Most Treasure Coast homes have a screened Florida room, a converted garage, an added bedroom, a sunroom, or a casita that the central AC simply can't reach without major ductwork. By April those spaces are uncomfortable. By July they're unusable. By August they sit empty for the rest of summer. The fix is almost always a ductless mini-split, and First Aid Air Conditioning installs them across Port St. Lucie, Jupiter, Hobe Sound, Jensen Beach, Palm City, Tequesta, Saint Lucie West, Hutchison Island, and Stuart.
Family-owned, Florida-licensed, and on Florida room and converted-space projects across the Treasure Coast every week.
You have three real options for cooling an isolated space. A window unit is cheap but loud, blocks the window, and only handles one room with limited dehumidification. Extending the home's central AC ductwork is expensive (often $4,000 to $8,000 in labor and materials) and disrupts the rest of the home for days. A ductless mini-split sits between the two: quieter than a window unit, more efficient than extending central air, and most installs finish in less than a day.
Mini-splits run on inverter compressors that ramp up and down with cooling demand instead of cycling on and off all day. That means better humidity control, lower power use, and quieter operation. The indoor unit mounts on a wall (or a ceiling cassette if you prefer), connects to an outdoor condenser through a small refrigerant line set, and you control it from a remote or a smart-home app.
Florida room conversions: the most common job we see. A homeowner has a screened-in Florida room they want to use year-round. We install a single-zone wall-mount mini-split sized to the room's load with attention to the western exposure (afternoon sun) and the rest of the room's airflow.
Garage conversions: a growing trend, especially in Saint Lucie West and Palm City where homeowners are adding rental space or working-from-home setups. Garage conversions need both cooling and dehumidification, and a mini-split handles both. Florida code requires the garage conversion to have its own conditioned air, so a mini-split is often the only path to permitting.
ADU and casita buildouts: the Treasure Coast has been seeing more accessory dwelling unit (ADU) construction, especially in Martin County. A mini-split is the standard cooling solution because it doesn't require ductwork and meets the typical ADU square footage range.
Hot upstairs rooms: in two-story homes the upstairs bedroom or office often runs ten degrees hotter than the rest of the house because the central AC can't push enough cool air upstairs. A single-zone mini-split in that room solves the problem without changing the central system.
Hot master bedrooms: same idea. If one room is consistently warm because of exposure, distance from the air handler, or duct issues, a mini-split is a clean fix.
Sunrooms and pool houses: classic Florida add-ons that need their own cooling because they're outside the home's conditioned envelope. Mini-splits handle this beautifully.
A single-zone mini-split has one outdoor condenser paired with one indoor head. It's the right call for a single room or a single converted space.
A multi-zone mini-split has one larger outdoor condenser paired with two, three, or four indoor heads. Each head controls its own zone independently. Multi-zone is the right call when you're cooling several added spaces (a Florida room plus a converted garage plus a casita, for example), or when you want different temperatures in different rooms.
System sizing based on the actual room load, brand selection across Mitsubishi, Daikin, Fujitsu, LG and other major brands, indoor head placement, outdoor condenser placement and mounting, refrigerant line set installation and insulation, electrical tie-in to the main panel, smart control setup, post-install commissioning, manufacturer warranty registration, and follow-up service if anything needs adjustment.
For homes in Hobe Sound, Hutchison Island, Tequesta, and the coastal parts of Jupiter and Jensen Beach, we add coastal-grade coil protection on the outdoor unit at install time. Salt air will corrode an unprotected outdoor condenser faster than anywhere inland.
Most single-zone installs take less than a day. Multi-zone systems with three or four heads typically take a day and a half. Pricing depends on the brand, the system tonnage, the indoor head style, and the run length to the outdoor unit. We provide a free written estimate after a site visit. Hearth financing is available on qualified projects, with loans up to $250,000 and no impact on your credit to see options.
Call 772-418-9787 to schedule a free written estimate on a ductless mini-split for your Florida room, garage conversion, ADU, or any space your central AC can't reach.
