Mini Split Installation in Thibodaux, LA
A new system here will heat from November through February and cool from April through October every year. Tell us about the house, and a licensed contractor who covers Lafourche Parish will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of work for a mini-split here
In Thibodaux, a mini-split runs almost year round. Cooling carries the load April through October, seven months of afternoons averaging 90°F. Heat picks up November through February, on nights that average 47°F. That leaves one slow month on either side and not much rest for the system.
Because it does both jobs most of the year, a new unit still has to meet the federal minimum either way. Built after January 1, 2023, it needs 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. Power matters too. Almost half of Louisiana households lost power for at least a day in 2024, and this parish sees its share of damaging wind. A mini-split that shuts down clean when the power drops will start back up on its own once it returns.
- 4 months
- November through February, your system heats
- 7 months
- April through October, it cools
- 47°F
- the average winter night it heats against
- 90°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Louisiana requires HVAC contractors to hold a state license.
The Louisiana State Licensing Board for Contractors tests and records the contractor, not the job. So the license tells you the person or company doing your install has passed that bar, but it does not follow that individual mini-split up your wall and check it. That part falls to someone else.
That someone else is your local building office. Installing a mini-split needs a permit in most cities and parishes, and an inspection once the work is done. The permit puts the job on record and the inspection is a second set of eyes on the line set, the electrical hookup and the mounting, separate from the state license and separate from the contractor who did the work.
Source: Louisiana State Licensing Board for Contractors
- Is a mini split worth it?
- For most homes, yes, especially if you're heating or cooling a room your main system doesn't reach well or adding on to a space with no ductwork. Thibodaux runs cooling from April through October and needs heat from November through February, so the system earns its keep most of the year. It also gives you a heat source that isn't tied to gas lines, which matters here since most homes already heat with electricity. A contractor can look at your specific rooms and tell you what size and how many heads make sense.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head or several, depending on the system. Each indoor head is sized for the room it's in, so a one-to-one setup works well for an addition or a single problem room, while a multi-zone system can cover several rooms off one outdoor compressor. The right count depends on the square footage and layout of each room, which is something a contractor needs to walk through in person rather than estimate from a general answer.
- Can a mini split heat a whole house?
- It can, if it's sized and laid out for that from the start. A multi-zone mini split with enough indoor heads placed in the right rooms will heat an entire house, and heat pump technology handles Thibodaux's winters fine since nighttime lows only average 47°F, nowhere near the point where a heat pump struggles. What it takes is a load calculation for the whole house, not just one room, so the outdoor unit and each indoor head are matched to what the space actually needs. That's a job for a contractor to size correctly rather than something to guess at.