Replacing a gas furnace in Utah typically costs $4,000 to $8,500 installed. These are estimates. The low end is a standard-efficiency furnace swapped into an easy location, and the high end is a high-efficiency, variable-speed furnace that needs new venting. Size, efficiency, and how much the venting and ductwork have to change drive the price.
What drives the price
- Efficiency: 80% versus 95% and higher
- Blower and burner type: single-stage, two-stage or variable
- Venting: high-efficiency furnaces need new plastic vent pipe and a condensate drain
- Size, which should come from a load calculation
- Permit and inspection fees
80% or 95%
A 95%-plus furnace turns more of the gas you pay for into heat, and Utah’s heating season is long enough for that to matter. It costs more and needs different venting. If routing the new vent is simple, high efficiency is usually worth it. If it is difficult, an 80% furnace can be the sensible choice.
Altitude matters
Gas furnaces produce less heat at elevation and have to be adjusted for it. This is routine for a Utah installer, but it is one reason sizing by the old furnace’s label is not reliable.
When to replace
Most furnaces last 15 to 20 years. Replace when the heat exchanger is cracked, when a repair costs a large share of a new furnace, or when the furnace is old and you are already replacing the air conditioner.
Frequently asked questions
How much does a new furnace and AC cost together in Utah?
As a rough estimate, $10,000 to $18,000 installed for most homes, depending on size and efficiency. Replacing both together usually costs less than doing them separately.
Are there rebates?
Utility rebates for high-efficiency equipment change from year to year. We check current offers when we quote.
Can I finance a furnace?
Yes. 0% financing options are available, subject to credit approval.
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