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Revised:
May 30th, 2025
Are your summer energy bills climbing higher every year?
Do you feel like your AC is running nonstop, but your house still isn’t cool?
In this guide, we will share nine proven HVAC-backed strategies that can cut cooling costs without sacrificing comfort—even during Ohio’s muggiest months.
You’ll learn how to optimize your thermostat, seal costly leaks, and use smart technology (and smarter habits) to take control of your AC bills.
With over 30 years of HVAC service experience in Central Ohio, we have seen what works, what doesn’t, and what can quietly cost you thousands if you’re not careful. In this article, we will share nine straightforward, honest tips to help you save energy with your A/C. These are the same tips we give to our neighbors, customers, and our own families.
1. Raise Your Thermostat to Save 3–5% on Cooling Costs
One of the easiest ways to save energy is by raising your thermostat setting by just a few degrees.
The U.S. Department of Energy recommends setting your thermostat to 78°F when you’re home and higher when you’re away. Every degree you raise your thermostat can save you about 3-5% on cooling costs.
Pro Tip: Use a smart thermostat with scheduling features. Many can automatically raise the temp when you’re gone and bring it back down before you return.
Real-World Story:
A family in Westerville called me out last July. They were uncomfortable even with the thermostat set at 70°F. Turns out they were using outdated manual settings. We installed a smart thermostat and coached them on optimal usage, and within a month, they reported $35 saved on their next electric bill. Comfort stayed the same.
2. Replace Your Air Filter Every 1–3 Months
A clogged filter forces your AC to work harder, using more energy to push air through.
Check your filter every month and replace it at least every 60-90 days. If you have pets or allergies, consider changing it more often.
Why it matters: Your filter plays a huge role in both energy efficiency and indoor air quality. A clean filter keeps airflow smooth and helps your unit cool more effectively.
3. Seal Leaky Ducts and Windows to Stop Cool Air from Escaping
Your AC can run perfectly, but if your cooled air escapes through gaps in ductwork or window seals, you're losing money.
Have your ductwork inspected for leaks — especially in basements or attics. Use weather stripping or caulk to seal around doors and windows.
What I often see: Leaky ductwork in older homes that haven’t been touched since the '70s. A little duct sealing can often improve efficiency by 20% or more.
4. Use Ceiling Fans to Feel Cooler at Higher Temps
Fans don't lower the temperature, but they make you feel cooler by moving air across your skin.
Run ceiling fans counterclockwise in the summer to push cool air down.
Key Insight: If you're using fans, you can often raise your thermostat 2-4 degrees without losing comfort. That’s real savings.
5. Optimize or Upgrade to a Smart Thermostat
We touched on this in tip #1, but it deserves its own section.
Smart thermostats like Ecobee, Nest, and Trane Home offer energy reports, learning algorithms, and occupancy detection.
Bonus Tip: Many smart thermostats now use AI to predict your habits and weather patterns. This isn’t just a gimmick. It can trim 10-15% off your annual cooling costs when used correctly.
What I recommend: If you have a variable-speed or high-efficiency system, pairing it with a smart thermostat maximizes the value of both.
6. Schedule Annual HVAC Maintenance for Long-Term Savings
Think of this like an oil change for your HVAC system.
Regular maintenance improves efficiency, extends lifespan, and keeps energy use in check.
A typical tune-up includes:
Cleaning the outdoor coil
Checking refrigerant levels
Testing capacitors and motors
Calibrating the thermostat
Inspecting airflow and duct connections
I always say: “Preventative care is cheaper than emergency repairs”.
7. Block Sunlight with Curtains, Blinds, or Window Film
Direct sunlight heats your home quickly, forcing your AC to work harder.
Use blinds, blackout curtains, or solar window film during the hottest parts of the day.
In one house I serviced in Grove City, switching to thermal curtains alone dropped the living room temp by 4 degrees without touching the thermostat.
8. Upgrade to a High-Efficiency AC Unit If Yours Is Over 12 Years Old
Today’s air conditioners are vastly more efficient than those from even 10-15 years ago.
SEER ratings (Seasonal Energy Efficiency Ratio) are the key metric. The higher the SEER, the more efficient the system.
If your system is older than 12 years and struggling, an upgrade could save you 20-40% in energy costs.
Be honest with yourself: If you're spending hundreds a year on repairs, it might be time.
9. Use Zoned Cooling to Avoid Wasting Energy on Empty Rooms
Zoning allows you to control temperatures in different areas of your home.
This prevents overcooling rooms you’re not using.
Even if you don’t have a full zoning system, consider closing vents in rarely-used rooms or using a mini-split system for hard-to-cool areas.
A Personal Note from the Field
I once had a customer in Dublin who’d replaced their entire AC system and still had high bills. When I walked through the home, I noticed two key things: their smart thermostat was running inefficient schedules, and their attic insulation was thin. We tweaked the programming and added some blown-in insulation. Their next bill? $70 less.
Lesson? Saving energy isn’t always about new equipment. It’s about the little things done right.
AI Tools That Help
Here’s where technology is changing the game:
AI-enabled smart thermostats learn your patterns and weather conditions.
Usage tracking apps like Sense or EnergyHub can tell you exactly what appliances are using power and when.
HVAC performance analytics (available through some modern systems like Trane Link or Carrier Infinity) can alert technicians and homeowners to energy spikes, dirty coils, or inefficiencies before they become problems.
Bottom line: AI isn’t replacing techs, but it is helping homeowners make smarter, faster decisions.
By now, you’ve learned practical and proven ways to reduce your cooling costs—without investing in an expensive system overhaul.
The challenge? High energy bills are caused by inefficient settings, leaks, or outdated habits.
If you're unsure which tip applies best to your home, connect with a Fire & Ice Home Comfort Guide or schedule a maintenance visit.
Money Saving Tips:
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Raise your thermostat setting to 78°F
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Change filters every 1-3 months
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Seal ducts and windows
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Use ceiling fans to boost comfort
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Install or optimize a smart thermostat
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Get annual HVAC maintenance
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Block sunlight during peak hours
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Upgrade old AC systems if inefficient
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Use zoned cooling when possible
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Meet with a Fire & Ice Comfort Guide to get an exact quote on a new air conditioner that fits your home and lifestyle.
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Schedule an AC tune-up with one of our experienced service technicians to make sure your system is running at peak efficiency.
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Visit our Learning Center for more helpful HVAC resources and energy-saving tips.
You don’t need to overhaul your whole HVAC system to save energy. Start small. Stay consistent. And remember: the best system in the world still needs smart usage to truly pay off.
We’ve been in thousands of homes in Central Ohio, and the biggest difference between high bills and low ones isn’t always the equipment. It’s the habits.
And while the Department of Energy may say 78°F is the ideal setting — let’s be real — most of us in Ohio aren’t going to be comfortable at that temp. So find your balance, be smart about usage, and if you’re not sure where to start, we’re here to help.
