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A properly sized, high-efficiency AC keeps operating costs low. Get free quotes from certified contractors.
Get Free Quotes| SEER / SEER2 Rating | Monthly Cost (Summer) | Annual Cost | vs 13 SEER |
|---|---|---|---|
| 8 SEER (very old) | ~$252/mo | ~$2,520/yr | +$680 more |
| 10 SEER (old) | ~$202/mo | ~$2,016/yr | +$176 more |
| 13 SEER | ~$155/mo | ~$1,550/yr | Baseline |
| 15 SEER2 (FL minimum) | ~$135/mo | ~$1,348/yr | −$202 saving |
| 16 SEER2 | ~$126/mo | ~$1,264/yr | −$286 saving |
| 18 SEER2 | ~$112/mo | ~$1,124/yr | −$426 saving |
| 20 SEER2 | ~$101/mo | ~$1,008/yr | −$542 saving |
| 22 SEER2 (premium) | ~$92/mo | ~$916/yr | −$634 saving |
| 28 SEER2 (highest) | ~$72/mo | ~$720/yr | −$830 saving |
For a typical 3-ton, 13 SEER system in a 2,000 sq ft Florida home, AC operating costs average $120–$200 per month during summer — accounting for roughly 50–60% of your total electric bill. South Florida homeowners typically pay more due to higher temperatures. Upgrading to 18 SEER2 can reduce this by $35–$50 per month.
Florida homeowners run their AC 8–14 hours per day for 10–12 months per year — far more than the national average of about 3 months. This, combined with Florida's heat and humidity requiring your system to work harder, means AC can account for 50–65% of your summer electric bill. Older systems with low SEER ratings, leaky ducts, and poor insulation compound the problem.
A 3-ton AC unit uses approximately 3.0–3.5 kWh per hour when running. At FPL's average rate of $0.14/kWh, that's about $0.42–$0.49 per hour. Running 10 hours/day costs roughly $4.20–$4.90/day, or $126–$147/month. A 22 SEER2 unit uses about 40% less electricity for the same cooling output.
Yes — more so in Florida than any other state. Because Florida homeowners run their AC for 10+ months per year, efficiency improvements accumulate much faster. Upgrading from 13 SEER to 18 SEER2 saves approximately $400–$500 per year on a typical home. Over 15 years, that's $6,000–$7,500 in electricity savings — often exceeding the upgrade cost premium.
Florida Energy Star and FPL recommend 78°F when home, 82°F when away, and 85°F when on extended vacation. Every degree lower costs approximately 3–5% more. Most Florida homeowners find 76–78°F comfortable when combined with ceiling fans. A smart thermostat that automatically adjusts when you leave can save $150–$250/year with no behavior change required.
The most effective strategies for reducing your FPL bill in summer: (1) raise thermostat to 78°F, (2) install a smart thermostat, (3) change AC filters monthly, (4) have ducts inspected and sealed, (5) upgrade attic insulation to R-38+, (6) sign up for FPL's Time of Use rate plan, and (7) if your AC is over 12 years old with SEER below 14, replacing it will likely reduce your bill more than any other single action.
