Monroe, LA: the heat pump payback math

In Monroe, 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 $3,500 more up front here (already netting out a $2,000 tax credit). Lower bills claw that back: about $292 saved annually, for a payback of roughly 12 years. Whether that's worth it in Monroe depends on how many years you expect to own the place.

The climate behind Monroe's payback figure

Monroe has a mild winter by US standards — 1662 heating degree days a year against a 65°F base — and summers are severe enough that cooling can dominate the annual bill, at 2858 cooling degree days. Sizing runs off the design temperature, not the average day: 19°F here (record low 12°F), which works out to a seasonal COP of 3.16 for the cold-climate class of unit this climate calls for. A cold-climate unit is the right call in Monroe — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. These numbers come from MONROE REGIONAL AIRPORT, the closest NOAA station, 2.1 miles out.

The month-to-month numbers for Monroe

Electricity use for heating alone comes out to about 1,332 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $510 a year. Monroe's gas rate of 17.38 per Mcf, applied to the 17 Mcf a year the furnace burns, puts its running cost near $802 a year, against 13.52¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is roughly 46.2 years, leaving the 15-year total $881 ahead.

The other scenario: no gas furnace to begin with

Gas isn't universal in Monroe — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Monroe's answer improves. Switching saves about $560 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $8,000 spent up front comes back in about 14.3 years.

How Monroe compares nationally

Among 3206 cities, Monroe's winter puts it at rank 2617 for severity, while its size puts it at rank 878 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 Monroe

About 46,622 people live in Monroe, Louisiana, 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.

Ask a local HVAC contractor for a quote before committing either way.

Reading further on this page's numbers

Every constant behind this page — the 3.16 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Monroe's 19°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.