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Hot & Humid · ~15¢/kWh · 10-month season

Air conditioning in Florida: sizing, costs & the right units

Florida is the most AC-dependent state in the country: cooling season runs roughly March through November statewide and effectively year-round in South Florida. The defining challenge is humidity — equipment here works as hard removing moisture as it does dropping the temperature.

What to look for in Florida

Prioritize dehumidification performance and corrosion resistance (salt air is brutal on outdoor coils near the coasts). Inverter units that run long, low cycles pull far more moisture than oversized units that blast and stop — in Florida, right-sizing matters more than anywhere. ENERGY STAR pays back fast with a 10-month season.

What cooling costs in Florida

Estimated at Florida's average residential rate (~15¢/kWh, approximate) and 8 hours/day. "Per season" assumes 10 cooling months. Your utility rate and usage will vary.

UnitEfficiencyEst. / monthEst. / season
Senville LETO SENL-12CD
Mini-split
 21.2 SEER2 $23 $230
LG Dual Inverter LW1022IVSM
Window
 15 CEER $24 $240
BLACK+DECKER BPACT14WT
Portable
 6.1 CEER $83 $830
Climate-matched

Units that fit Florida's climate

All 49 units
product shot
Best portable
Portable

Midea Duo MAP12S1TBL

4.4(4,210)
Cooling
12,000 BTU
Covers
450 ft²
Efficiency
9 CEER
Noise
53 dB
$499 est.
via partner retailers

Florida AC questions, answered

How many BTU do I need in Florida?

More than the national rule of thumb. Florida's heat and humidity push cooling loads roughly 10–15% above the standard 20 BTU/ft² baseline — our calculator applies this automatically when you select the Hot & Humid climate zone. A typical 300 ft² Florida bedroom lands around 7,500–8,500 BTU.

What type of AC works best for Florida humidity?

Inverter-driven units — mini-splits and inverter window ACs — are the best match. They run continuously at low power, which removes far more moisture than fixed-speed units that short-cycle. If you only need one room cooled, a 20+ SEER2 mini-split is the long-term winner on Florida power bills.

How much does it cost to run an AC in Florida?

At Florida’s average residential rate (~15¢/kWh) and 8 hours a day, an efficient 12,000 BTU mini-split runs about $25–35/month, while an older fixed-speed window unit can exceed $60. Over a 10-month Florida cooling season, the efficiency gap compounds into hundreds of dollars a year.

Electricity rates are approximate state averages; check your utility bill for your exact rate.