Nationally, a new gas furnace usually costs between $5,000 and $7,500 installed, with most homes landing somewhere around $6,000. Smaller or simpler jobs can come in under that, and high-efficiency units with ductwork or venting changes can run well over $10,000. What you will pay in the Tulsa Area depends on the size of the furnace, its efficiency, and how much work the install needs. The only way to know your number is a written quote from a furnace installation and replacement contractor who has actually looked at your house.
Here is what goes into that number, so you can read a quote with your eyes open.
Typical price ranges by furnace type
These are national installed ranges, including the unit and labor. Local prices vary with the job.
Standard-efficiency gas (80% AFUE): The standard option, vents through a metal flue. Lands at the lower end of the gas range (national).
High-efficiency gas (90 to 98% AFUE): Uses less gas, vents through PVC, needs a condensate drain. Lands at the middle to upper end, more if venting changes (national).
Electric furnace: No gas line, simpler install, higher monthly bills. Usually costs less than gas to install (national).
Heat pump with electric backup: Heats and cools with one outdoor unit. Often costs more up front than a furnace alone (national).
AFUE is the share of the gas that turns into heat in your home. An 80% furnace turns 80 cents of every gas dollar into heat. A 96% furnace turns 96 cents into heat.
What drives the price up or down
Size
Furnaces are sized in BTUs. A bigger home, an older home with less insulation, or a house with a lot of glass needs more output. Bigger is not better, though. An oversized furnace short cycles, wastes gas, and wears out early. A good contractor runs a load calculation instead of copying the number off your old unit. Our post on what size furnace you need explains how that works.
Efficiency
A high-efficiency furnace costs more up front and saves gas every winter. Whether it pays back depends on how long you plan to stay and how much you run the heat. Oklahoma winters are shorter than up north, so for some homes a standard-efficiency unit makes more sense. Ask your contractor to show you the math for your house.
Single-stage, two-stage, or variable speed
A single-stage furnace is either fully on or off. Two-stage and variable-speed furnaces can run at a lower setting most of the time. They cost more, run quieter, and keep temperatures more even from room to room.
Install conditions
This is where quotes differ the most.
Switching from an 80% to a 90%-plus furnace usually means new PVC venting and a condensate drain.
Attic installs, which are common in the Tulsa Area, take more labor than a basement or closet.
Damaged or undersized ductwork may need repair.
Permits, removal of the old unit, and a new thermostat may or may not be included.
Whether you replace the AC too
If your air conditioner is the same age as your furnace, replacing both at once can save labor and gives you a matched system. It also raises the total, so ask for the price both ways.
Is it time to replace, or can you repair?
Before you price a new furnace, make sure you need one. A furnace that is under 15 years old with a single failed part is often worth repairing. Our furnace repair techs will tell you if a repair will hold, and we cover the full decision in our furnace repair vs. replacement guide.
Replacement starts to make sense when the furnace is 15 to 20 years old, needs repairs every winter, has a cracked heat exchanger, or cannot keep the house warm.
If you are weighing it right now, schedule a visit. We will look at what you have, tell you what you need and what you do not, and show you exactly what is in the quote.
How to tell if a furnace quote is fair
A low number is not a good deal if it leaves things out. Before you sign, ask
Did you do a load calculation, or size it off the old unit?
What brand and model, and what AFUE?
Is the price all-in? Removal, permit, venting, drain, thermostat, and startup.
What does the warranty cover, parts and labor, and for how long?
Who does the install? Your company's crew, or a subcontractor?
Get the answers in writing and compare quotes line by line. If one is far cheaper than the rest, find out what is missing.
Should you also look at a heat pump?
If you are replacing your furnace and your AC is getting old too, a heat pump is worth a look. It handles heating and cooling with one outdoor unit and can pair with a gas furnace for the coldest nights. Our heat pump vs. furnace guide compares them for Oklahoma weather.
Frequently asked questions
How much does a new furnace cost to install?
Nationally, most gas furnace installs run $5,000 to $7,500. High-efficiency units and jobs that need new venting or ductwork can cost more.
Is a high-efficiency furnace worth it in Oklahoma?
Sometimes. It costs more up front and uses less gas, but Oklahoma winters are short, so the payback takes longer than in colder states. It depends on your home and how long you plan to stay.
How long does a furnace installation take?
Most straight replacements take one day. Jobs that change venting, move the furnace, or add ductwork can take longer.
How long does a new furnace last?
A well-maintained gas furnace often lasts 15 to 20 years. Annual tune-ups help it reach the long end of that range.
Should I replace my furnace and AC at the same time?
If both are close in age, replacing them together saves on labor and gives you a matched system. If your AC is newer, replacing just the furnace is fine.
A new furnace is a big purchase, and you should know exactly what you are paying for. Pilgrim serves Tulsa and the surrounding towns, and you can see all our heating services in one place. When you are ready for a real number, call 918-366-3040 or request a furnace replacement quote.