Mini Split Installation in Hattiesburg, MS
A new system here will heat from November through March and cool from May through October every year. Tell us about the house, and a licensed contractor who covers Forrest County will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of work a year in Forrest County
Your mini-split here has almost no season off. Summer afternoons average 91°F from May through October, six months of the compressor running most days. Homes need heat from November through March, five months a year, when nights average 40°F from December through February. Eleven months of the year, the unit is doing one job or the other.
A new unit installed after January 1, 2023 has to meet 14.3 SEER2 for cooling and 7.5 HSPF2 for heating, whatever brand or size you choose. Forrest County has also logged 115 damaging wind events over the past ten years, and a mini-split mounted and wired correctly holds up to that better than one set up in a hurry.
- 5 months
- November through March, your system heats
- 6 months
- May through October, it cools
- 40°F
- the average winter night it heats against
- 91°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Mississippi requires HVAC contractors to hold a state license.
The State Board of Contractors tests contractors before licensing them and keeps a record of who holds one. That license belongs to the contractor, not to any single job, so it covers this contractor across whatever work they do, not just this installation.
For the mini-split itself, most cities and counties in Mississippi require a permit before the work starts and an inspection once it's done. That inspection is separate from the license. It is the local building office looking at how the unit was installed, not a check on who the contractor is.
Source: Mississippi State Board of Contractors
- Is a mini split worth it?
- For most homes here, yes. Hattiesburg needs heat or cooling 11 months out of the year, and a mini split handles both with one system. It also gives you a heat pump's efficiency without ductwork, which matters if the space you're adding it to doesn't already have ducts running to it.
- How many rooms can a mini split cover?
- That depends on how many indoor heads the outdoor unit is set up to run. Each indoor head covers the room it's mounted in, sized to that room's square footage and layout. A contractor will look at the rooms you want covered and work out how many heads you need and whether one outdoor unit can support them all.
- Can a mini split heat a whole house?
- It can, if there's an indoor head in enough rooms to cover the house. Winter lows here average 40°F, well within what a mini split heat pump is built to handle. The limit isn't the cold, it's coverage. A room with no head and no open path for air from another room will stay cold no matter how well the rest of the house heats.