Is a mini split worth it in Florida?
Short answer: Yes. In Florida a mini split is a cooler and dehumidifier first: Miami logs 3,931 full-load cooling hours a year (ENERGY STAR), the most of any city on our state pages. Heating matters only in North Florida and the Panhandle. Size each room with the standard chart and go one size up for west-facing or top-floor rooms. Near the coast, pick a unit with the Gold Fin coating (DIY EasyPro or DIY 5th Gen). For the lowest power bill over a long cooling season, pick DIY 5th Gen.
Florida by region
Florida has three kinds of weather for a mini split. The table shows the numbers HVAC sizing uses for each region.
| Region (climate zone) | Summer high | Winter low | Coldest, last 10 winters | Main job |
|---|---|---|---|---|
| Miami (1A) | 90.9°F | 49°F | 35°F | Cooling only |
| Fort Myers (2A) | 92.2°F | 41.6°F | 30°F | Cooling only |
| Tampa (2A) | 91.3°F | 39.8°F | 29°F | Cooling and humidity |
| Orlando (2A) | 92.4°F | 38.4°F | 24°F | Cooling and humidity |
| Jacksonville (2A) | 92.6°F | 29.6°F | 20°F | Cooling, some winter heat |
| Tallahassee (2A) | 94.3°F | 26.5°F | 18°F | Cooling, some winter heat |
| Pensacola (2A) | 92°F | 29.9°F | 13°F | Cooling, some winter heat |
Design temperatures: ASHRAE 2021 climatic design conditions (1% cooling, 99.6% heating dry bulb) for each airport station. Climate zones: 2021 IECC by county (PNNL guide). Coldest: NOAA station records, December 2016 to February 2026.
Cooling in Florida heat and humidity
Florida summers are long and humid. The inverter slows down instead of switching off, so it keeps pulling water out of the air while it cools.
Will it heat on a cold Florida night?
Yes. Florida’s coldest design temperature is 26.5°F in Tallahassee, far above the −12°F and −13°F the MRCOOL DIY series heat down to.
What size for a Florida room
Measure each room (length × width) and match it to an indoor unit.
| Room size | Indoor unit | Single zone voltage |
|---|---|---|
| Up to 250 sq ft | 6K BTU (multi-zone only) | – |
| 251–400 sq ft | 9K BTU | 115V |
| 401–550 sq ft | 12K BTU | 115V |
| 551–800 sq ft | 18K BTU | 230V |
| 801–1,050 sq ft | 24K BTU | 230V |
| 1,051–1,550 sq ft | 36K BTU | 230V |
Go one size up for rooms with west or south windows, a top floor under the roof, high ceilings, poor insulation, or a kitchen. A garage that isn’t insulated also goes one size up. Full sizing guide
Several rooms? See multi-zone systems
What it costs to run in Florida
Yearly cooling cost for one room with Tampa weather, at the Florida average power price.
| Size | DIY Select | DIY EasyPro | DIY 5th Gen |
|---|---|---|---|
| 9K | $237 | $205 | $175 |
| 12K | $315 | $283 | $235 |
| 18K | $452 | $391 | $368 |
| 24K | $641 | $584 | $486 |
| 36K | – | – | $920 |
Estimate, not a quote: cooling BTU × 3,068 cooling hours ÷ SEER2 ÷ 1,000 × 14.99¢. Hours: ENERGY STAR heat pump savings calculator (Tampa). Miami runs about 28% more (3,931 hours), Fort Myers 7% more (3,288), Orlando 5% less (2,915) and Jacksonville about a third less (2,086). Power price: EIA, August 2026.
What the equipment costs
Prices for complete single zone systems: outdoor unit, indoor unit, pre-charged line set and remote. Shipping is free to Florida.
| Size | DIY Select | DIY EasyPro | DIY 5th Gen |
|---|---|---|---|
| 9K | $1,249 | $1,487 | $2,329 |
| 12K | $1,399 | $1,599 | $2,359 |
| 18K | $1,690 | $1,806 | $2,909 |
| 24K | $1,899 | $2,109 | $3,329 |
| 36K | – | – | $3,769 |
Rebates in Florida
MRCOOL’s rebate data lists 5 utilities in Florida with rebates on our DIY models. 2 of them need a participating contractor, so a DIY install usually doesn’t qualify there; for the others, confirm with your utility. The federal 25C tax credit ended for systems installed after December 31, 2025.
| Utility | Up to | Who installs | Series |
|---|---|---|---|
| Duke Energy Progress | $1,000 | Needs a participating contractor | DIY 5th Gen, DIY EasyPro, DIY Select |
| Tampa Electric | $550 | No contractor rule listed, confirm with your utility | DIY 5th Gen, DIY EasyPro, DIY Select |
| City of Tallahassee | $350 | No contractor rule listed, confirm with your utility | DIY 5th Gen, DIY EasyPro |
| Clay Electric Cooperative, Inc | $250 | No contractor rule listed, confirm with your utility | DIY 5th Gen, DIY EasyPro, DIY Select |
| JEA | $200 | Needs a participating contractor | DIY 5th Gen, DIY EasyPro |
Rebates checked November 2026. Amounts change; confirm with your utility.
DIY or a pro
MRCOOL DIY systems are built for a homeowner install: the line set comes pre-charged and connects by hand, so there’s no vacuum pump or refrigerant work. Most people hire an electrician for the new circuit, and permit rules depend on your city. Can you install a mini split yourself?
Which MRCOOL system for Florida
Mini split questions for Florida
Is a mini split worth it in Florida?
Yes. It cools and dries the air through long, humid summers, and heats on the few cold nights in North Florida.
Will it keep up in a Florida summer?
DIY EasyPro and DIY 5th Gen are rated by MRCOOL to cool with outdoor temperatures up to 122°F. Florida stations design for 90.9°F to 94.3°F.
Does the salt air matter?
Near the coast, pick a unit with MRCOOL’s Gold Fin corrosion-resistant coating on the outdoor coil: DIY EasyPro and DIY 5th Gen have it.
How much does it cost to run in Florida?
For a 12K room with Tampa cooling hours at 14.99¢ per kWh, about $315 a year with DIY Select, $283 with DIY EasyPro and $235 with DIY 5th Gen. Estimates, not quotes.
What size do I need for a Florida garage or lanai room?
Use the same chart: measure length × width. A garage that isn’t insulated goes one size up.
Are there mini split rebates in Florida?
Some utilities list rebates for MRCOOL DIY models; see the table above and check each program’s rules. The federal 25C tax credit ended for systems installed after December 31, 2025.
Can I install it myself?
Yes. The pre-charged line set connects by hand, with no vacuum pump. Most people hire an electrician for the circuit, and permit rules depend on your city.
How long does shipping to Florida take?
Verified orders ship from Kentucky in 2 to 4 business days, then 3 to 7 by freight. Shipping is free to Florida.