Reliable Heat
When You Need It Most
Trane gas furnaces range from 80% to 97% AFUE, with single-stage, two-stage, and variable-speed options — so you can find the right fit for your home and budget.
Furnace Efficiency Tiers
Organized by AFUE (Annual Fuel Utilization Efficiency) — the higher the rating, the more heat you get per dollar of gas.
Premier 97 — Maximum Efficiency
Trane's top-tier furnace at 97% AFUE, with a variable-speed blower and variable-speed draft inducer for the quietest, most efficient heat (formerly the S9V2-VS).
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Premier 96 — Ultra Efficiency
A high-efficiency, two-stage furnace at 96% AFUE with a variable-speed blower (formerly the S9V2).
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Priority 96 — Super Efficiency
Up to 96% AFUE with a constant-torque blower motor — strong efficiency at a lower price point than variable-speed models (formerly the S9X2).
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Priority 80 — Reliable Efficiency
Meets the federal minimum with room to spare at 80% AFUE — dependable heat at the most accessible price point (formerly the S8X2).
View on Trane.comEfficiency Comparison & Video
Specifications based on Trane's official S-Series furnace brochure. Contact us to confirm current availability for your home.
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