Garages, lanais, and back bedrooms in Central Florida heat up fast. Running new ducts to reach them costs a lot and makes a mess. A ductless mini split fixes one room at a time. Search ductless mini splits Orlando and you get brands and BTU charts, but almost nothing about the circuit that feeds the unit.
We take these calls all year from Winter Park, Oviedo, and Apopka. Almost always, the job starts at the panel and not at the wall unit.
Start at the Panel, Not the Showroom
Nearly every mini split needs a circuit of its own. The breaker size depends on the model you pick. Panel space decides which ductless mini splits Orlando homes can support, so start there.
Plenty of older homes here still run 100-amp service. Add a mini split to a house with a big AC and a pool pump, and the math gets tight. A load check tells you where you stand before you buy.
A licensed pro can run that check as part of an electrical safety inspection. It takes about an hour and saves a lot of guessing later.
Voltage is the next question. Small heads often run on 115 volts, while larger ones run on 230 volts and need a two-pole breaker. A 230-volt unit cannot share a circuit with lights or outlets.
Plug-in models look easy, and in some rooms they are. Even so, they still need their own outlet. An extension cord is never a safe answer here.
Size It for Attic Heat and Humidity
Sizing starts with heat gain, not floor area alone. Here the unit fights attic heat, sun on the walls, and damp air from June into October. A garage bay with a west wall needs more capacity than a shaded bedroom of the same size.
Room size is still a good place to start:
- A small bedroom or home office: one small head is usually enough
- A large main bedroom or open den: step up a size
- A garage or sun room: size up again, since both gain heat all day
- Two or three rooms at once: ask about a multi-zone system
- A screened lanai: plan on outdoor-rated parts and a shaded mount
Going too big backfires. An oversized unit cycles on and off, so it never pulls the damp out of the air. You end up with a cold, clammy room.
Zone count follows from that. A single-zone system pairs one indoor head with one outdoor unit, draws less power, and needs one circuit. A multi-zone system runs two to five heads off one outdoor unit on a single larger circuit, so check panel space before you commit.
Ductless Mini Splits Orlando: Garages, Lanais, and Bonus Rooms
Garage gyms and workshops are the request we hear most. A screened lanai comes next, though that job needs weather-rated parts. Converted attics and in-law suites round out the list.
Each of those spaces sits outside the main duct run. That is why a single head works so well there. It also means the new circuit may have a long run from the panel, so wire size matters.
These rooms also run hot long after sunset. A block wall or a metal garage door holds the afternoon heat and gives it back all evening. Plan for that when you pick capacity.
Efficiency and Smart Controls
Cooling matters far more than heating in this market. Check the SEER2 rating and look for a dry mode that pulls humidity. You can compare certified models at energystar.gov.
A more efficient unit also draws less power. That eases the load on an older panel and trims your July bill.
Most units now offer app control and simple schedules. That lets you cool the garage gym an hour before you use it, and trimming run time in the hot late afternoon trims the bill again. Wi-Fi modules draw almost nothing, so the only catch is signal reach at the far end of the garage.
Storms, Surges, and Outdoor Wiring
Central Florida is the lightning capital of the country. Storms roll through most summer afternoons. Every mini split runs on a small control board, and one nearby strike can cook it.
A whole-home surge device at the panel is cheap cover. Loose or unpermitted work makes the risk worse. On one job we found add-on wiring done without a license, so see how we handled that for an Oviedo family.
The outdoor unit sits in sun, rain, and damp air all year. It needs a weather-rated disconnect within sight, sealed fittings, and a level pad above splash height. Lawn crews and heavy summer rain both take a toll, so good routing keeps water out of the whip and the line set.
What Install Day Looks Like
The electrical side is usually a half-day job. We pull a new circuit from the panel to the outdoor unit. Then we set the disconnect and land the whip on the condenser.
The HVAC crew mounts the head, drills the sleeve, and pulls a vacuum on the line set. The two trades often work the same morning. Good planning keeps them out of each other’s way.
After that comes the inspection. A clean install passes the first time.
Mistakes We Get Called to Fix
Most of our repair calls trace back to a short list of shortcuts:
- A head fed from a nearby outlet circuit instead of its own breaker.
- Wire that is too small for a long run out to a detached garage.
- No disconnect at the outdoor unit, which makes service unsafe.
- A condenser set on bare dirt, so rain splashes into the fittings.
- Unsealed conduit that lets water track back toward the panel.
Each one is easy to avoid at the start. Each one costs real money to fix later.
Get It Wired by a Licensed Team
Manufacturers write their warranties around licensed, permitted work. A circuit you run yourself can void that coverage. Orange and Seminole counties both want a permit and an inspection for the new circuit.
If you are also weighing a central system, our guide to picking an air conditioner for your electrical system covers that side. For a wider look at circuit planning, read our post on dedicated circuits for appliances.
Talk It Through Before You Buy
Thomas Edison Electric serves Orlando, Winter Park, Oviedo, Sanford, Lake Mary, and nearby towns. Our licensed team wires the ductless mini splits Orlando homeowners add to garages, lanais, and bonus rooms. Call (407) 490-0004 to book a visit. Florida license EC13015487.