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Furnace Replacement Cost in Iowa: 2026 Prices for Gas, Propane, and High-Efficiency Units
Furnace replacement in Iowa costs $4,200 to $8,000 for a standard unit and $6,500 to $12,000 for a condensing furnace in 2026. Compare gas, propane, and rebates.
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Furnace Replacement Cost in Iowa: 2026 Prices for Gas, Propane, and High-Efficiency Units
The furnace in a 1978 split-level in Ames quits on a January night when the temperature is 8 below. The homeowner calls three contractors the next morning.
The first can come Thursday and quotes $6,800 for a two-stage 96 percent furnace. The second can come tomorrow and quotes $8,400 for a similar unit. The third quotes $4,900 for an 80 percent single-stage and can install it this afternoon.
Every one of those prices is normal for Iowa in 2026, and the spread shows how much the details matter. Across the state, a standard 80 percent efficiency gas furnace runs about $4,200 to $8,000 installed, and a 95 to 98 percent condensing furnace runs $6,500 to $12,000.
Propane furnaces for rural homes cost about the same as natural gas. Electric furnaces are cheaper to buy and expensive to run. All of those figures are approximate and depend on the house, the contractor, and the season.
Iowa's winters are colder than most of the Midwest. Mason City, Decorah, and Spencer sit in climate zone 6 with January averages in the teens and regular stretches below zero. Des Moines, Cedar Rapids, and Davenport are in zone 5 and slightly milder.
Keokuk and the southern tier are milder still. A furnace here runs hard for five months, which changes both the sizing and the efficiency math.
What Iowa Homeowners Pay, by Scenario
Prices cluster around a few common situations. The table below shows what each looks like for a typical 1,600 to 2,200 square foot Iowa home in 2026, with installation included.
| Scenario | Typical installed cost |
|---|---|
| 80 percent single-stage gas furnace, straight swap | $4,200 to $6,500 |
| 80 percent two-stage gas furnace | $5,000 to $8,000 |
| 96 percent single-stage condensing furnace | $6,500 to $9,000 |
| 96 to 98 percent two-stage or modulating condensing furnace | $8,000 to $12,000 |
| Propane furnace, any tier | Add $100 to $400 for conversion |
| Electric furnace | $2,800 to $6,000 |
| Furnace plus new central air conditioner | $10,000 to $18,000 |
The straight swap at the top of the table assumes the old furnace was an 80 percent unit venting through an existing metal flue or chimney, so the new one uses the same path. Moving to a condensing furnace adds PVC intake and exhaust piping through a rim joist or side wall, a condensate drain, and often a condensate pump, which is most of the price jump between the second and third rows.
The last row deserves attention. Many Iowa homeowners replace the furnace and air conditioner together because the two share a blower and a coil, and a new furnace paired with a 20 year old condenser will not run efficiently. Contractors discount the combined job, and the bundled price is typically $1,500 to $3,000 less than doing the two separately.
Labor, Permits, and What an Iowa Install Involves
Labor accounts for $1,500 to $4,000 of a furnace replacement in Iowa. Des Moines, West Des Moines, Ankeny, and Iowa City have the highest HVAC labor rates in the state.
Cedar Rapids, Davenport, Waterloo, Dubuque, and Sioux City are slightly lower. Small towns are lower still, though the nearest qualified contractor may be 40 miles away and charge for the drive.
Most Iowa cities require a mechanical permit for a furnace replacement. Des Moines, Cedar Rapids, Iowa City, and Davenport each run their own inspection programs, and the fee is typically $50 to $150. The Iowa Plumbing and Mechanical Systems Board licenses HVAC contractors statewide, and any installer should carry an active license and pull the permit under it.
A basic replacement takes one day. The crew disconnects the gas and electrical, removes the old unit, sets the new furnace on the existing plenum, connects the supply and return, reconnects gas with a new shutoff and drip leg if needed, wires the thermostat, and tests. Adding side wall venting or a chimney liner for the water heater extends the job into a second day.
Chimney Liners in Older Iowa Homes
Many pre-1960 homes in Davenport, Dubuque, Burlington, Council Bluffs, and the older parts of Des Moines vent the furnace and water heater through a shared brick chimney. When the furnace switches to side wall PVC venting, the water heater is left venting alone into a chimney far too large for it. The exhaust cools and condenses on the brick, which eats the mortar and can cause backdrafting.
The fix is a stainless steel or aluminum chimney liner sized for the water heater, and it costs $900 to $2,200 installed. Contractors sometimes leave this out of the initial quote and add it after the inspection, so ask about it up front if your water heater vents through a chimney.
Natural Gas Versus Propane in Rural Iowa
MidAmerican Energy, Alliant Energy, and Black Hills Energy supply natural gas to the cities and most larger towns. Outside those service areas, propane is the fuel for a large share of rural Iowa farmhouses and acreages. A propane furnace is the same equipment as a gas furnace with a conversion kit for the different pressure and orifice size, and the kit adds $100 to $400.
The operating cost is where propane differs. Propane in Iowa runs $1.50 to $2.50 per gallon depending on the season and whether the homeowner locks in a summer fill contract.
At those prices, heating with propane costs 50 to 100 percent more than heating with natural gas for the same house. That makes a 96 percent furnace a clearer win for propane homes, because the savings from efficiency are larger in dollar terms.
Some rural homeowners look at a dual fuel setup: a heat pump handles the shoulder seasons and mild winter days at Iowa's relatively low electric rates, and the propane furnace takes over below about 20 degrees. The combined cost is $12,000 to $20,000, but propane use can drop by half or more.
Efficiency Choices for Iowa's Climate
A house in Mason City with a $1,800 annual gas bill on an old 78 percent furnace would spend about $1,460 with a 96 percent unit, saving roughly $340 a year. In Ottumwa the same house might save $250 because the winter is shorter. Either way the condensing furnace pays back its premium over an 80 percent model in six to ten years, well within the unit's expected life.
Two-stage operation matters more in Iowa than in warmer states because the range between a 35 degree November day and a 15 below January night is so wide. A single-stage furnace sized for the coldest night is oversized for the rest of the season and cycles on and off constantly. A two-stage unit runs on low most of the time, which is quieter, evens out temperatures, and keeps the blower moving air for better filtration.
Modulating furnaces add another $1,500 to $2,500 and are worth it in large homes, homes with uneven heating between floors, and homes where comfort is the priority. For a typical Iowa ranch or split-level, two-stage is enough.
Rebates and Programs in Iowa
MidAmerican Energy and Alliant Energy both run energy efficiency programs with rebates for high-efficiency furnaces, typically $100 to $400 for a qualifying 95 percent or higher unit with an efficient blower motor. Black Hills Energy offers similar incentives in its Iowa territory. The equipment has to meet the program's specifications and the contractor usually files the paperwork, so confirm the rebate before the install rather than after.
The federal 25C tax credit that had covered 30 percent of a qualifying furnace up to $600 expired for equipment placed in service after December 31, 2025, so it is not available for 2026 installations. Manufacturer promotions of $100 to $500 run in spring and fall, and many Iowa contractors offer zero interest financing for 12 to 18 months during the slow season.
Income-qualified households can apply to the Iowa Weatherization Assistance Program through their local community action agency. The program replaces unsafe or failing furnaces at no cost to the homeowner and also addresses insulation and air sealing. When you start gathering quotes, the HVAC contractors listed for Iowa can help you compare local options.
Best Time to Replace a Furnace in Iowa
The Ames homeowner in the opening paid a premium for speed because January is the worst month to shop. Contractors are booked with emergency calls, equipment is in short supply, and there is no time to compare bids. A furnace that is 18 years old and needed a repair last winter should be replaced in the off season on your own schedule.
April through June and September through mid-October are the best windows. Contractors have open calendars, equipment is in stock, and off-season discounts of 5 to 10 percent are common. Replacing in the fall also lets you add an air conditioner in the same visit at a bundled price and have both ready for the following year.
If the furnace is running but showing its age, get quotes now and schedule for the shoulder season. Three written bids with the same equipment specifications is the single best way to know whether a price is fair. For more local pricing guides across the state, the Iowa blog has other home service articles.
Frequently Asked Questions
How much does it cost to replace a furnace in Des Moines?
A standard 80 percent furnace runs about $4,800 to $8,000 installed in the Des Moines metro, and a 96 percent condensing furnace runs $7,000 to $12,000. Des Moines labor rates are the highest in Iowa.
Is propane or natural gas cheaper to heat with in Iowa?
Natural gas by a wide margin, typically 50 to 100 percent less for the same house. Propane homes benefit more from a 96 percent furnace because each unit of fuel saved is worth more.
Do I need a permit to replace a furnace in Iowa?
Most cities require a mechanical permit costing $50 to $150, and the contractor should pull it under their state license. Rural areas outside city limits may not require one, but the installer should still be licensed.
How long does a furnace last in Iowa?
Fifteen to twenty years is typical, with the cold winters putting more hours on the unit than in southern states. A furnace past 15 years with a major repair bill is usually a replacement candidate.
Are there furnace rebates in Iowa for 2026?
MidAmerican, Alliant, and Black Hills Energy offer $100 to $400 for qualifying high-efficiency furnaces. The federal tax credit expired at the end of 2025.
Should I replace my furnace and AC at the same time?
If the air conditioner is over 12 years old, usually yes. The bundled price is typically $1,500 to $3,000 less than two separate jobs, and matched equipment runs more efficiently.