Heat pump versus gas furnace for a New Orleans home

By Gail Barlow, HVAC Guides Editor · Updated September 2026

How a heat pump heats

A heat pump is an air conditioner that can run in reverse. In winter it pulls heat from the outdoor air and moves it inside. Modern heat pumps do that efficiently down to temperatures well below what New Orleans usually sees, and electric heat strips in the air handler cover the rare hard freeze.

All of Louisiana sits in the hot-humid climate zone, where cooling is the primary energy load. In southern Louisiana, winters are mild enough that a heat pump rarely needs its backup heat at all.

What a gas furnace does better

A gas furnace produces hotter air at the vents, which some people simply prefer. It keeps working in a power outage if paired with a generator large enough for the blower, and it can be cheaper to run in a house that uses a lot of heat. If the furnace is less than ten years old and working well, keeping it and replacing only the AC is often the most sensible move.

The real comparison: replacing both

When both the AC and furnace are due, a heat pump replaces two pieces of equipment with one outdoor unit and an air handler. There is no gas combustion in the attic, no flue, and no annual carbon monoxide concern. The cooling is identical to a standard AC of the same size and efficiency.

• Heat pump: one system, cools and heats, backup heat strips for freezes.
• AC plus gas furnace: two systems, hotter heat, gas line and flue required.
• Dual fuel: heat pump plus gas furnace, the furnace takes over in a hard freeze.

Running costs

Heating costs here are small compared with cooling costs, simply because the heating season is short. That shrinks the difference between the options: a gas furnace may heat more cheaply per hour in some homes, but it runs so few hours that the saving is modest. The cooling efficiency of the system you choose matters far more to your yearly bill.

Rebates and credits in 2026

It is worth being clear about what is not available. Published sources report that Entergy Louisiana's rebate programs are paused in 2026 and that the federal 25C tax credit expired at the end of 2025. Any quote that leans heavily on those incentives should be questioned.

Humidity and the choice of equipment

In this climate, how well a system removes moisture matters as much as how it heats. Here the heat pump and the AC-plus-furnace setup are identical, because the cooling side is the same equipment. What changes humidity control is how the system runs: single-stage units cycle on and off, while two-stage and variable-speed units run longer at lower output and pull more water from the air.

That means the more useful upgrade, for many homes, is not heat pump versus furnace at all but single-stage versus variable-speed. A variable-speed heat pump costs more up front and handles both humidity and the short heating season well. If budget is tight, a correctly sized single-stage heat pump with the thermostat fan set to auto still does a good job.

Whichever you choose, pair it with a load calculation and a duct inspection. Those two steps affect comfort and humidity more than the brand on the box.

When we recommend each

We recommend a heat pump when the AC and furnace are both near the end of their lives, when the house has no gas service or the gas is used only for heating, and when the electrical panel has capacity for backup heat strips. We recommend keeping or replacing a gas furnace when it is fairly new, when the household strongly prefers furnace heat, or when a dual-fuel setup makes sense because gas service is already in place.

Either way, the system should be sized from a load calculation, and the ductwork checked, because a new system connected to leaky attic ducts loses part of what you paid for.