couple looking at their gas and electric utility bill

How To Lower Gas Bill: 5 HVAC Tricks That Work

Simple changes around your home can significantly lower your gas bill. Keeping furniture and vents clear, regularly cleaning vent openings, and changing your furnace filter improve airflow and efficiency, and reduce strain and wasted energy. Smart thermostat adjustments can deliver meaningful savings without sacrificing comfort. Annual furnace maintenance is one of the most impactful steps, as it keeps burners clean, components running efficiently, and small issues from turning into costly repairs. For homeowners with furnaces older than 15 years, upgrading to a modern high-efficiency system may offer the biggest long-term savings, since newer units convert far more fuel into usable heat and eliminate the energy loss that steadily drives up utility bills.

Simple Ways To Lower Gas Bill

1. Boost Efficiency By Rearranging Your Furniture

Believe it or not, your couch could be costing you $20-30 extra every month. An oversized sectional pushed against the wall register can trap heat behind it while the rest of your living room stays chilly. A bookshelf blocking the floor vent forces your furnace to run overtime just to reach its target temperature.

The Quick Fix: Walk through each room and investigate. Is furniture blocking vents or pressed against exterior walls where air circulates? Even moving a couch 6 inches away from the wall can improve airflow dramatically. Position chairs and sofas to direct warm air into the room, not trap it in dead zones. This 15-minute furniture shuffle could drop your heating costs by 5-10% without spending a dime.

2. Reduce Energy By Cleaning Your Vents

Once your vents are clear, pull off one of the covers. If you find dust, pet hair, and other mysterious debris, it’s time for a thorough cleaning. That fuzzy buildup isn’t just gross, it could be increasing your gas bill. Debris creates resistance and blocks airflow, forcing your furnace to work harder and burn more gas to push warm air through.

The Quick Fix: Set aside 30 minutes to clean out your vents. Turn off your heat, remove the vent covers, and use a vacuum with a long attachment to clean inside the openings. Wipe down the covers, and snap everything back into place. This reduces dust buildup, enhances airflow, and boosts your furnace’s efficiency. Homeowners who do this regularly report noticeable drops in their monthly bills, some saving $15-25 per month just from this simple task. A little effort now can save energy and extend the life of your heating system.

3. Improve Airflow By Changing Your Filter

A dirty filter can increase your heating costs by 15% or more. When your filter is clogged, it was to work exponentially harder and use more gas to suck air through. Additionally, you’re probably breathing in some of that gunk trapped in your filter. It’s like asking someone to drink a milkshake through a coffee straw instead of a regular straw: exhausting and inefficient. A clogged filter forces your furnace to work harder to heat your home, using more gas and increasing your utility bills. A good rule of thumb is a month of use for every inch of depth of your filter. An Aprilaire Media Air cleaner, however, can go a full year between changes.

Filter Depth	Frequency
1″	Change monthly
2″	Change every 2 months
4″	Change every 4 months

Don’t be fooled: Some filters sold at home improvement stores advertise their 1″ filters can go 3 months between changes. While they do filter air for 3 months, the strain from those additional 2 months is not worth it.

The Quick Fix: Set reminders according to your filter changing schedule. Stock up now on the filters you need. Spending $15-30 now on a filter can save you $200+ annually in reduced gas consumption, and extend the life of your furnace for years to come.

4. Adjust Thermostat To Lower Gas Bill

Smart thermostat management can help cut furnace usage when it’s not needed. The U.S. Department of Energy suggests that simply lowering your thermostat by 7 to 10 degrees while you sleep can save you up to 10% on your annual energy bill. For most homeowners, that’s $100-150 back in your pocket every year. With a programmable thermostat, it’s effortless to schedule, and this small adjustment in temperature can go a long way

The Quick Fix: Invest in a programmable or smart thermostat. Program it to automatically drop to 60-63°F when you go to bed, then warm back up to 68-70°F about 30 minutes before your alarm goes off. You’ll wake up to a cozy house without lifting a finger or sacrificing comfort. Additionally, you can program this same temperature drop when everyone leaves for work or school. If you don’t have a programmable thermostat, you can make this simple switch manually. These simple schedules can compound your savings. Some families report cutting their gas bills by 20-25% with strategic thermostat programming alone. However, be careful to not adjust your temperature more than 5-7 degrees frequently. Significant jumps in temperature can add additional strain on your system and can be difficult for it to keep up, especially in freezing temperatures.

5. Invest In Furnace Maintenance

Regular tune-ups are crucial for your furnace to function at maximum efficiency. Think of your furnace like a car. You wouldn’t skip oil changes and expect it to run smoothly. Yet, most homeowners completely ignore their heating system until it breaks down. Here’s what happens when you skip annual maintenance:

Burner Buildup: When burners aren’t cleaned regularly, dust and buildup interfere with proper combustion. This reduces heat output, causes uneven heating, and forces your furnace to run longer to reach the same temperature.
Overworked Blower Motor: A dirty system creates extra resistance, making the blower motor work harder than designed. Over time, this added strain accelerates wear and tear, increasing the risk of breakdowns and shortening the lifespan of the motor.
Minor Problems Go Unnoticed: Small issues like loose electrical connections, dirty sensors, or early component wear often go unnoticed without annual inspections. Left unaddressed, these minor problems can snowball into costly repairs, or even premature system failure.
Dirty Furnaces Use More Gas: An unmaintained furnace operates far less efficiently, burning significantly more fuel just to maintain your set temperature. That inefficiency shows up directly on your energy bills, using 10-30% more gas.

The Quick Fix: Schedule an annual tune-up every fall before heating season kicks in. During this visit, a skilled technician will clean critical components, check for gas leaks, test safety controls, optimize airflow, and catch small problems before they become expensive emergencies. Homeowners who invest in annual maintenance typically see:

15-20% improvement in efficiency (lower bills!)
Fewer unexpected breakdowns in winter
Extended furnace lifespan (think 15-20 years instead of 10-12)
Peace of mind knowing everything’s running safely

HVAC technician preforming maintenance on a furnace. Testing pressure using a manometer.

When To Consider Furnace Replacement To Lower Your Gas Bill

If your heating system is 15+ years old, it may be a better long-term investment to lower your gas bill. Older furnaces operate at 65-75% efficiency at best, meaning 25-35 cents of every dollar you spend on gas literally goes up the chimney. It’s like filling your car’s gas tank and watching a quarter of it leak onto the driveway.

AFUE is an important factor when deciding to repair vs replace furnace

Today’s high-efficiency furnaces achieve 95-97% AFUE ratings. To put this in simple terms, let’s say you spend $1000 on heating. With an 80% AFUE furnace, 20% of all energy used is lost. Alternatively, the most efficient 97% models only lose 3%.

Not sure if it’s time to replace? Watch for these red flags:

Your furnace is 15+ years old
Repairs are getting frequent and expensive
Some rooms are hot while others stay cold
Your gas bills keep climbing year after year
Strange noises, smells, or yellow pilot light flames

Lower Your Gas Bill in Holland, MI

Your furnace should work for you, not against your budget. If you’re tired of watching your hard-earned money disappear into sky-high gas bills, it’s time to take action. At Baumann & DeGroot, we offer free, no-pressure in-home estimates that take just 10 minutes. We’ll evaluate your current system and explain your options without confusing jargon or pushy sales tactics. You’ll get a detailed quote with multiple options that fit your needs and budget for you to decide what makes sense for your family.

Whether you need a professional tune-up, repairs, or want to explore upgrading to a money-saving high-efficiency system, the team at Baumann & DeGroot Heating & Cooling is here to help. We’ve been keeping Michigan homes comfortable and affordable since 1994, and we’d love to do the same for yours.

Your warmer, more affordable home is just one call away. If your furnace isn’t performing as it should or you’re thinking about upgrading to a more energy-efficient system, call Baumann & DeGroot a call at (616) 396-4328 or schedule online.

How To Lower Gas Bill FAQs

How much can I save by lowering my thermostat at night?

According to the U.S. Department of Energy, lowering your thermostat by 7 to 10 degrees while you sleep can save you up to 10% on your annual energy bill.

How often should I change my furnace filter to lower my gas bill?

A good rule of thumb is to change your furnace filter every 1-3 months during heating season. Clogged filters can cause your furnace to work overtime, increasing your heating costs by 15% or more .

Can furniture placement really effect my gas bill?

Yes, large furniture pieces placed in front of vents can block warm air circulation, trapping heat and causing longer run cycles to reach the target temperature.

What’s the difference between old and high-efficient furnaces?

Older furnaces (15+ years) typically run at just 65-75% efficiency, meaning 25-35% of the gas you pay for goes to waste. Modern high-efficiency furnaces achieve 95-97% efficiency, wasting only 3-5% of fuel.

Does annual furnace maintenance really lower gas bills?

Yes, cleaned and calibrated furnace components prevent the system from working harder or overheating, redicing fuel usage.

How do I know if my furnace needs replacing?

Warning flags to look for include frequent and expensive repairs, unbalanced heating, rising gas bills, strange noises, smells, or yellow pilot light flames. For peace of mind, it’s always a good idea to get a professional opinion.