The short answer
For most Salt Lake City homes, a new furnace installed runs roughly $4,000 to $10,000, with the majority landing in the middle. A basic single-stage furnace in an easy swap sits at the low end; a high-efficiency, variable-speed system — or an install that needs new venting, gas, or electrical — sits at the top. The truth is that the furnace box itself is only part of the price; the install and what your home needs drive the rest.
What actually drives the price
Four things move the number more than the brand on the box: the size and efficiency of the furnace, how hard the install is (venting, gas line, electrical, drainage, and access), whether your ductwork is the right size, and the warranty and workmanship behind it. A cheap quote often means a builder-grade unit, no real sizing work, and corners cut where you can’t see them.
Efficiency tiers — what makes sense in Utah
Two separate things affect price and performance here, and they get mixed up constantly. The first is efficiency (AFUE) — how much of your gas actually becomes heat. An 80% furnace is simpler and lower-cost and vents through a standard metal flue; a 90–97% high-efficiency furnace pulls more heat out of the same gas and saves fuel over our long winters, but it has to vent in PVC and drain its condensate — so not every home can easily take a 90%. Sometimes an 80% is the practical choice, not just the cheaper one.
The second is staging — how the furnace runs. A single-stage furnace is the budget option: full-blast on, or off. A two-stage furnace adds a gentler low setting for milder days, and a modulating furnace fine-tunes its output continuously — both cost more up front but run quieter, hold steadier temperatures, and cycle less. For a lot of Salt Lake City homes, a quality 90%+ two-stage furnace is the sweet spot. Weighing your options? Our heat pump vs. furnace guide is worth a read.
Why the cheapest quote can cost you more
The biggest hidden cost in a furnace install isn’t the equipment — it’s a system that was never sized or set up right. Skipping proper sizing, oversizing the furnace, or ignoring undersized return ducts leads to short-cycling, noise, uneven temperatures, and a shorter lifespan. A post-install inspection catches those mistakes after the fact — so you know you got the efficiency you paid for.
How to get a real number
The only way to a real price is a written quote from an installer who has actually seen your home. We do not sell or install new systems, so you get a straight read instead of a counter-bid. Already have a quote? Send it over and we’ll tell you straight if it’s fair and flag anything they left out.
Get a straight answer
Tell us what’s going on and we’ll give you clear options and upfront pricing — straight, expert work.