How a Mini-Split Works
A ductless mini-split has an outdoor compressor unit connected to one or more indoor air-handling units, mounted on a wall or ceiling. There's no ductwork — refrigerant lines run directly between the units through a small hole in the wall.
Where They Make the Most Sense
- Room additions or garage conversions that were never connected to the home's existing ductwork.
- Older homes without ducts, where installing traditional ductwork would be costly or impractical.
- Spaces with different comfort needs — a Florida room, home office, or in-law suite that runs hotter or colder than the rest of the house.
- Small commercial spaces like a single office, server room, or retail add-on that needs independent temperature control.
What to Consider Before Installing
- Zoning: Each indoor unit can be controlled independently, which is useful but means thinking through how many zones you actually need.
- Placement: Indoor units need a clear wall or ceiling location with a path to the outdoor unit that isn't too long.
- Sizing: An undersized unit won't keep up in Florida heat; an oversized one cycles inefficiently. Sizing should be based on the specific room, not guesswork.
Mini-Split vs. Central Air
A mini-split isn't usually a replacement for whole-home central air — it's a targeted solution for spaces central air doesn't reach well, or can't reach at all. Many Florida homes use a combination of both.
Talk It Through With a Technician
The right call depends on the specific space, existing ductwork (if any), and how it's used. CoolWave Air Conditioning & Refrigeration (FL license CAC1816907) installs and services ductless mini-splits across Brevard, Indian River & St. Lucie counties, residential and commercial.