Mini Split Installation in Jacksonville, FL
A new system here will heat from December through February and cool from April through October every year. Tell us about the house, and a licensed contractor who covers Duval County will get in touch.
Tell us about the job
It takes about a minute.
Ten months of work a year in Duval County
A mini-split here runs almost year round. Cooling from April through October, seven months, on afternoons that average 91°F. Heat from December through February, when nights average 46°F. That leaves only a couple months where it can sit idle.
A new unit manufactured now has to meet the federal minimum for a split-system heat pump, 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. With this much cooling season ahead of it, that efficiency rating is doing real work most of the year. Duval County also sees its share of damaging wind, so how the outdoor unit is mounted and secured matters as much as the equipment itself.
- 3 months
- December through February, your system heats
- 7 months
- April through October, it cools
- 46°F
- the average winter night it heats against
- 91°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Florida requires HVAC contractors to hold a state license.
Florida licenses HVAC contractors through the Construction Industry Licensing Board. That license belongs to the contractor, not to the job, so it stays with them from one installation to the next rather than being issued fresh for your mini-split.
For this job, that license is the thing standing behind the work. In most cities and counties in Florida, installing a mini-split also needs a permit from the local building office, and an inspector checks the work once it is done. That inspection is separate from the license, and it is where someone outside the contractor looks at how the job was actually done.
Sources: Florida Legislature · Florida Department of Business and Professional Regulation
- Is a mini split worth it?
- For most homes here, yes. Jacksonville needs cooling from April through October and heat from December through February, so a system running most of the year has to earn its keep, and a mini split's efficiency ratings hold up across both jobs. It also puts a compressor and coil in a room that a duct run might not reach well, which matters in additions or older homes with sections outside the main ductwork. A contractor can look at your specific rooms and tell you where it makes the most sense.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head or several, depending on the system. Single-zone systems cover one room or open area. Multi-zone systems split the output across several indoor heads, each with its own thermostat, so you can heat or cool rooms separately instead of running the whole house at once. How many zones a given outdoor unit can support depends on its capacity, and a contractor sizing the job will measure each room to get that right.
- Can a mini split heat a whole house?
- A multi-zone mini split can heat a whole house if it has enough indoor heads placed to cover every room, and it can do that job here since winter lows only average 46°F, well within what a heat pump handles without much strain. What it cannot do is heat a whole house through one indoor head meant for one room. Whole-home coverage means sizing the outdoor unit and the number of zones to match the square footage and layout, which is a job for a contractor to work out room by room.