Heat Pump Payback in Slidell, LA
Should Slidell switch to a heat pump?
In Slidell, the math is close enough that it comes down to how long you plan to stay. Against a like-for-like gas furnace and AC swap, going electric costs $3,000 more up front here. Lower bills claw that back: about $272 saved annually, for a payback of roughly 11 years. It's a genuine toss-up here, Slidell's numbers don't point clearly either way.
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Slidell's weather, in the numbers that matter
Degree days tell the story here: Slidell racks up 1172 heating degree days each year (base 65°F), and summers are severe enough that cooling can dominate the annual bill, with 3201 cooling degree days on the cooling side. 28°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of 18°F in the 2024 station record. Worked through the model, that's a seasonal COP of 3.03 on the standard unit fit for this climate. Slidell's winters don't get cold enough to need the cold-climate premium, a standard unit holds up fine. Source: NOAA station Slidell Airport, 4.4 miles from Slidell, the closest one on record.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 979 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $501 a year. That compares with roughly 12 Mcf a year of gas at Slidell's $17.38 per-Mcf rate, about $773 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 $1,074 ahead.
The break-even point in Slidell
In Slidell 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 Slidell: the heat pump is worth it within a decade if it costs less than $2,720 more than replacing the furnace and AC, and within 7 years if the gap is under $1,904.
Electric resistance heat in Slidell, compared
Not every home in Slidell has gas service. Swap the comparison to resistance heat instead of gas, and Slidell'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.
How Slidell compares nationally
Slidell lands at position 2804 out of 3206 cities on heating severity (coldest is 1), and 1409 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 Slidell, LA
Slidell, Louisiana is home to about 28,440 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 Slidell, 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
Nothing above is a black box: the methodology guide shows the full arithmetic behind Slidell's 3.03 seasonal COP and payback figure. Homes in Slidell without gas service should read the electric-resistance comparison instead, the numbers there differ from the gas case above.