A new, energy-efficient AC unit can significantly cut cooling bills, potentially by half, especially when replacing an older, less efficient model.
If your energy bills have been creeping higher each summer, your air conditioner may be to blame. Older AC systems can lose efficiency over time, requiring them to run longer and work harder to maintain a cool home.
That leads many St. Louis homeowners to ask: Can replacing my AC really cut my cooling bills in half?
The answer is… it depends — but for some households, the savings can be dramatic. Let’s break down why.
How AC Efficiency Has Improved
Air conditioners are rated by their SEER (Seasonal Energy Efficiency Ratio). The higher the SEER, the more efficient the system.
- Older units (10+ years old) often have a SEER rating of 8–10.
- Modern systems today start at 14 SEER, with high-efficiency options reaching 20+ SEER.
That’s not just a small upgrade — a new high-efficiency system can deliver 30–50% more cooling output for the same amount of energy.
When You Might See a 50% Drop in Cooling Costs
You’re more likely to see dramatic energy bill reductions if:
- Your current system is more than 12–15 years old
- You’ve had frequent repairs or refrigerant leaks
- Your AC runs almost nonstop during the summer
- You choose a high-SEER model (18+ for maximum savings)
- Your ductwork is properly sealed and insulated
If your current AC is relatively new and already efficient, the savings from replacement will be smaller — but you’ll still benefit from fewer repairs and better comfort.
Other Benefits of a New AC
Lower energy bills are just the start. A new system can also:
- Improve indoor air quality
- Reduce humidity in your home
- Operate more quietly
- Provide more consistent temperatures
- Lower your carbon footprint
The St. Louis Factor – Our summers aren’t just hot — they’re humid. An older AC that struggles with moisture removal can make your home feel warmer than it is, causing you to crank down the thermostat and burn more energy. Newer systems are designed to handle both cooling and dehumidification more effectively.
Get the Right System for Your Home
At Thomas Hoffmann Air Conditioning & Heating, we don’t just replace your AC — we custom-size it for your home, your comfort needs, and your budget. As a locally owned and operated company, we offer honest recommendations and won’t push you into a replacement you don’t need.
Bottom line: If your AC is old, inefficient, and costing you a fortune to run, a new high-efficiency model could realistically cut your cooling costs by up to 50% — and keep you far more comfortable during the St. Louis summer.
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At Thomas Hoffmann Air Conditioning & Heating, we pride ourselves on being a locally owned and operated HVAC company. With more than 30 years of experience and a master technician and mechanical engineer as our owner, we can replace, repair, and maintain your business or home’s HVAC system.