Our Top Picks
The best gas furnace for a home in 2026 is a 96 to 98 percent AFUE two-stage or modulating model with a variable-speed blower, installed by a contractor who sizes it with a load calculation. Carrier, Lennox and Trane lead on efficiency and warranty, while Goodman and Rheem deliver similar features for less. Installation quality often matters more than the nameplate.
Brand and model tiers
| Tier | Model | AFUE | Staging | Notes |
|---|---|---|---|---|
| Premium | Carrier Infinity 98 | Up to 98.5% | Modulating | Top comfort and efficiency |
| Premium | Lennox SLP99V | 99% | Variable capacity | Quiet in low-fire mode |
| Upper mid | Trane S9V2 | 97% | Two-stage, variable speed | Few repeat calls reported by installers |
| Mid | Rheem Prestige R98V | Up to 98% | Modulating | Lower cost than the big three |
| Value | Goodman GMVM97 | 98% | Modulating | Strong specs for the price |
| Value | Goodman GMVC96 | 96% | Two-stage | Reliable budget choice |
AFUE figures differ slightly between sources for some models, so confirm the exact rating on the manufacturer’s current spec sheet for the model your contractor quotes.
ACiQ 60000 BTU 80% AFUE Gas Furnace - 14" Upflow/Horizontal 1200 CFM | Single Stage Heating, 9-Speed ECM Blower, Central Forced Air Natural Gas Furnace, Efficient Home Heater, R32 Ready
Chosen because it specifies 14" Upflow/Horizontal 1200 CFM and Single Stage Heating.
View on AmazonACiQ 40000 BTU 80% AFUE Gas Furnace - 14" Upflow/Horizontal 1200 CFM | Single Stage Heating, 9-Speed ECM Blower, Central Forced Air Natural Gas Furnace, Efficient Home Heater, R32 Ready
Chosen because it specifies 14" Upflow/Horizontal 1200 CFM and Single Stage Heating.
View on Amazon
ACiQ 80K BTU 80% AFUE Gas Furnace - 17.5" Downflow/Horizontal 1600 CFM | Single Stage Heating, 9-Speed ECM Blower, Central Forced Air Natural Gas Furnace, Efficient Home Heater, R32 Ready
Chosen because it specifies 17.5" Downflow/Horizontal 1600 CFM and Single Stage Heating.
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Revolv 70,000 BTU 80% AFUE Mobile Home Gas Furnace | Front Return Downflow | Manufactured Home Indoor Unit (Coil Cabinet Included) | MG1E-B070F1ABM1
Chosen because it specifies 000 BTU 80% AFUE Mobile Home Gas Furnace and Front Return Downflow.
View on AmazonThe picks
Carrier Infinity 98: best overall comfort
A modulating furnace that adjusts heat in small steps, keeping rooms near the thermostat setting. Choose it for large or multi-level homes where temperature differences bother you.
Lennox SLP99V: best efficiency
Rated at 99 percent AFUE and known for quiet low-fire operation. A strong fit for cold climates with long heating seasons.
Trane S9V2: best for service reliability
A two-stage, variable-speed furnace at 97 percent AFUE. Installers often report fewer repeat service visits for Trane and sister brand American Standard.
Rheem Prestige R98V: best mid-price modulating
A modulating unit at up to 98 percent AFUE that sits between the premium brands and Goodman on price.
Goodman GMVM97: best value modulating
Modulating at 98 percent AFUE for a few thousand dollars less than Carrier or Lennox equivalents. Warranty length and dealer support differ, so compare terms.
Goodman GMVC96: best budget two-stage
A 96 percent two-stage furnace that suits mild-to-moderate climates and tight budgets.
Single, two-stage or modulating
- Single-stage: cheapest, runs at full output only; rooms swing in temperature.
- Two-stage: runs on low most days and on high in cold snaps; quieter and more even.
- Modulating: output varies in small increments; the most even and efficient, at higher cost.
A two-stage gas valve is less precise than the top modulating models, but a properly sized, well-installed mid-range furnace on good ductwork beats an expensive modulating unit on poor airflow.
Space, venting and electrical needs
- Dimensions: common widths are 14, 17.5, 21 and 24.5 inches, with heights of about 33 to 40 inches. Measure the closet, attic or basement area.
- Venting: a 90 percent plus furnace uses PVC pipe for intake and exhaust, plus a condensate drain.
- Gas line: existing lines may need resizing for larger BTU input.
- Power: a 120-volt circuit for the blower and controls.
- Safety: CO alarms on every floor and near bedrooms.
What to ask the contractor
- Did you run a Manual J load calculation for my house?
- What is the static pressure of my duct system and will it work with a variable-speed blower?
- What does the labor warranty cover and for how long?
- Is the quote for a matched system if I plan to replace the AC soon?
Frequently asked questions
Is 98 percent AFUE worth the extra cost?
In cold regions with high gas prices, often yes. In mild regions, a 96 percent unit usually has a better payback.
How long will it last?
Often 15 to 20 years with yearly maintenance and clean filters.
Should I replace the AC at the same time?
If the AC is old, replacing both gives matched airflow and a single warranty.
Decision matrix by home type
| Situation | Recommended tier | Why |
|---|---|---|
| Cold climate, 2,500 sq ft two-story home | Carrier Infinity 98 or Lennox SLP99V | Long heating season rewards efficiency and even heat |
| Moderate climate, 1,800 sq ft ranch | Trane S9V2 or Rheem R98V | Balanced features and price |
| Mild climate, small home or rental property | Goodman GMVC96 | Lower cost with solid efficiency |
| Open floor plan with a light sleeper | Any modulating model | Low-speed operation keeps noise down |
Maintenance that protects the warranty
- Change the filter every one to three months for 1-inch filters.
- Schedule an annual tune-up before the heating season to check the burners, heat exchanger and vent.
- Keep the area around the furnace free of storage and chemicals.
- Clear the condensate drain and trap on condensing models so it does not clog and shut the unit down.
- Register the furnace with the manufacturer within the time window given, since some extended warranties require it.
Many makers require proof of professional installation and regular maintenance for the full parts warranty, which is often 10 years. Keep your invoice and service records in one folder.
