Heat pump vs furnace is the question most homeowners face when an old system is near the end of its life. A furnace burns fuel to make heat. A heat pump moves heat that is already in the outdoor air into your house, and it cools in summer too.
Neither one is the right answer everywhere. Your winters, what you pay for gas and electricity, the ducts you already have and how long you plan to stay all change the answer. This guide walks through each of those so you can walk into a quote knowing what to ask.
Check this first: what do you already have?
Go outside and find the metal nameplate on the outdoor unit. It usually sits on the side or back panel. It names the unit as an air conditioner or a heat pump, often next to the model number. Many people have owned a heat pump for years and never knew it. Another clue: if that outdoor unit runs in winter while the house is heating, it is a heat pump. Take a photo of the nameplate. Any pro you book will want to see it.
Heat Pump vs Furnace: How Each One Makes Heat
The two systems heat your home in very different ways. That difference explains almost everything else in this guide.
A furnace makes heat
Most furnaces burn natural gas or propane. Some use electric heating coils, and some older homes burn oil. A blower pushes air across the hot metal and out through your ducts. The air coming out of the vents feels hot. A furnace only heats. You need a separate air conditioner for summer.
A heat pump moves heat
A heat pump works like an air conditioner running in reverse. Even cold outdoor air holds some heat. The heat pump pulls that heat out and carries it inside. Because it moves heat instead of making it, it can deliver more heat than the electricity it uses. In summer it flips direction and cools the house like a normal air conditioner.
One thing surprises people. Air from a heat pump feels warm but not hot. It runs longer and steadier than a furnace, which gives off short blasts of very hot air. Both can keep a house comfortable. They just feel different at the vent.
How Cold Weather Changes the Heat Pump vs Furnace Answer
This is where most of the old advice comes from. As it gets colder outside, there is less heat in the air to move. A heat pump keeps working well below freezing, but it delivers less heat and uses more power to do it. A gas furnace puts out the same heat at 40 degrees or at zero.
Backup heat
Most heat pump systems have a backup, often electric heating coils inside the indoor unit. It kicks in on the coldest hours or when you raise the thermostat a lot at once. If your thermostat shows AUX or EM HEAT, you have a heat pump with backup heat. Backup electric heat is expensive to run, so you want it to come on rarely.
Cold climate heat pumps
Newer cold climate models are built to keep heating on much colder days than older heat pumps could. ENERGY STAR has a cold climate label for them. If you live where winters are long and hard, ask every pro whether the model they quote carries that label and how much heat it puts out at your coldest normal temperature.
Dual fuel
A dual fuel system pairs a heat pump with a gas furnace. The heat pump handles mild and chilly days. When it drops below a temperature the installer sets, the furnace takes over. If you already have gas and ducts, this is often the middle path between the two.
On cold mornings you may see the outdoor unit steam or hear it stop and start. That is a defrost cycle clearing frost off the coil. It is normal.
Which One Makes Sense Where You Live
Here is a plain starting point by climate. A pro who looks at your actual house should have the final word.
Hot or mild winters (Arizona, Texas, Florida, Nevada)
A heat pump is usually the easy pick. Winters rarely push it hard, and you need strong cooling for most of the year anyway. One system does both jobs. Many homes in these states already have one.
Cold winters (Ohio, Colorado and the northern states)
Here the choice is real. A gas furnace is the familiar choice and handles deep cold without trouble. A cold climate heat pump can carry a home through winter too, but sizing and backup heat matter more. Dual fuel is common here because it uses each system where it works best.
No gas line at the house
If you heat with electric baseboards, propane or oil today, a heat pump often looks better. Ask for a comparison against what you pay now, not against natural gas you do not have.
How to Choose: Four Questions to Answer Before You Get Quotes
1. What do gas and electricity cost you?
Pull up one winter gas bill and one winter electric bill. Look for the price per therm of gas and the price per kilowatt hour of electricity. Hand both to the pro and ask them to compare running costs for your house. Cheap gas and pricey power favors a furnace. Pricey gas or propane and cheaper power favors a heat pump.
2. What ductwork do you already have?
If you have ducts in decent shape, both systems can use them. If you have no ducts, say with a boiler and radiators, a ductless heat pump (often called a mini split) may be simpler than adding ducts. Leaky ducts waste heat with either system, so ask the pro to look at them during the visit.
3. Does your air conditioner need replacing too?
If your AC and furnace are about the same age, this is the best time to compare. A heat pump replaces the AC and covers most or all of your heating. If only the furnace is failing and the AC is newer, a new furnace may be the simpler fix for now.
4. How long will you stay?
If you plan to move in a couple of years, the lowest upfront price may matter most. If you plan to stay ten years or more, running costs add up and deserve more weight than the sticker price.
Two more things can change the math. A heat pump draws more electricity, so the pro should check whether your electrical panel has room for it. If it does not, you may need a pro from our electrical services page to look at the panel. And a drafty house makes any system work harder. Before you size a new system, it can be worth a look from our insulation services page.
What to Ask the Pro Who Quotes Your Job
A good quote answers these without you having to push:
· Did you size the system for my house, or just match the old one?
· If you quoted a heat pump, how much heat does it put out on our coldest normal day?
· When will backup heat or the furnace kick in, and what does that cost to run?
· Will my ducts, thermostat and electrical panel work with this, or do they need changes?
· Are there utility rebates or tax credits for this model, and will you help with the paperwork?
· Can I see your license and proof of insurance?
Rebates and credits change often and differ by state and utility. Check with your utility and confirm the details yourself before you count on them.
If your old furnace is still running and you are trying to decide whether to fix it or replace it, our guide to HVAC repair and replacement costs in Ohio walks through the repair or replace decision.
Heat Pump vs Furnace: Common Questions
Is a heat pump or a furnace cheaper to run?
It depends on what electricity and gas cost where you live and how cold your winters get. A heat pump moves heat instead of making it, so it can deliver more heat than the electricity it uses. A gas furnace often wins in very cold places with cheap gas. Ask the pro to compare both using your own utility rates, not a national average.
Do heat pumps work when it is below freezing?
Yes. A heat pump keeps pulling heat out of outdoor air well below freezing. Output and efficiency drop as it gets colder. Cold climate models are built to keep heating on much colder days, and most systems also have backup heat for the coldest hours.
What is a dual fuel system?
A dual fuel system pairs a heat pump with a gas furnace. The heat pump handles mild and cool days. When it gets colder than a set point the installer picks, the furnace takes over. It is a common choice for homes that already have gas and ductwork.
Can I add a heat pump if I already have a furnace?
Often yes. If your air conditioner is near the end of its life, it can be replaced with a heat pump that uses the same ducts and works alongside the furnace you have. A pro needs to check that the furnace, ducts and thermostat can work with it.
Why does air from a heat pump feel cooler than furnace air?
A heat pump sends out air that is warm but not as hot as the air from a gas furnace. It runs longer and steadier to heat the house. The air can feel cool on your hand at the vent even while the house is being heated properly.
How do I know if I already have a heat pump?
Read the metal nameplate on the outdoor unit. It names the unit as an air conditioner or a heat pump. Another clue: if the outdoor unit runs in winter while the house is heating, it is a heat pump. An air conditioner sits still all winter.
Find a Heating and Cooling Pro Near You
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