Are Heat Pumps Worth It in Southern Illinois? What Edwardsville Homeowners Should Know

Your neighbor recently installed a heat pump and cannot stop talking about the comfort and energy savings. Your brother-in-law insists heat pumps struggle once temperatures drop below freezing. Meanwhile, the installation quote on your kitchen counter leaves you weighing two very different options.

So, are heat pumps worth it in Southern Illinois? For many Edwardsville homeowners, they can be, but the answer depends on more than outdoor temperatures or the equipment price. What matters most is what the heat pump will replace, whether your home needs supplemental heating during colder weather, and how local electricity and fuel costs compare.

In this guide, we will explain how heat pumps perform through Southern Illinois winters, compare their operating costs with existing heating systems, and examine the installation factors that determine whether upgrading makes financial sense for your Edwardsville home.

Key Takeaways

• Heat pumps move heat instead of creating it, so they can deliver up to three times more heat energy than the electricity they use, according to the U.S. Department of Energy.
• In Edwardsville’s mixed climate, a modern heat pump carries most of the heating season on its own and covers all of your cooling.
• A heat pump is clearly worth it if it replaces electric baseboard, an electric furnace, or an aging central air conditioner, and usually worth it if it replaces propane.
• If you heat with natural gas, a heat pump rarely beats a high-efficiency gas furnace on winter bills alone, which is why many Metro East homes choose a dual fuel system.
• The federal heat pump tax credit ended on December 31, 2025, and Illinois’s federally funded HEAR rebates had not launched as of mid-2026, so Ameren Illinois instant discounts are the main incentive right now.
• Installation quality matters more than the brand name; poor sizing and low airflow are the most common reasons heat pumps disappoint.

The Short Answer Depends on What a Heat Pump Would Replace

A heat pump is not a single verdict. It depends on what is heating your home today.

Think of it this way. Every heating system turns some purchased energy into warmth. A heat pump uses electricity to pull existing heat out of the outdoor air and move it inside. Because it moves heat rather than making it, it can deliver two to three units of heat for every unit of electricity it consumes.

That makes it a huge upgrade over anything that turns electricity directly into heat, a strong competitor against propane, and a closer call against cheap natural gas.

Here is how that plays out for the four situations we see most often in the Edwardsville area:

• Electric resistance heat (baseboard, electric furnace, wall heaters): A heat pump typically cuts heating energy use by more than half. This is the easiest yes in the region.
• Propane furnace: Common on rural properties outside city gas lines. Running costs come out roughly even to clearly favorable for the heat pump, depending on propane prices that winter.
• Natural gas furnace: A heat pump usually costs more to run in the coldest months, but can win in spring and fall.
• Old central air conditioner, any heating fuel: If your AC is near the end of its life anyway, a heat pump costs only modestly more and adds an efficient heat source for the shoulder seasons.

How a Heat Pump Handles an Edwardsville Winter

The biggest myth about heat pumps in Southern Illinois is that they stop working in the cold. Older units from the 1990s earned that reputation. Modern equipment does not deserve it.

Edwardsville sits in Climate Zone 4A under the International Energy Conservation Code, a mixed-humid climate. Winters bring real cold snaps, but most heating hours fall between the upper 20s and the 40s. That is exactly the range where heat pumps work most efficiently.

As outdoor temperatures fall, a heat pump has less heat to collect, so both its output and its efficiency drop. Every home reaches a “balance point,” the outdoor temperature where the heat pump alone can no longer keep up with the heat the house is losing. Below that point, supplemental heat makes up the difference.

What that looks like in practice:

• Standard heat pumps in a reasonably insulated Edwardsville home often carry the full load down to the mid-20s or lower.
• Cold-climate heat pumps with variable-speed compressors keep producing meaningful heat well into single digits.
• Backup heat from electric strips or a gas furnace covers the rare stretches when temperatures drop further.

You will also notice defrost cycles. When frost builds on the outdoor coil, the system briefly reverses to melt it, and you may see steam rise from the unit. That is normal. The Department of Energy recommends choosing a unit with demand-defrost controls, which defrost only when needed rather than on a timer, and suggests shielding the outdoor unit from prevailing winter wind.

What It Actually Costs to Run a Heat Pump in Southern Illinois

Operating cost drives most decisions, so here is the math in plain terms.

All figures below use the same illustration: a home that needs 50 million Btu of delivered heat over a winter. Electricity is priced at the Illinois residential average of 18.24 cents per kWh reported in EIA data for May 2025 through April 2026, and natural gas at the 2025 EIA Illinois residential average of $11.25 per thousand cubic feet.

For propane, EIA’s weekly survey shows Illinois residential propane prices climbing from about $1.73 per gallon in October 2025 to a peak near $2.20 in February 2026. We used $2.00 per gallon.

Estimated cost to heat that home for one season:

• Electric resistance (baseboard or electric furnace): about $2,670
• Propane furnace, 95% efficient: about $1,150
• Heat pump, average seasonal efficiency of 2.5: about $1,070
• Natural gas furnace, 95% efficient: about $570

Three conclusions jump out.

First, a heat pump costs roughly 60% less to run than electric resistance heat. That savings repeats every winter, which is why replacing baseboard or an electric furnace is such a strong case.

Second, the heat pump and a high-efficiency propane furnace land close together at $2.00 per gallon of propane. When propane spikes, as it did in February 2026, the heat pump pulls ahead. When propane is cheap, it is close to a tie. Against an older 80% propane furnace, the heat pump wins clearly.

Third, natural gas is still the cheapest fuel per unit of heat in Illinois. A heat pump alone will not beat a 95% gas furnace on winter bills.

These are illustrations, not quotes. Your Ameren Illinois supply rate, your home’s insulation, how well your ducts are sealed and how efficient the specific heat pump is will all move these numbers.

The Summer Half of the Equation

Southern Illinois homeowners often judge heat pumps only on winter performance. That leaves out half the year.

A heat pump is also a central air conditioner. In summer, it works exactly like one, pulling heat out of your home and releasing it outdoors. A modern heat pump cools as efficiently as a comparable new AC unit.

That matters here because Metro East summers are long, hot and humid. The area once hit 114°F in July 2012, and stretches of 90 degree days with heavy humidity are routine.

So if your air conditioner is 12 to 15 years old and due for replacement, the real comparison is not heat pump versus furnace. It is a new AC versus a new heat pump. The price gap between those two is usually modest, and the heat pump gives you an efficient second heat source in return.

Where Heat Pumps Are Clearly Worth It in Southern Illinois

Based on the cost math and the climate, a heat pump is a strong investment in these situations:

• All-electric homes. Ranch homes and newer builds with electric furnaces or baseboard heat see the largest savings.
• Rural properties on propane. Homes outside natural gas service areas in Madison County avoid propane price swings and tank rental fees.
• AC replacement time. If the cooling side needs replacing anyway, upgrading to a heat pump adds heating value for a modest premium.
• Additions, finished basements and garages. Rooms that were never tied into the main system can be heated and cooled without extending ductwork.
• Homeowners who want to cut combustion appliances. A heat pump eliminates burning fuel inside the home for heating.

Where a Heat Pump Is a Harder Sell

A heat pump is not the right call for every home. Be cautious in these cases:

• You have a newer, high-efficiency gas furnace and a working AC. Replacing equipment with years of life left rarely pays off.
• The home is drafty or poorly insulated. High heat loss pushes the balance point up and forces more backup heat. Air sealing and insulation should come first.
• The ductwork is undersized or leaky. Heat pumps deliver air at lower temperatures than gas furnaces and need correct airflow to work well.
• The electrical panel is at capacity. Some older homes need a panel or service upgrade first, which adds cost.

None of these rule a heat pump out permanently. They just change the order of the work.

Dual Fuel: The Middle Ground Many Metro East Homes Choose

For Edwardsville homes that already have natural gas, the most practical answer is often not one system or the other. It is both.

A dual fuel system pairs an electric heat pump with a gas furnace. The heat pump handles heating through fall, spring and milder winter days, when it is most efficient. When temperatures drop to a set switchover point, the thermostat shuts off the heat pump and lets the gas furnace take over.

This setup gives you three advantages:

• The heat pump covers most heating hours at high efficiency.
• The furnace delivers warm, steady heat on the coldest nights at the lowest fuel cost.
• You always have a second heat source if one system needs service in January.

You can tune the switchover temperature to your actual utility rates. If electricity prices rise, it moves up. If gas prices climb, it moves down. That flexibility is valuable when nobody knows what energy will cost in five years.

Ductless Heat Pumps for Older Homes and Additions

Not every Edwardsville home has ductwork that suits a central heat pump. Homes in the Leclaire Historic District and the older neighborhoods near downtown often have boilers, limited duct runs or rooms that were added on long after the original system went in.

Ductless mini-split heat pumps solve that problem. An outdoor unit connects to one or more indoor heads through a small line set. The Department of Energy notes in its guide to air-source heat pumps that ductless systems need only about a three-inch hole through the wall, which makes them a practical fit for additions and homes without ducts.

Each indoor head runs as its own zone, so you heat and cool only the rooms you are using. For a sunroom, a converted attic or a garage workshop, our ductless mini-split service in Edwardsville is often the simplest way to add efficient year-round comfort without opening walls for new ducts.

Incentives and Local Rules for Heat Pumps in Edwardsville in 2026

The incentive picture changed this year, and much of the online advice is now out of date.

Federal tax credit. The federal Energy Efficient Home Improvement Credit (25C), which offered up to $2,000 for a qualifying heat pump, ended for equipment installed after December 31, 2025. No federal tax credit applies to heat pumps installed in 2026.

Federal HEAR rebates. The Inflation Reduction Act’s Home Electrification and Appliance Rebates program allows up to $8,000 for a heat pump for qualifying lower-income households. As of mid-2026, Illinois had not yet launched its HEAR program, so these rebates are not currently available.

Ameren Illinois instant discounts. Ameren Illinois offers instant discounts on qualifying ENERGY STAR ducted and ductless air-source heat pumps through participating contractors. The discount is applied at the time of installation rather than through a mail-in rebate. Amounts and qualifying efficiency levels change by program year, so confirm the current offer with your installer before you commit.

Electric co-op members. Some rural homes around Edwardsville get electricity from Southwestern Electric Cooperative rather than Ameren Illinois. If that is your provider, check with the co-op directly, since Ameren incentives will not apply.

Refrigerant rules. New heat pumps are shifting to lower-impact A2L refrigerants such as R-454B and R-32. In May 2026, the EPA lifted the January 1, 2026 installation deadline for older R-410A equipment made before 2025, so you may still see both types quoted. Ask which refrigerant your system uses, since that affects future service.

Permits and historic districts. The City of Edwardsville enforces the 2021 International Mechanical Code, the 2021 International Residential Code and the 2020 National Electrical Code, and it requires permits for electrical upgrades. If a heat pump requires a panel or service upgrade, that work needs a permit. Homes in the Leclaire, St. Louis Street and Downtown historic districts may also need a Certificate of Appropriateness for visible exterior changes, which can include outdoor unit placement. Contact Edwardsville Public Works at (618) 692-7535 to confirm requirements.

What Separates a Good Heat Pump Installation From a Bad One

When a heat pump disappoints in Southern Illinois, the equipment is rarely the problem. The installation usually is.

These are the details that decide whether your system performs the way the cost estimates promise:

• A real load calculation. Sizing should come from a room-by-room heat loss calculation, not from the size of the old unit. An oversized heat pump short cycles and dehumidifies poorly in summer. An undersized one leans on backup heat in winter.
• Correct airflow. The Department of Energy recommends about 400 to 500 cubic feet per minute of airflow per ton of capacity. Performance drops sharply when airflow falls much below 350.
• Accurate refrigerant charge. Split systems are charged on site. Too much or too little refrigerant both reduce efficiency.
• Smart backup heat controls. Set thermostats so electric strips or a gas furnace engage only when the heat pump truly cannot keep up.
• Thoughtful outdoor unit placement. The unit needs clearance, good drainage for defrost water and protection from drifting snow and direct winter wind.

Ask any contractor you are considering how they handle each of these. The answers will tell you a lot about the quality of the work.

Deciding Whether a Heat Pump Is Worth It for Your Edwardsville Home

So, are heat pumps worth it in Southern Illinois? The climate is not the obstacle many people assume. Modern heat pumps handle Edwardsville winters well and cover every cooling day of summer.

The real deciding factor is where you’re starting. If you are replacing electric heat, propane or a worn-out air conditioner, a heat pump is very likely worth it. If you have natural gas, a dual fuel system usually captures the efficiency of a heat pump without giving up the low winter cost of gas.

The right answer for your house comes from a few measurements: your heat loss, your duct capacity, your electrical service and your actual utility rates. B & W Heating & Cooling has served Edwardsville and the Metro East since 1949, and our heat pump installation team in Edwardsville can run those numbers for your home and show you side by side what a heat pump, a dual fuel system or a straight replacement would cost to install and operate. Call B & W Heating & Cooling at (618) 867-4445 to set up an in-home evaluation.

FAQ

Do heat pumps work in Southern Illinois winters?

Yes. Modern heat pumps operate efficiently through most Edwardsville winter weather, and cold-climate models keep producing heat into single-digit temperatures. A backup heat source covers the coldest stretches.

Is a heat pump cheaper than propane in Illinois?

Often, yes. At about $2.00 per gallon propane, a heat pump and a 95% efficient propane furnace cost roughly the same to run. When propane prices rise or the furnace is an older 80% model, the heat pump is usually cheaper.

Are there heat pump rebates in Edwardsville in 2026?

Ameren Illinois offers instant discounts on qualifying ENERGY STAR air-source heat pumps through participating contractors. The federal 25C tax credit ended December 31, 2025, and Illinois’s HEAR rebates had not launched as of mid-2026.

Should I replace my gas furnace with a heat pump?

If your gas furnace is newer and working well, usually not. If it is aging and your air conditioner also needs replacement, a dual fuel system pairing a heat pump with a high-efficiency gas furnace is often the best value.

Do I need a permit to install a heat pump in Edwardsville?

Installations must meet the codes enforced by Edwardsville Public Works, and any electrical upgrade needed for the heat pump requires a permit. Homes in the city’s historic districts may also need a Certificate of Appropriateness for exterior changes.