Heat Pump vs Gas Furnace in Oklahoma: The Question That Actually Decides It

People ask me which is better, a heat pump or a gas furnace. I answer with a question of my own: what are you heating with, natural gas, propane, or nothing but electricity. That single fact decides more than any brochure comparing efficiency numbers. I’m Dave Hartzell, 47 years in HVAC, started at 18, running Hartzell’s Heat & Air out of Kingfisher for 15+ years, a Trane dealer for 10, Trane TCS SELECT. I install heat pumps, gas furnaces, and systems that run both. I don’t have a favorite to sell, just a house in front of me and a fuel bill behind it.

4.8 stars, 300+ Google reviews, a lot of them from people who called with this exact question.

Why This Isn’t Really a Furnace vs Heat Pump Question

A gas furnace makes heat, burning fuel to produce the same amount whether it’s 40 degrees outside or 4. A heat pump doesn’t make heat, it moves heat, pulling warmth out of outside air even when that air feels cold. There’s less heat to move as the air gets colder, so its capacity and efficiency both fall off some. Neither is a flaw, they’re two different jobs, and which fits your house depends on the fuel you already burn and how cold it gets.

Where Geothermal Fits Into This

There’s a third option. A geothermal heat pump moves heat the same way, pulling it from the ground instead of the air, which holds a steadier temperature. That’s a bigger conversation with a loop involved, and I sell it statewide across Oklahoma, IGSHPA accredited. The rest of this page covers the air source heat pump, the kind that sits outside and looks like an AC, since that’s what people weigh against a furnace.

If You’re on Natural Gas

If you’ve already got a gas line to the house, that’s not nothing. A gas furnace is a known, efficient way to make heat, and ripping out a working one just to go all electric is rarely the move I’d recommend. It gets interesting on the AC side: when your air conditioner is due anyway, replacing it with a heat pump and keeping the gas furnace as backup gives you dual fuel without starting from zero, heat pump running the mild months, furnace on the coldest mornings. I’d rather see your furnace’s condition than guess over the phone.

If You’re on Propane

Propane is trucked in and priced differently than piped natural gas, and rates move enough by season and supplier that I won’t print a number here that stays accurate. What I will say: a lot of propane households lean on a heat pump as the primary heat source, holding the propane furnace in reserve for the handful of nights it actually earns its keep. That flips the usual order, propane goes from everyday fuel to backup, and for a lot of my customers that’s the whole reason the switch pays off. It depends on your contract and your house.

If You’re All Electric

If you’re already all electric, heating with straight resistance heat or an electric furnace, a heat pump is close to the whole conversation. Straight resistance heat gives you exactly one unit of heat back for every unit of electricity, no more. A heat pump takes that same electricity and moves multiple units of heat instead, transferring heat rather than creating it, keeping that advantage even in cold weather, just a smaller one. Electric backup still has a place on the coldest mornings, but as the everyday system a heat pump wins almost every time.

Dual Fuel: Both Systems, One Thermostat

Dual fuel isn’t a compromise, it’s the right answer for a lot of houses. You get a heat pump and a furnace, gas or propane, wired to the same control board, and the system picks which one runs based on outdoor temperature. Above a set point the heat pump runs because it’s more efficient there, below it the furnace takes over. I set that switchover point in the field for your house and your fuel, not off a generic chart, because it depends on what you’re actually paying for each fuel.

How Cold Does It Actually Get Here

Heat pump ratings come from the AHRI 210/240 test conditions: 47 degrees outdoor for high temperature heating, 17 for low, 95 for cooling. The ENERGY STAR county table puts the 99 percent heating design temperature at 13 degrees in Kingfisher, Canadian, Oklahoma, Garfield, Logan and Major, 15 in Blaine, 2 to 4 degrees below that 17 degree point. Read it honestly: about one percent of a year’s hours run colder, which is what backup heat and dual fuel are for. The same table puts the 1 percent cooling design temperature at 99 to 101, hotter than the 95 degree point.

SEER2 and HSPF2, What the Ratings Actually Cover

SEER2 measures cooling season efficiency, HSPF2 measures heating season efficiency on a heat pump. For equipment made on or after January 1, 2023, the national floor for a split system heat pump, Oklahoma included, is 14.3 SEER2 and 7.5 HSPF2. Single package units are a different class. Oklahoma sits in the Department of Energy’s Southeast region, which adds a SEER2 floor for air conditioners installed here and, unlike the Southwest, sets no EER2 minimum. That add-on covers air conditioners, not heat pumps, so a heat pump answers to the national floor. What matters is the rating on the matched system you buy.

What the Manufacturer Warranty Actually Covers

Trane’s limited warranty comes in two versions, base and registered. The difference is a form. It has to be registered online within 60 days of the commencement date, when install and startup finish. Miss that window and the base terms apply automatically, no penalty, just a shorter clock. How long each runs depends on the model family, so I hand you the certificate for your equipment. Either way it buys the part, not the labor to install it. My post-install email sends you the link to register the equipment.

What a Hard Oklahoma Winter Does to Each Choice

On February 16, 2021, Oklahoma City dropped to 14 below zero, the coldest official reading there since 1899, according to the National Weather Service in Norman and the Oklahoma Mesonet’s write-up of that month. That is not a design day, it is the reason I do not size a house for 13 degrees and walk away. At that kind of cold an air source heat pump is moving far less heat, and the backup carries most of the load: electric strip heat on a straight heat pump, or the gas furnace on a dual fuel system. I tell every customer the same thing, so you are not surprised on the worst night of the year.

Two more Oklahoma facts. A gas furnace still needs electricity for its igniter and blower, so neither system heats a house through a long power outage by itself. And ice storms are part of life here: freezing rain can glaze the outdoor unit. During a normal defrost cycle you will see steam and frost come off the outdoor coil, and that is the system working. If the fan cannot turn because of ice, do not chip at the coil. Turn the system to off and call 405-375-4822.

What I Actually Recommend, House by House

I look at three things before I recommend anything: what fuel is already at the house, what shape the furnace is in, and what the ductwork can carry. Here is how it usually lands.

• Natural gas, furnace still in good shape, AC due: a heat pump with the existing furnace kept as backup, which is dual fuel. You are not paying to replace a furnace that works, and the coldest nights stay on gas.
• Natural gas, furnace and AC both near the end: I price two options and put both numbers in front of you, a matched heat pump with a gas furnace and a standard AC with a gas furnace. Which one wins depends on what you pay for gas and electricity, so I do not pick it for you before I have the bills.
• Propane: a heat pump as the everyday heat and the propane furnace in reserve, for the reasons above.
• All electric, strip heat or an electric furnace: a heat pump. It is close to the whole conversation.
• Any house with weak or leaky ductwork: I fix or size around the ducts first. A heat pump moves a lot of air at a lower temperature, and bad ducts hurt it more than they hurt a furnace.

One thing to expect: the air from a heat pump register is warm, but noticeably cooler than the blast from a gas furnace, and some people read that as the system blowing cold air. It is normal, and I will tell you that before the first cold morning instead of after.

Is There a Rebate on a Heat Pump Near Kingfisher?

It depends on who sends your electric bill. Cimarron Electric Cooperative’s 2026 program lists $500 for an air source heat pump, dual fuel included, on new equipment, with a $1,200 cap per member per home per year. You apply and receive the rebate, and I help with the application and give you the equipment details and paperwork Cimarron asks for. Programs change by utility and program date, so tell me your electric utility and ZIP code and I will check the current official program before anyone quotes you an amount. Customers on a city utility, or on a different co-op, have different programs.

More on This

See my pages on heat pump installation, heat pump maintenance, heat pump repair and geothermal heat pumps.

What It Costs to Find Out What You Have

A standard residential service call is $210 total: $99 dispatch plus $111 diagnostic. The $111 diagnostic is not credited or refunded. After hours emergency is $309 flat, non refundable. A standalone AC tune-up runs $229. A full replacement is different, the new-system estimate is free, I need to see the house. If cost is the barrier, I work with six financing partners: Hearth, Synchrony, Wells Fargo, Wisetack, Klarna, JB Financing, covering repairs and add-ons too. My maintenance plans start at One Visit Spring or Fall 360, $199 a year. Full Year 360 at $499 adds a 10 percent repair discount up to $300 and waives the emergency dispatch fee twice a plan year, the $111 diagnostic still applies.

Frequently Asked Questions

Can a heat pump heat a house in Oklahoma without a furnace backing it up?

Yes, plenty of my customers run heat pump only, especially on all electric houses. Sized correctly, it handles the coldest mornings too, depending on the house and what you’re comfortable with.

What decides when a dual fuel system switches from the heat pump to the furnace?

Outdoor temperature, at a balance point I set on the control board for your house and fuel costs. Above it the heat pump runs, below it the furnace takes over, not a fixed number across every house.

I’m on propane, is a heat pump actually going to help me?

For a lot of propane households, yes, the heat pump becomes the everyday heat source and propane becomes the backup fuel instead of the main one. Pricing is local and moves with the season, so I’ll walk through your actual numbers.

Does a heat pump stop working when it gets below freezing?

No. It keeps working, just moving less heat a little less efficiently as it gets colder, which is physics, not a malfunction. About one percent of the hours in a year run colder than the design temperature, which is what backup heat is for.

Is a heat pump the same thing as geothermal?

No. Both move heat instead of making it, but an air source heat pump pulls it from outside air, a geothermal one pulls it from the ground through a loop. The ground holds a steadier temperature, a bigger conversation, and I sell it statewide.

Do I have to tear out my furnace to add a heat pump?

No, that’s exactly what dual fuel is. You keep the furnace, add a heat pump, and wire both to the same thermostat, with the furnace handling only the coldest stretches. It’s a common upgrade when an AC is already due.

How much does it cost to run a heat pump versus a furnace?

Depends on what you pay for electricity versus gas or propane, and those rates move too much to print here. What doesn’t move is the physics: a heat pump multiplies the electricity you put in, a furnace burns fuel directly. I’ll run that comparison with your real numbers.

Will a heat pump keep my house warm in an Oklahoma ice storm?

As long as the power is on and the outdoor unit can turn, yes, and on the coldest nights the backup heat carries most of the load. Steam and frost on the outdoor coil during defrost is normal. If ice stops the fan, do not chip at it, turn the system off and call 405-375-4822. A gas furnace also needs electricity to run its igniter and blower.

Why does my heat pump blow cooler air than my old furnace?

A heat pump delivers warm air at a lower temperature than a gas furnace does, and it runs longer to make up for it. It feels cooler at the register even when it is heating correctly. If the house is not reaching the thermostat setting, that is a service call.

Is there a rebate for a heat pump around Kingfisher?

Cimarron Electric Cooperative lists $500 for an air source heat pump in its 2026 program, dual fuel included. Programs change, so tell me your electric utility and ZIP code and I will check the current official program. You apply for the rebate, and I help with the paperwork.

Not sure which one fits your house? Call 405-375-4822 and I’ll walk through your fuel, your ductwork and your budget before you spend a dollar. Or book a free estimate at hartzellsheatair.com.