Natchez, MS: the heat pump payback math
This one's marginal in Natchez: it only clears if you stay long enough. 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). Natchez's residents would see roughly $253 a year back in running costs, putting the payback around 13.8 years. Whether that's worth it in Natchez depends on how many years you expect to own the place.
The climate behind Natchez's payback figure
Natchez has a mild winter by US standards — 1675 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 2449 cooling degree days. Sizing runs off the design temperature, not the average day: 21°F here (record low 8.1°F), which works out to a seasonal COP of 3.2 for the cold-climate class of unit this climate calls for. Below the 25°F line where a standard machine starts leaning on resistance backup, Natchez sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, HRDY-ANRES FD NTCHZ-ADAMS COU, 7.9 miles from Natchez.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 1,325 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $528 a year. Natchez's gas rate of 16.64 per Mcf, applied to the 17 Mcf a year the furnace burns, puts its running cost near $781 a year, against 15.47¢ per kWh for electricity. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 53.3 years, for a 15-year net position $298 ahead.
The other scenario: no gas furnace to begin with
Not every home in Natchez has gas service. Swap the comparison to resistance heat instead of gas, and Natchez's answer improves. The saving here runs about $619 a year, which recovers the extra $8,000 spent going electric in roughly 12.9 years.
Natchez against the rest of the country
Among 3206 cities, Natchez's winter puts it at rank 2599 for severity, while its size puts it at rank 2485 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.
Deciding what's next in Natchez, MS
About 14,233 people live in Natchez, Mississippi, and every number on this page is what a contractor would actually work from when quoting a system here — the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Get quotes from local HVAC contractors before deciding.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Natchez's 3.2 seasonal COP and payback figure. At a 21°F design temperature, Natchez sits in cold-climate territory; the guide to that class of unit explains why.