What's the best furnace efficiency rating for Utah?
For most Utah homes, a 96% AFUE two-stage or modulating furnace is the best long-term choice — the higher efficiency pays back within 8-10 years on Wasatch Front winter gas bills, and staging prevents the hot/cold cycling that single-stage 80% units cause.
For most Utah homes, a 96% AFUE two-stage or modulating furnace is the best long-term choice — the higher efficiency pays back within 8-10 years on Wasatch Front winter gas bills, and staging prevents the hot/cold cycling that single-stage 80% units cause.
For most Utah homes, a 96% AFUE (modulating or two-stage) furnace is the sweet spot. Running 4-5 months of heating, the gas savings over an 80% unit typically pay back the price difference in 8-10 years on Wasatch Front utility rates.
The bigger comfort win is staging: a two-stage or modulating burner runs longer at lower output, which smooths out temperature swings and is much quieter.
Exceptions where 80% still makes sense: you're on a metal chimney with no easy path to run PVC venting, you're a landlord optimizing for lowest install cost, or the home is very small and the gas savings math doesn't clear the price premium.
We run the actual payback calculation for your home's square footage and gas rate before recommending.
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Last reviewed April 1, 2026.