another city
Landed on Sulphur by mistake, or want to compare it against somewhere else? Search the other 3206 cities below.
How cold Sulphur actually gets
Degree days tell the story here: Sulphur racks up 941 heating degree days each year (base 65°F), and summers are severe enough that cooling can dominate the annual bill, with 3205 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 30.4°F, and the coldest daily reading in the 2024 station record was 19.4°F. That puts the seasonal coefficient of performance at 3.11 for the recommended standard unit. Sulphur's winters don't get cold enough to need the cold-climate premium, a standard unit holds up fine. These numbers come from Southland Field Airport, the closest NOAA station, 6.9 miles out.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 766 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $473 a year. The gas furnace it replaces burns roughly 10 Mcf a year at $17.38 per Mcf here, for a running cost near $732 a year including the old AC (electricity here runs 13.52¢/kWh). Priced as a standalone purchase, with a working furnace ripped out early, payback would take longer than the 15-year equipment life. Measured against the like-for-like replacement instead, a household here ends 15 years $883 ahead.
The break-even point in Sulphur
In Sulphur the cooling savings outweigh the extra electricity for heating, so no plausible change in the electricity rate would make the old furnace and AC cheaper to run. A useful quote test for Sulphur: the heat pump is worth it within a decade if it costs less than $2,590 more than replacing the furnace and AC, and within 7 years if the gap is under $1,813.
Electric resistance heat in Sulphur, compared
Not every home in Sulphur has gas service. Swap the comparison to resistance heat instead of gas, and Sulphur's answer improves. The gap still doesn't close: the $7,500 incremental cost outlasts the 15-year equipment life here even against resistance heat.
Where Sulphur ranks in this dataset
Sulphur lands at position 2932 out of 3206 cities on heating severity (coldest is 1), and 1880 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.
Deciding what's next in Sulphur, LA
Sulphur, Louisiana is home to about 20,572 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 Sulphur, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
More on how this number was built
Nothing above is a black box: the methodology guide shows the full arithmetic behind Sulphur's 3.11 seasonal COP and payback figure. Homes in Sulphur without gas service should read the electric-resistance comparison instead, the numbers there differ from the gas case above.