--- title: "10 Home Heating Mistakes That Spike Your Utility Bills" description: "Looking for ways to lower your energy costs? Fiddling with vents and thermostats may end up costing you more in the long run." date: "2024-02-27" modified: "2026-10-19" authors: - name: "Jennifer Noonan" job_title: "Contributing Writer" link: "https://www.bobvila.com/authors/jennifer-noonan.md" url: "https://www.bobvila.com/articles/home-heating-mistakes/" categories: - "Heating" - "Heating & Cooling" - "Interior" tags: - "Energy" - "heating" - "News" --- # 10 Home Heating Mistakes That Spike Your Utility Bills ![Worried mature man wearing a beanie cap reading heating bill.]() *Photo: Jelena via Adobe Stock* Despite our best efforts to economize and lead more eco-friendly lives, few of us are are paying less for our utilities than we were a few years ago. According to an October 2026 report by the [U.S. Energy Information Administration](), households that use electricity will pay about 4 percent more than they did last year; households with oil will pay about 21 percent more this winter. Most of us are willing to try new cost-saving measures to get our utility spending out of the stratosphere, but these ill-advised actions will only cost you more in the long run. ## 1. Heating an Empty House ![Beautiful living room interior with hardwood floors and fireplace in new luxury home.]() *Photo: iStock* If you’re away from home for most of the day, or if you travel on the weekends, don’t leave the house on the same temperature settings you would if you were home all day. Purchasing a [programmable thermostat]() can save you money on energy bills. Set the temperature to go down while you’re away, and warm up the house right before you return. ## 2. Not Locking Your Windows ![Woman securing the lock on a home's window.]() *Photo: iStock* Of course you keep your windows closed in the winter, but do you remember to lock them? If your windows are not sealed tightly, cold air can seep into your home, and the warm air your furnace is producing could leak out. Be sure to lock all your windows during the winter months. ## 3. Cranking Up the Thermostat ![Person setting a digital thermostat to 78 degrees Fahrenheit.]() *Photo: iStock* Don’t make the mistake of trying to heat your home faster by cranking up the thermostat higher than it should go. Turning your thermostat too high has no effect on how quickly your home will warm up. Your furnace will just end up running longer, which just means a [higher electric bill]() for you. ## 4. Not Changing the Air Filter ![Woman holds a dirty furnace filter and shines a flashlight up from the bottom.]() *Photo: Tom Fenenga for BobVila.com* When the air filter is dirty, your furnace has to work—and will use more energy doing so. Make sure you [change the furnace air filter]() on a regular schedule. Your system will work more efficiently, and more economically. If you're in the market for replacement filters, be sure to check out our [tested guide to the the best furnace filters](). ## 5. Ignoring Leaks and Drafts ![Young man wearing overalls sealing cracks between window and trim using waterproof silicone caulk on the balcony.]() *Photo: LithiumPhoto via Adobe Stock* Don’t underestimate how much heat your home could be losing as a result of air that leaks from doors, and [drafty windows](). Check all the doors, windows, and exterior walls for drafts. Seal and caulk any areas where cold air is coming in and warm air could leak out. Pay special attention to the basement and attic—they are generally the draftiest spots. ## 6. Closing Vents in Unused Rooms ![Two hands on a closed air vent outflow to reduce air circulation and flow out of a home furnace air duct. Adult male has two hands on closed home furnace white rectangle wall air vent duct on a wall]() *Photo: Lee Serenethos via Adobe Stock* You might think it would make sense to [close the vents in unoccupied rooms]() to save money on your utility bill. After all, why heat a room that’s empty? The fact is, the ductwork for your heating system is sized to provide even heating throughout the house, and the system won’t work efficiently if you disrupt that balance by closing vents. ## 7. Neglecting Regular Furnace Maintenance ![A repairman working inside a home, repairing a furnace.]() *Photo: iStock* Just like your car, your furnace needs regular maintenance to keep it in good working order. Don’t put off this task: A well-maintained [HVAC system]() will run more efficiently, and keep your energy bills down. Also, regular checkups will ensure that a minor [furnace maintenance]() issue doesn’t balloon into a costly maintenance problem. ## 8. Turning the Thermostat Down Too Low ![Woman in her 40s with glasses adjusting her home's central heating thermostat. She is wearing a blanket around her shoulders.]() *Photo: iStock* While you don’t want to heat your house when you’re not home, don’t make the mistake of turning the thermostat down too low while you’re out. Doing this will just force your furnace to work harder when it's time to bring the [thermostat to the right temperature]() again, and you'll end up spending more money in the long run. ## 9. Using Your Fireplace as a Heat Source ![Father with son and dog sitting in comfortable armchairs in their cozy country house near fireplace.]() *Photo: iStock* It might seem like a good idea to turn your thermostat down and [use a fireplace]() to heat your living area, but you'd be doing more harm than good. Most of the warm air will go straight through the chimney and out of your house. That very same chimney will also let in the chilly air from outside, making your house colder and forcing your furnace to work harder. ## 10. Leaving Exhaust Fans On ![Bathroom exhaust fan near shower rod in a modern grey bathroom.]() *Photo: iStock* As soon as you’ve finished using a kitchen or [bathroom fan]() that vents exhaust outside, turn it off. Exhaust fans are necessary to purge moist or odiferous air from your home, but you definitely don’t want to be sending warm air out of your house longer than is necessary. ## Author A confessed DIY junkie, Jennifer Noonan writes about home improvement, gardening, and all things do-it-yourself. The recipient of degrees in International Relations and Library & Information Science from Syracuse University, Noonan has worked in media and related fields for over 15 years, including her time at [MTV Networks](), where she served as Manager of Digital Programming at [Nickelodeon](). Today, Noonan lives in Delaware with her husband and daughters, where she is ardently teaching the next generation how to use power tools. ### Author social links [LinkedIn]() ## More - [20 Ways to Keep Warm Without Turning on the Heat]() - [10 Mistakes You’re Making With Your Air Conditioner That Are Spiking Your Energy Bills]() - [Why Is My Electric Bill So High?]() - [The 25 Smartest and Smallest DIYs You Can Do for Your Home]() - [Some U.S. Homeowners Will Pay 31% More in Heating This Winter—Here’s How to Start Saving Now]() - [This Common Home Heating Hack Wastes More Energy and Money Than it Saves]() - [How to Be Less Dependent on the Grid and Lower Energy Bills]() - [16 Things in and Around Your Home That Are Quietly Wasting Energy]()