Furnace Replacement in Utah: Cost Drivers and What's Included
What changes furnace replacement pricing — efficiency tier, BTU sizing, vent type, ductwork condition — plus the rebate stack. Get your real installed price from our Instant HVAC Quote.
Variables
What changes the number
These are the specific factors that determine your quote — knowing them lets you compare quotes apples-to-apples instead of guessing. For your real installed price, use the get an instant hvac quote link below — it accounts for all of these automatically.
AFUE efficiency rating
80% AFUE = standard, lower upfront cost. 96%+ AFUE = high-efficiency, ~15–20% lower gas bills, qualifies for IRA credit + utility rebates. Math usually favors 96%+ for homes that run heat 5+ months/year.
BTU output (size)
Sized via Manual J. Utah elevation requires altitude derating: a 100,000 BTU rated furnace at sea level outputs about 90,000 BTU at 4,500 ft. Most Utah homes need 60,000–100,000 BTU.
Vent type
80% AFUE uses metal B-vent (existing chimney usually works). 96%+ AFUE uses 2-pipe PVC sidewall vent (we run new pipe through the wall). Switching from metal to PVC adds labor.
Variable-speed vs. single-stage blower
Variable-speed ECM blower runs quieter, dehumidifies better when paired with AC, and reduces electrical consumption. Worth it for new builds and homes with multi-zone setups.
Existing duct + plenum condition
If the existing supply/return plenum is undersized, rusted, or mis-sized for the new BTU output, we modify or replace as part of the install.
Scope
What's included vs. extra
Compare this list against any other Utah quote you receive — line items hidden in one quote and itemized in another are how the same job ends up “cheaper” on paper but more expensive after add-ons.
Included in our quote
- Manual J load calculation
- Gas furnace (80% or 96%+ AFUE) sized correctly
- New flue / vent (PVC for 96%+, metal for 80%)
- Combustion analysis at startup
- Gas line connection + leak test
- Condensate drain (96%+ furnaces only)
- Permit + inspection
- 10-year parts warranty
- 1-year labor warranty
Not included (may be extra)
- AC replacement (if pairing for a matched system, see /cost/full-system-replacement)
- Ductwork rework if existing ducts are undersized
- Gas line upsize (rare — only if BTU jumps significantly)
- Chimney liner if switching from atmospheric to direct vent
Stack the savings
Rebates & tax credits that apply
These are independent programs that can stack on the same install. We file Rocky Mountain Power and HEEHRA on your behalf; you claim the IRA credit on your taxes (we provide the AHRI certificate). The get an instant hvac quote link below shows exactly which apply to your install.
IRA Section 25C federal tax credit
96%+ AFUE ENERGY STAR furnace
Federal tax credit on your annual return for high-efficiency furnaces.
Rocky Mountain Power Wattsmart
Tier-1 / Tier-2 high-efficiency
Utility rebate for upgrading to a high-efficiency furnace.
Dominion Energy efficiency rebate
Gas furnace 96%+ AFUE
Gas-utility rebate for high-efficiency furnaces — separate from RMP.
FAQ
Frequently asked questions
Should I replace my furnace with another furnace, or switch to a heat pump?
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Depends on your gas vs. electric rate, climate exposure, and whether you have ductwork. Most Utah homes still benefit from a dual-fuel setup (heat pump + gas furnace backup) over heat-pump-only because nighttime winter temps below 5°F are common and gas heat is reliable + cheap. We model the math on every quote.
Do I need to upsize my gas line for a new furnace?
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Almost never. Most existing 1/2" or 3/4" black-iron gas lines can handle a 100K BTU furnace if the run length is reasonable. We size and pressure-test on every install.
What's the difference between 80% and 96% AFUE?
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An 80% AFUE furnace converts 80 cents of every dollar of gas to heat (20 cents goes up the flue). A 96% model converts 96 cents. Over 15 years, the savings typically exceed the higher upfront cost — and the 96% qualifies for tax credits and utility rebates that the 80% does not.
Get a real number for your home
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AC Replacement in Utah: Cost Drivers and What's Included
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Heat Pump Installation in Utah: Cost Drivers and Rebate Stack
Heat pump pricing factors and the federal + state + utility rebate stack.
Full HVAC System Replacement in Utah: What's Involved
Matched AC + furnace + coil replacement — long-term value pick for Utah homes.