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There is no universal winner between an electric resistance furnace and a natural-gas furnace. The better choice depends on your local electricity and gas rates, climate, heating demand, existing ducts and utility connections, installation work, and your tolerance for combustion-related maintenance. Compare those facts for your house rather than relying on a national cost claim.
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A heat pump deserves a separate evaluation if you are considering electric heat: it is not an electric furnace, and the U.S. Department of Energy says today’s heat pumps can reduce heating electricity use by up to 75% compared with electric resistance heating.
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Electric resistance furnace
An electric furnace sends indoor air across electric resistance elements. The elements heat up when energized, and a blower distributes that warmed air through the home’s ductwork. The furnace itself has no flame, fuel-burning heat exchanger, flue, or combustion exhaust. It still needs adequate electrical capacity, a correctly sized circuit, and a compatible thermostat and air-distribution system.
#1 Best Overall
- HEATING CAPACITY: Delivers 51,000 BTU heating output with 17KW electric power, providing efficient warmth for mobile home applications.
- MOBILE HOME DESIGN: Specifically engineered as a downflow electric furnace for mobile home installations with optimized airflow distribution.
- DOWNFLOW CONFIGURATION: Features downflow air delivery system that directs heated air downward for effective floor-level heat distribution.
- ELECTRIC OPERATION: Runs on electric power for clean, reliable heating without the need for gas lines or fuel storage.
The U.S. Department of Energy lists electricity and natural gas among common furnace energy sources and distinguishes furnaces from heat pumps in its consumer guidance: Consumer Furnaces.
Natural-gas forced-air furnace
A gas furnace burns natural gas in a burner assembly. A heat exchanger transfers combustion heat to the air stream without mixing the combustion gases into the indoor air, and a blower moves the heated air through the ducts. Combustion gases leave through a venting system designed for that furnace and installation.
Because a gas furnace burns fuel, installation and upkeep include the gas piping, burners, heat exchanger, vent, flue, condensate handling on high-efficiency models, and combustion-air requirements. A failure in installation, maintenance, or venting can create carbon-monoxide hazards, which is why safety is part of the comparison rather than an afterthought.
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Which costs less to run?
No current nationwide comparison proves that one system always produces a lower household bill. Your result is driven by the price you pay per unit of energy, how much heat your home needs, the furnace’s efficiency, and weather. A lightly heated, well-insulated home in one utility territory can produce the opposite result from a drafty home in another territory.
Rank #2
- GR9S800803BN Replaces the following older furnace model numbers: GMES800803BN,GM9S800803BN
- Upflow/Horizontal installation-CANNOT be installed as a downflow. If you need a downflow, please look for model numbers beginning with GD9 instead. Please contact us with any questions.
- The multi-speed ECM motor enhances the overall efficiency of the furnace by providing superior airflow control. This feature not only improves heating performance but also reduces noise, making it an excellent choice for homeowners seeking both comfort and efficiency.
- Aluminized Steel Primary Heat Exchanger
- Accessories such as linesets, thermostats, LP (Liquid Propane) conversion kits, sold separately
Gather the local inputs before choosing
Ask an installer or utility for these inputs and use the same heating-load assumption for each option:
- Your delivered electricity price in dollars per kilowatt-hour, including applicable supply and delivery charges.
- Your delivered natural-gas price in dollars per therm, plus recurring customer or distribution charges that would remain on the bill.
- Recent winter heating use, or a documented heat-load estimate if the home or system is new.
- The proposed electric furnace’s input capacity and the proposed gas furnace’s AFUE rating.
- The full installation quote, including electrical-panel or feeder work, gas-line work, venting, condensate drainage, permits, duct modifications, thermostat, and removal of the old system.
- Any rate rules, minimum charges, or seasonal pricing that change the comparison.
Estimate annual energy cost separately for each design. For an electric furnace, multiply the estimated kilowatt-hours used for space heating by your delivered electricity rate. For a gas furnace, estimate the therms required from the building’s heat demand and the furnace’s seasonal efficiency, then multiply by the delivered gas rate and add applicable fixed charges. Have the contractor show the assumptions and units so you can change them when rates or equipment change.
Why a published gas price is not your bill
The Department of Energy’s Federal Energy Management Program uses $0.961 per therm as an average natural-gas price at federal facilities in July 2024 in an illustrative purchasing calculation: Purchasing Energy-Efficient Residential Furnaces. That figure is a model assumption for federal facilities, not a current national household rate and not an electric-versus-gas verdict. Use your own utility statement for a household estimate.
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What AFUE tells you—and what it does not
Annual Fuel Utilization Efficiency (AFUE) is the percentage of a fuel-burning furnace’s incoming fuel energy converted to useful space heat over an entire heating season. A 95% AFUE gas furnace, for example, converts about 95% of its measured fuel input into seasonal space heat under the rating procedure; the remainder is lost, largely through exhaust and operating losses. DOE explains the definition and purchasing context in its furnace guidance.
Rank #3
- HEATING CAPACITY: 15 kW all-electric furnace delivers 47,000 BTU heating output, suitable for medium-sized mobile homes in ideal applications.
- EFFICIENT BLOWER MOTOR: Features ECM multi-speed blower motor with maximum 1600 CFM airflow for optimal heat distribution and low maintenance requirements.
- DOWNFLOW CONFIGURATION: Designed specifically for mobile home installations with compact dimensions of 60.63 inches height, 20 inches width, and 24.6 inches depth.
- ELECTRICAL SPECIFICATIONS: Operates on 208/230V single phase power, requires dual breakers with minimum (2) 82 amps and maximum (2) 90 amps capacity.
AFUE is useful for comparing gas-furnace models with one another. It is not a direct utility-bill comparison with an electric resistance furnace, because the two systems buy different forms of energy at different prices. A resistance furnace does not receive an AFUE label that can be placed on the same scale as a gas furnace’s seasonal fuel rating. Compare delivered energy cost and the home’s required heat, then include installation and maintenance.
Purchase and installation factors that change the decision
When an electric furnace is easier to install
- The home already has ducts, but no gas service or usable gas branch line.
- The electrical service and panel have enough capacity for the furnace and the home’s other loads.
- There is no practical route for a gas vent or combustion-air system.
- You want to avoid combustion equipment inside the home and the inspections associated with it.
An electric replacement can still require a new high-amperage circuit, feeder, disconnect, panel upgrade, transformer or control work, and duct changes. A written quote should identify each item rather than treating the furnace price as the installed price.
When a gas furnace may fit the existing house better
- A gas meter, correctly sized line, and compliant venting are already present.
- The replacement can use existing ducts and compatible controls with limited modification.
- Your local gas rate and heating demand make the modeled annual cost attractive.
- You accept the ongoing inspection, venting, and carbon-monoxide precautions that fuel burning requires.
A gas replacement may involve a new vent material or route, combustion-air provisions, condensate drainage for a condensing furnace, gas-line resizing, chimney changes, and code-required clearances. Those scope items can erase an apparent equipment-price advantage.
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Climate affects both annual run time and peak capacity. A cold climate with long heating seasons magnifies differences in delivered energy prices and equipment efficiency. A milder climate may make installation scope and summer air-conditioning compatibility more important than small seasonal efficiency differences. The only defensible way to size either furnace is a room-by-room heat-load calculation or an equivalent documented load analysis; replacing a furnace solely by matching the old nameplate can produce oversizing, short cycling, noise, and uneven temperatures.
Rank #4
- POWERFUL HEATING CAPACITY: 68,000 BTU output with 23kW electric heating element provides efficient warmth for mobile home applications.
- DOWNFLOW CONFIGURATION: Specifically designed for mobile home downflow installations, ensuring optimal heat distribution from ceiling to floor.
- MOBILE HOME CERTIFIED: Purpose-built electric furnace designed to meet the specific heating requirements and installation standards for mobile homes.
- DURABLE CONSTRUCTION: Built with quality components engineered for reliable performance and long-lasting operation in residential mobile home environments.
Both systems can use the same forced-air ducts and can be paired with central air conditioning. Comfort depends on blower control, duct design, return-air capacity, thermostat settings, filtration, and envelope conditions as much as on the energy source. ENERGY STAR recommends sealing the home and ducts, regular maintenance, and using furnace-hiring guidance; its consumer information is at Furnaces. These measures can improve comfort and performance, but no universal savings percentage applies to every house.
The heat-pump option for homes considering electric heat
A heat pump moves heat from outdoors to indoors instead of making all heat with electric resistance elements. In cooling mode it reverses the process. That makes it a distinct electric heating technology, not another name for an electric furnace.
DOE states: “Today’s heat pump can reduce your electricity use for heating by up to 75% compared to electric resistance heating such as furnaces and baseboard heaters.” Read “up to” as a general DOE comparison, not a guaranteed result for every climate, house, tariff, or installation. Actual performance depends on outdoor temperatures, equipment selection, defrost operation, duct condition, thermostat strategy, building envelope, and installation quality. See Heat Pump Systems and DOE’s Consumer Guide to Home Heating and Cooling.
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A dual-fuel (hybrid) system combines a heat pump with a gas furnace. Controls select the heat pump or furnace according to outdoor temperature, operating cost, capacity, or a homeowner’s settings. It can be useful where a heat pump handles much of the season but gas backup is desirable during colder weather. The equipment, controls, fuel rates, weather, and installation determine whether it beats either single-fuel design; obtain a house-specific calculation.
Best Value
- HEATING CAPACITY: Powerful 68,000 BTU output and 23kW electric furnace designed specifically for mobile home heating applications.
- UPFLOW CONFIGURATION: Upflow design efficiently distributes warm air upward through ductwork, ensuring consistent heat throughout your mobile home.
- MOBILE HOME CERTIFIED: Specifically engineered and rated for mobile home installations, meeting required safety and performance standards.
- ELECTRIC OPERATION: Clean, efficient electric heating system with 23kW power rating eliminates the need for gas lines or fuel storage.
Efficiency labels and rules to check by region
ENERGY STAR regional furnace criteria
ENERGY STAR’s current key product criteria list these minimum gas-furnace AFUE thresholds:
| Region | ENERGY STAR gas-furnace criterion |
|---|---|
| South | At least 95% AFUE |
| North | At least 97% AFUE |
These are regional certification criteria on ENERGY STAR’s Furnaces Key Product Criteria page, reviewed October 13, 2026. They do not mean every furnace sold in a region has that rating, nor do they predict your annual bill. Check the model’s certification listing and compare its installed cost and expected use.
Federal gas-furnace standard scheduled for late 2028
DOE announced a 95% AFUE energy-conservation standard for covered non-weatherized gas furnaces and mobile-home gas furnaces, with compliance beginning in late 2028. The announcement is dated September 29, 2023: Finalized Energy Efficiency Standards for Residential Furnaces. The rule covers the furnace categories described in that announcement and is not a blanket statement that every gas furnace, in every application, already has a 95% requirement. Late 2028 is a future compliance date, not a standard already in force.
Safety and maintenance responsibilities
Gas-furnace safety
Fuel-burning equipment can produce carbon monoxide when installation, maintenance, or venting is deficient. The U.S. Consumer Product Safety Commission recommends yearly professional inspection of fuel-burning home heating equipment. Its exact guidance says: “To prevent CO poisoning tragedies from occurring with your heating equipment, CPSC urges consumers to schedule a yearly professional inspection of all fuel-burning home heating systems, including furnaces, boilers, fireplaces, wood stoves, water heaters, chimneys, flues and vents.” Read the agency’s Home Heating Equipment guidance and its January 23, 2026 safety release, Keep Warm and Safe This Winter.
Install carbon-monoxide alarms on every level and outside sleeping areas, test them according to the manufacturer’s directions, and replace batteries or the alarm as specified. A battery-backup CO alarm is a sensible accessory for a home with fuel-burning equipment, but an alarm does not replace inspection, vent repairs, or immediate action when it sounds. CPSC reports more than 200 annual deaths from unintentional, non-fire-related carbon-monoxide poisoning associated with consumer products; that figure is not furnace-only, because heating equipment and portable generators are among the top contributors.
Electric-furnace upkeep
An electric furnace avoids combustion and flue-gas hazards, but it still needs filter replacement, blower and electrical inspection, clean coils where applicable, correct airflow, and thermostat checks. Loose electrical connections, failed sequencers, damaged elements, and restricted airflow can cause overheating, nuisance shutdowns, or high consumption. Have electrical work performed by a qualified professional, especially when a replacement changes circuit size or panel capacity.
A practical comparison checklist
- Document the existing system. Record the furnace model, fuel type, capacity, age, duct layout, thermostat, service history, and any comfort or safety problems.
- Get a heating-load calculation. Ask each bidder to state the design assumptions and recommended capacity rather than simply matching the old furnace.
- Collect utility data. Use recent electricity and gas bills, current delivered rates, fixed charges, and any time-of-use or seasonal rules.
- Request equivalent proposals. Require equipment efficiency, controls, warranty terms, permits, removal, startup, duct work, electrical work, gas-line work, venting, condensate drainage, and commissioning to be itemized.
- Check infrastructure. Confirm electrical-service capacity for an electric furnace or heat pump, and confirm gas pressure, line sizing, venting, combustion air, and CO-protection requirements for a gas furnace.
- Model annual cost. Use the same estimated heat demand and local rates for each option; show both energy use and fixed charges.
- Price the third option. If electric resistance is under consideration, obtain a heat-pump or dual-fuel quote with capacity, low-temperature performance, controls, and backup strategy stated.
- Verify contractor qualifications. Choose a contractor who provides a written load assessment, equipment submittals, permits, startup measurements, and clear maintenance instructions.
Decision guide: which system fits which situation?
| Priority or condition | Option that may fit | What to verify |
|---|---|---|
| No gas service and adequate electrical capacity | Electric furnace or heat pump | Panel capacity, circuit cost, heat-load sizing, and local electricity rate |
| Existing compliant gas connection and venting | Gas furnace | AFUE, vent condition, gas-line sizing, annual inspection, and CO alarms |
| Desire to cut resistance-heating electricity use | Heat pump | Cold-weather capacity, duct performance, controls, backup heat, and installer commissioning |
| Interest in switching between electric and gas by conditions | Dual-fuel system | Changeover temperature or control logic, both fuel rates, and added equipment cost |
| Combustion safety is a major concern | Electric furnace or heat pump | Electrical-service upgrades, emergency heat operation, and non-combustion maintenance |
Questions to put in every replacement quote
- What is the calculated design heating load, and what capacity are you proposing?
- What are the model numbers, rated efficiency, blower controls, and compatible thermostats?
- Which existing ducts will be reused, sealed, resized, or replaced?
- For electric equipment, what breaker, wire, disconnect, feeder, or panel changes are required?
- For gas equipment, what gas-line, vent, flue, combustion-air, condensate, and chimney work is required?
- What permits and inspections are included, and who completes them?
- What measurements will be taken at startup, such as airflow, temperature rise, gas pressure, combustion, or electrical draw?
- What maintenance schedule, filter size, warranty exclusions, and emergency procedures apply?
- If a heat pump is proposed, what capacity remains at the local winter design temperature, and when does backup heat operate?
The right answer is the system whose complete, documented proposal fits your home’s load, infrastructure, local energy prices, comfort goals, and safety requirements. Compare an electric resistance furnace with a gas furnace on delivered annual cost and total installation scope, then evaluate a heat pump separately rather than treating it as an electric furnace.
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