Skip to content 
A new furnace costs $3,800 to $10,000 installed in Claremore in 2026. The unit itself is usually only 35 to 45 percent of that. Labor, ductwork, venting and permit make up the rest. Priced separately, furnace installation in Claremore stops being a mystery number.
Written by Ricky Roberts, Owner, Oklahoma mechanical licence 099177, licensed 7 years
In this article: the unit price on its own, the labor price on its own, what ductwork really adds, AFUE tiers priced out, and the line items that should appear on any honest furnace quote.
Key Takeaways
- Installed total. $3,800 to $10,000 for a residential gas furnace in the Claremore and Tulsa market.
- The unit alone. $1,100 to $3,200 at the equipment level, depending on AFUE and staging.
- Labor alone. $1,200 to $2,800 for a standard swap, more for a venting change or attic work.
- Ductwork is separate. Nothing if the ducts are sound, $2,000 to $5,000 if they are not.
- 96 percent AFUE is not automatic. On Oklahoma gas prices and a short heating season, 80 percent often wins the arithmetic.
How Much Does a New Furnace Cost in Claremore?
A new gas furnace costs $3,800 to $10,000 installed in Claremore in 2026. Most homeowners pay $4,500 to $7,000 for a correctly sized mid-efficiency unit on existing ductwork. The equipment is $1,100 to $3,200 of that. Labor is $1,200 to $2,800. Venting, permit, thermostat and haul-away make up the balance.
That is for a standard residential gas furnace. Electric furnaces and propane units price differently, and both are covered further down.
The Three Prices Hiding Inside One Quote
Contractors quote a single total because it is simpler to say. It is also where confusion starts. Break it into three and every quote becomes comparable.
| Component | Typical 2026 cost | Share of total |
|---|---|---|
| The furnace unit | $1,100 to $3,200 | 35 to 45 percent |
| Installation labor | $1,200 to $2,800 | 30 to 40 percent |
| Venting and gas line work | $300 to $1,500 | 5 to 15 percent |
| Permit and inspection | $100 to $500 | 2 to 5 percent |
| Thermostat | $0 to $400 | 0 to 5 percent |
| Haul away and disposal | $60 to $300 | 1 to 3 percent |
| Ductwork, if needed | $0 to $5,000 | 0 to 40 percent |
When two quotes are $2,000 apart, the gap is almost never the badge on the furnace. It is the ductwork scope, the venting, or whether commissioning is included.
Furnace Unit Cost by Efficiency and Staging
AFUE is the percentage of fuel a furnace turns into heat. An 80 percent unit sends a fifth of the fuel up the flue. A 96 percent unit sends four percent. ENERGY STAR certified models carry higher AFUE ratings and more efficient blower motors than standard models, per the ENERGY STAR furnace criteria.
| Type | AFUE | Unit only | Installed |
|---|---|---|---|
| Single stage, standard | 80 percent | $1,100 to $1,700 | $3,800 to $5,500 |
| Two stage, standard | 80 percent | $1,400 to $2,000 | $4,400 to $6,200 |
| Single stage, condensing | 92 to 95 percent | $1,600 to $2,300 | $5,000 to $7,200 |
| Two stage, condensing | 95 to 96 percent | $2,000 to $2,800 | $5,800 to $8,500 |
| Modulating, variable speed | 96 to 98 percent | $2,600 to $3,200 | $7,000 to $10,000 |
| Electric furnace | n/a | $900 to $2,000 | $2,800 to $6,000 |
Why 80 percent still makes sense in Oklahoma
Two Oklahoma facts change this calculation. Residential natural gas averaged $13.99 per thousand cubic feet in 2024, per the Oklahoma residential gas prices series from the U.S. Energy Information Administration, which is not expensive fuel. And the heating season here is short and concentrated: Tulsa area homes accumulated 618 heating degree days in December 2024 and 936 in January 2025, according to Tulsa heating degree days records from the National Weather Service, with far less load either side.
Fewer heating hours and cheaper gas means the fuel saved by a 96 percent furnace is worth less here than in Minnesota. A condensing furnace also needs a new PVC flue and a condensate drain, which adds $500 to $1,500 of install work that an 80 percent unit does not. For many Claremore homes the honest answer is that 80 percent two stage is the better buy, and the difference is better spent on ductwork.
Furnace Cost by Home Size
Sizing is done by heat loss calculation, not by square footage alone. Insulation, window area and ceiling height all matter. Use this to set a budget, not to order equipment.
| Home size | Typical output | 80 percent installed | 95 percent installed |
|---|---|---|---|
| Under 1,200 sq ft | 40,000 to 60,000 BTU | $3,800 to $5,000 | $5,000 to $6,500 |
| 1,200 to 1,800 sq ft | 60,000 to 80,000 BTU | $4,200 to $5,600 | $5,500 to $7,200 |
| 1,800 to 2,400 sq ft | 80,000 to 100,000 BTU | $4,800 to $6,400 | $6,200 to $8,200 |
| 2,400 to 3,000 sq ft | 100,000 to 120,000 BTU | $5,400 to $7,000 | $6,900 to $9,000 |
| Over 3,000 sq ft | 120,000 BTU or zoned | $6,000 to $7,800 | $7,600 to $10,000 |
An oversized furnace short cycles. It blasts heat, satisfies the thermostat in minutes, shuts off, and starts again. That wears the ignitor and the inducer, leaves cold rooms far from the unit, and costs more to run than the right size would.
What the Ductwork Really Adds
This is the line that separates a $4,500 job from an $8,500 one, and it has nothing to do with the furnace.
- Ducts test sound. No cost. Reuse them.
- Sealing and minor repair. $500 to $1,500. Sealing leaking seams and reconnecting dropped runs.
- Partial replacement. $1,200 to $2,500. Replacing the worst branches and the plenum.
- Full replacement. $2,000 to $5,000. Whole system, usually in an older home or after a remodel.
- Return air correction. $400 to $1,200. Undersized returns are extremely common and choke the new blower.
A new furnace on leaking ducts heats the crawlspace. If the quote says nothing about duct condition, the contractor has not looked. The duct repair and installation scope should be written down before the equipment is ordered.
Every Line That Belongs on a Furnace Quote
- Model number and BTU output. Written down, not described.
- AFUE and staging. 80 or 95, single stage, two stage or modulating.
- Heat loss calculation. The sizing basis, not a rule of thumb.
- Labor hours and rate. Separated from the equipment.
- Venting. Reusing the existing flue, or new PVC for a condensing unit.
- Gas line and electrical. Any sizing change, new disconnect or breaker work.
- Condensate drain. Required on condensing furnaces, and it has to go somewhere legal.
- Ductwork scope. Nothing, sealing, partial or full, with a price on each.
- Thermostat. Reused or new, and compatible with the staging you bought.
- Permit and inspection. Required work, and it belongs on the paper.
- Startup and commissioning. Gas pressure set, temperature rise measured, airflow verified.
- Warranty. Parts term, labor term, and who registers the equipment.
Temperature rise is the one to insist on. A furnace running outside its rated rise band will crack a heat exchanger years early, and it takes a technician ten minutes to measure and set it.
When a New Furnace Beats One More Repair
- Find the age. The data plate inside the burner door carries a manufacture date. Gas furnaces last 15 to 20 years.
- Run the age times cost rule. Age in years times the repair quote. Over roughly $5,000 says replace.
- Check the heat exchanger. A confirmed crack on a furnace past 15 years ends the discussion.
- Count the repairs. Two or more in two years is a pattern.
- Ask about parts. Discontinued boards and inducers mean longer downtime every time it fails.
- Consider the AC. If the air conditioner is also near end of life, doing both together saves a second mobilisation and matches the blower to the coil.
Working through those six with a licensed technician takes twenty minutes. Call Cool Down Heating and Air at (918) 527-6792 for a heat loss calculation and a written quote with every line broken out. Free second opinions on any quote you already have. The detailed repair numbers, if you are still weighing a fix, are in the furnace repair cost guide.
How to Keep the Number Down
- Buy in the shoulder season. September and October, before the first freeze fills every schedule.
- Take 80 percent two stage over 95 percent single stage. On a short Oklahoma heating season, staging buys more comfort than AFUE buys savings.
- Spend the difference on ducts. Sealing returns better comfort per dollar than an efficiency tier upgrade.
- Insist on a heat loss calculation. Right sizing is free and oversizing is not.
- Register the warranty. Most manufacturers halve the parts term if you miss the 60 to 90 day window.
- Verify the licence. Oklahoma mechanical contractors are licensed by the state Construction Industries Board, and anyone can check a name free with the Oklahoma license verification tool.
- Get three itemised quotes. Compare the lines, not the totals.
New Furnace Cost Questions Claremore Homeowners Ask
How much does it cost to replace a furnace for a 2,000 sq ft house?
Expect $4,800 to $8,200 installed in the Claremore area for a 2,000 square foot home, typically on an 80,000 to 100,000 BTU furnace. An 80 percent efficiency unit on sound ductwork sits near the bottom of that range. A 95 percent condensing unit with new venting sits near the top.
Is it worth replacing a 30 year old furnace?
Yes. At 30 years a furnace is a decade past its expected life, parts are discontinued, and the heat exchanger has been through thousands of heating cycles. Any repair over a few hundred dollars is money spent on equipment that will fail again, most likely in the coldest week of the year.
How much is a furnace for a 1,500 square foot house?
$4,200 to $7,200 installed in Oklahoma, on a 60,000 to 80,000 BTU unit. The spread comes from efficiency tier and ductwork. A like-for-like 80 percent swap on good ducts is the cheap case, a 95 percent condensing unit needing new PVC venting is the expensive one.
What is the average lifespan of a furnace?
Fifteen to 20 years for a gas furnace. Maintained units reach the top of that band, neglected ones fall short. Oklahoma’s heating season is short but intense, so an annual furnace tune-up in Claremore and regular filter changes matter more than total run hours do.
What is the $5,000 rule for HVAC?
Multiply the age of the system in years by the repair estimate. Over $5,000 usually means replacement is the better spend. A 10 year old furnace with a $350 repair scores 3,500, so repair it. A 22 year old furnace with a $400 repair scores 8,800, so replace it.
Does a new furnace need new ductwork?
Not usually. Sound, correctly sized ductwork can be reused for decades. What often does need work is the return air, which is undersized in many older Claremore homes and will choke a modern variable speed blower. A contractor should test static pressure before answering this for your house.
Get a Furnace Quote With the Unit, Labor and Ductwork Priced Separately
Call Cool Down Heating and Air at (918) 527-6792 and ask for a heat loss calculation plus a written quote that separates the unit, the labor, the venting and the ductwork. You will talk to a licensed Oklahoma mechanical contractor, not a call center. Free second opinions on any quote you already have. Service runs 24/7 across Claremore, Tulsa, Owasso, Catoosa, Verdigris, Collinsville and Broken Arrow. You can also request a written estimate online.
Cool Down Heating and Air
24606 US RTE 66 #4
Claremore, OK 74019
Phone: (918) 527-6792
Hours: Open 24 hours, 7 days a week
Website: https://www.cooldownheatandair.org/
Service area: Claremore, Tulsa, Owasso, Catoosa, Verdigris, Collinsville, Broken Arrow and nearby Northeast Oklahoma communities
About the Author
Ricky Roberts is the owner of Cool Down Heating and Air in Claremore, Oklahoma, and holds Oklahoma mechanical licence 099177. He has been licensed for seven years and has run the company since 2019, serving homeowners and light commercial customers across Rogers County and the Tulsa metro. Learn more on the Cool Down about page.
