Heat Pump vs. Gas Furnace in Memphis Winters

Milder than people expect, with sharp exceptions. NOAA's 1991–2020 normals for Memphis International Airport show a January average high near 51°F and an average low near 33°F, and the year totals about 2,965 heating degree days against 2,258 cooling degree days. In other words, the Mid-South is a cooling climate with a real but short heating season; December through February carry most of the heating load.

The exceptions are the cold snaps, when Arctic air drops overnight lows into the teens or lower for a few days, as it has several times in recent winters. Those stretches are when pipes freeze, heat strips run for hours, and no-heat calls stack up. Plan for the mild weeks that make up most of the season and for the few days that are not, at the same time.

Better than its reputation. A heat pump moves heat rather than making it, and ENERGY STAR notes a certified air-source heat pump can deliver up to three times more heat energy than the electricity it uses. Capacity and efficiency do fall as the outdoor air gets colder, because there is less heat to collect, and at some point, the balance point, the house loses heat faster than the heat pump alone can supply. In our experience that point often lands in the 30s on a standard unit.

Between 25 and 35°F a modern unit is still heating, with longer run times and occasional help from the backup. ENERGY STAR certification now requires third-party verified performance down to 5°F, and cold-climate models keep most of their capacity well below freezing. Older single-stage heat pumps from the 2000s are the ones that lean heavily on strips once it drops into the low 30s, and that is the bill shock people remember.

Two things you will notice in that range are normal. Defrost cycles: the outdoor coil frosts on damp cold mornings, the system briefly reverses to melt it, and steam rises off the unit for a few minutes. Backup strips: plain resistance heat, the least efficient heat in the house, meant for defrost support, cold snaps, and recovery after a big setback. If the auxiliary-heat light is on during a 45-degree afternoon, something is wrong.

Dual-fuel pairs a heat pump with a gas furnace in place of electric strips. Above a switchover temperature, often set in the 30s to around 40°F, the heat pump heats the house cheaply; below it, the furnace takes over with hot, fast supply air. ENERGY STAR describes the pairing as a modest extra cost over a straight AC system, and for a home that already has a gas line and furnace, the upgrade at replacement time is choosing a heat pump outdoor unit instead of a plain condenser.

It fits Memphis specifically because MLGW sells both gas and electricity inside Shelby County, so one bill shows what each fuel costs you, and because mild months dominate. In DeSoto County, electricity comes from Entergy Mississippi or Northcentral Electric depending on address, with Atmos Energy and the City of Olive Branch supplying gas. We install and service dual-fuel systems under both our mechanical and electrical licenses.

Our installed systems run $6,500–$18,000 whether that is a gas furnace with a matched AC, a heat pump with strips, or a dual-fuel pairing; where a specific house lands depends on size, efficiency tier, and ductwork. Ductless mini-split heat pumps for an addition, sunroom, or a house without ducts run $3,800–$12,000 from single to multi-zone. Heating repairs on either type mostly fall in our $150–$650 common-repair range.

The estimate is free and in-home, and we price good, better, and best with the operating-cost difference spelled out. A 10-minute live video walkthrough of your furnace, outdoor unit, and thermostat lets us arrive with the right options, and the data plate photos from our guide tell us the age, refrigerant type, and capacity before we ever knock on the door.

TVA EnergyRight, delivered through local power companies including MLGW, currently lists $800 for an air-source or dual-fuel heat pump at 17 SEER2 or higher and $500 at 15 to 16.99 SEER2, installed by a Quality Contractor Network member. Entergy Mississippi's residential heating and cooling program lists incentives up to $1,100 on qualifying heat pumps, $300–$850 on central AC tiers, and per-ton incentives on ductless mini-splits through a participating trade ally, while funds last.

Program amounts change by year and by utility, so treat these as pointers, not promises, and check the program pages before you sign. The federal 25C tax credit covered qualifying equipment placed in service through 2025 and does not apply to 2026 installations as of this writing. Our rebates guide tracks what is live for MLGW, TVA, and Entergy customers, and MLGW's energy-saving tools page lists what it offers its own customers.

Keep or choose straight gas when the furnace is young and sound and only the AC has failed; a matched condenser and coil is the cheaper, sensible repair. Gas also wins for homes that are poorly insulated or have leaky ducts, where a heat pump would spend too many hours near its balance point, and for households that dislike the cooler supply air a heat pump delivers on cold mornings. If your electrical panel is full and an upgrade would be costly, gas avoids that work.

Go heat pump or dual-fuel when the whole system is due, when there is no gas line, when rebates close the price gap, or when summer cooling is the bigger bill anyway, which in Memphis it almost always is. The honest answer for most of our customers at replacement time is dual-fuel. We show you all three columns, and the numbers from your own house decide.