How the math works
Annual cooling kWh = (tons × 12,000 × cooling hours) ÷ efficiency ÷ 1,000. Dollar savings = kWh difference × $/kWh. If you entered legacy SEER for the old unit, this tool multiplies it by about 0.95.
Region defaults
- South Florida: 2,800 hours, FPL planning ~13.7¢/kWh from the published typical $136.64 / 1,000 kWh bill style figure. Editable.
- Central Florida: 2,400 hours, Duke FL ~16.63¢ region default; OUC ~15.24¢ also available.
- North Florida: 2,200 hours, Florida EIA-style ~15.1¢ start. Edit to your bill.
These are planning averages, not a live tariff scrape. National “Zone 2” tables that quote ~1,100 hours understate a humid Florida house.
What this page will not do
- No contractor phone, no shop CTA, no “book a free estimate.”
- No invented install prices or brand premiums.
- No promise that a higher SEER2 cuts the whole electric bill in half.
Common questions
How is annual cooling kWh calculated?
Annual cooling kWh = (tons × 12,000 × cooling hours) ÷ efficiency ÷ 1,000. Dollar savings = kWh difference × $/kWh.
Does this estimate my whole electric bill?
No. It estimates cooling kWh only. Fixed customer charges, taxes, riders, water heaters, dryers, and pool pumps are not in the number.
What cooling hours does it use for Florida?
Region defaults: South Florida 2,800 hours, Central Florida 2,400, North Florida 2,200. You can edit them.
What if my old unit is rated in legacy SEER?
The tool multiplies legacy SEER by about 0.95 to convert it to SEER2.