Key Takeaways
- Turn the thermostat back 7 to 10°F for 8 hours a day. The U.S. Department of Energy puts the savings at up to 10% a year on heating and cooling.
- Seal air leaks and insulate the attic. ENERGY STAR estimates an average of 15% off heating and cooling costs.
- Check your gas price. Since April 1, 2026, Duke Energy Ohio’s default gas price changes every month with the market. You can compare it to fixed offers on the state’s Energy Choice Ohio site.
- Use the help that’s available: Duke’s Budget Billing and Ohio’s HEAP and Winter Crisis Program if you qualify.
The fastest ways to lower your Duke Energy heating bill in Cincinnati are to turn the thermostat back while you sleep or are away, replace a dirty furnace filter, and seal the air leaks in your attic and basement. The first costs nothing, the second costs a few dollars, and the third is the biggest long-term saving most homes can make. Beyond that, check what you pay for the gas itself, since Duke Energy Ohio changed how it prices natural gas in 2026, and use the programs Duke and the state offer. Here is what each step is worth, starting with the ones that cost nothing.
Why Cincinnati Heating Bills Peak in January
Heating need is measured in heating degree days: the colder the day, the more it counts. Based on NOAA’s 1991 to 2020 normals for the Cincinnati airport, a typical year has 4,892.3 heating degree days, and January alone accounts for 1,042.8 of them. December adds 911.4 and February 846.9. In other words, those three months are where your heating bill is made. Every step below saves the most if it is done before December.
Free Ways to Cut Your Heating Bill Today
Turn the Thermostat Back at Night and While You’re Out
The U.S. Department of Energy estimates you can save as much as 10% a year on heating and cooling by turning the thermostat back 7 to 10°F for 8 hours a day. A house that sits cooler loses heat more slowly, so the furnace burns less gas overall, even counting the time it takes to warm back up. A setting around 68°F while you are home and 60 to 62°F overnight is a common place to start. A programmable or smart thermostat does it for you.
One exception: if you heat with a heat pump, keep setbacks small, around 2 to 3°F. A big setback can make the heat pump call for its electric backup heat to catch up in the morning, and that costs more than it saves. Our post on heat pumps in Cincinnati winters explains why.
Let the Sun In, Then Close the Curtains
Open south-facing curtains on sunny days and close all of them at dusk. It is free heat in the afternoon and one less cold pane of glass at night.
Keep Vents and Returns Clear
Furniture over a register or a rug over a return grille makes the furnace work harder to move the same air. Clear them, and leave vents open even in rooms you don’t use. Closing vents doesn’t save money on most forced-air systems. It raises the pressure in the ducts and can make the furnace overheat and short cycle.
Turn the Water Heater Down to 120°F
Water heating is often the second-biggest energy use in a home after heating. Some manufacturers set water heaters to 140°F at the factory. The Department of Energy recommends 120°F for most households, which is hot enough for showers and dishes and cuts standby losses.
Low-Cost Fixes That Pay Back in One Winter
Replace the Furnace Filter
A clogged filter forces the blower to work harder and can make the furnace overheat and shut itself down early. Check it monthly through the winter and change it at least every 3 months. Our guide to how often to change your furnace filter covers which kind to buy.
Seal the Obvious Air Leaks
Weatherstrip doors you can see daylight around, caulk gaps around window trim, and put foam gaskets behind outlet covers on outside walls. In the basement, the rim joist, where the house sits on the foundation, is one of the leakiest spots in older Cincinnati homes, and it can be sealed with caulk or spray foam in an afternoon.
Reverse Your Ceiling Fans
Set ceiling fans to spin clockwise on low. It pushes warm air that collects near the ceiling back down without making a draft, which helps most in rooms with high ceilings.
Bigger Upgrades Worth Planning in Cincinnati
Our view is simple: seal and insulate before you spend money on new equipment. ENERGY STAR estimates homeowners save an average of 15% on heating and cooling costs, or 11% on total energy costs, by air sealing and adding insulation in attics, floors over crawl spaces, and basements. That saving applies to whatever furnace you have, and a tighter house can often get by with a smaller, less expensive system when it is time to replace it.
After that, the equipment matters. A yearly furnace tune-up keeps the burner adjusted and the heat exchanger clean. If your furnace is older and in the 80% efficiency range, a 95% or higher model turns more of each dollar of gas into heat. That is a replacement decision, though, not a bill-cutting trick, and it only makes sense when the old furnace is near the end of its 15 to 20 years.
Check What You Pay for Gas in Cincinnati
Your Duke Energy gas bill has two parts: delivery, which Duke always handles, and the gas itself, which you can buy from Duke or from a competing supplier. On April 1, 2026, Duke Energy Ohio replaced its old gas cost recovery charge with a standard service offer. The price is set through an auction overseen by the Public Utilities Commission of Ohio: each month, it is the market price for natural gas futures plus a fixed $4.00 per dekatherm. That means it moves with the market, and winter months are often the most expensive.
If you would rather lock in a price, you can compare Duke’s current rate with fixed-rate offers on the state’s Energy Choice Ohio comparison chart. Read the terms before you sign. Look at the contract length, the early termination fee, and what the price becomes when the contract ends. A low introductory rate that rolls into a high variable one can cost more than staying with Duke.
Help From Duke Energy and the State of Ohio
Budget Billing. Duke averages your bills over 12 months so January doesn’t land all at once. It doesn’t lower what you use, but it takes the spike out of winter.
Smart $aver rebates. Duke’s rebate program for Ohio homes has covered equipment like heat pumps, central air, and smart thermostats. Programs change, so check the current list before you buy.
HEAP and the Winter Crisis Program. Ohio’s Home Energy Assistance Program helps eligible households with heating costs, and the Winter Crisis Program runs from November 1 to March 31 for households facing a disconnection. In Hamilton County, applications go through the Cincinnati-Hamilton County Community Action Agency.
When You Don’t Need a Contractor
Most of this list is yours to do. The thermostat, the filter, the curtains, the fans, the water heater setting, weatherstripping, and shopping for a gas price don’t need us, and together they are where most of the savings are. Call a contractor when the furnace itself is the problem: it short cycles, runs constantly without keeping up, or hasn’t been serviced in years. If your furnace turns on and off every few minutes, our guide to furnace short cycling walks through the causes.
Get Your Furnace Ready for a Cincinnati Winter
Degree of Comfort handles furnace maintenance, repair, and replacement across Cincinnati and the surrounding Tri-State, including Northern Kentucky and Southeast Indiana. A tune-up before December is the one professional step on this list, and it keeps the furnace burning clean through the three months that make up most of your bill. We are family-owned, licensed and insured, with upfront, flat-rate pricing.
Call (513) 586-5107 or request an estimate.
Frequently Asked Questions
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Call (513) 586-5107
