Heat Pump Payback in Lafayette, LA
Will a heat pump pay off in Lafayette, LA?
In Lafayette, the math is close enough that it comes down to how long you plan to stay. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,000. That premium is recovered through $276 of lower running costs every year, landing the payback clock at roughly 10.9 years. It's a genuine toss-up here, Lafayette's numbers don't point clearly either way.
Not the city you meant?
This runs the same numbers for 3206 US cities, not just Lafayette. Look one up here.
How cold Lafayette actually gets
Lafayette barely has a winter to speak of, 1014 heating degree days a year against a 65°F base, and summers are severe enough that cooling can dominate the annual bill, at 3442 cooling degree days. Sizing runs off the design temperature, not the average day: 28.9°F here (coldest 2024 reading 18°F), which works out to a seasonal COP of 3.06 for the standard class of unit this climate calls for. Lafayette's winters don't get cold enough to need the cold-climate premium, a standard unit holds up fine. Climate figures trace to the nearest NOAA station, Lafayette Regional Airport, 2.4 miles from Lafayette.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 839 kWh a year to keep it warm, plus cooling, for a combined electric bill near $510 a year. That compares with roughly 11 Mcf a year of gas at Lafayette's $17.38 per-Mcf rate, about $787 a year with the old AC included, against a local electricity rate of 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 $1,146 ahead.
The break-even point in Lafayette
In Lafayette 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 Lafayette: the heat pump is worth it within a decade if it costs less than $2,760 more than replacing the furnace and AC, and within 7 years if the gap is under $1,932.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Lafayette, many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The gap still doesn't close: the $7,500 incremental cost outlasts the 15-year equipment life here even against resistance heat.
How Lafayette compares nationally
Among 3206 cities, Lafayette's winter puts it at rank 2898 for severity, while its size puts it at rank 242 for population, 1 in both cases being the extreme. 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 Lafayette
Lafayette, Louisiana is home to about 122,280 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 Lafayette, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Where Lafayette's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Lafayette's 3.06 seasonal COP and payback figure. Homes in Lafayette without gas service should read the electric-resistance comparison instead, the numbers there differ from the gas case above.