HVAC 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, most years
In Hattiesburg, a heating and cooling system is rarely idle. Homes here need heat from November through March, then cooling from May through October. Eleven months of the year, the system is doing something, with only a short break in between.
Summer afternoons average 91°F, so the compressor is working hard for six straight months. Winter nights average 40°F, milder than a lot of the country, but the furnace or heat pump still has five months of steady use ahead of it. Just over two-thirds of homes here heat with electricity, which is worth knowing when you are weighing a new system, since it points toward a heat pump handling both jobs instead of a furnace and a separate air conditioner. Whatever you install, it has to be sized for real summer heat and it has to run reliably for most of the year, not just a few weeks of it.
- 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 Mississippi State Board of Contractors tests and licenses HVAC contractors before they can take on this kind of work. That license belongs to the contractor, not to any one job, so it tells you the person or company has been vetted by the state, not that this specific installation has been checked.
That check comes from your local building office. In most cities and counties, putting in a new heating and cooling system needs a permit filed before the work starts and an inspection once it is done. The state license tells you who is allowed to do the work. The permit and inspection tell you the installation itself was done right.
Source: Mississippi State Board of Contractors
- When should I replace my HVAC system?
- Once repairs keep piling up or the system struggles to keep the house comfortable, replacement starts making more sense than another fix. Watch for signs like uneven heating or cooling room to room, a jump in your utility bills, or a system that runs almost constantly to keep up. With 11 months of the year here needing either heat or air conditioning, a system that is struggling does not get much of a break to fail quietly. A contractor can look at the age, the repair history, and how the system is running now to tell you whether it is worth fixing again or time to replace it.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, replacing them together often makes sense, but it depends on the condition of each one. A furnace and air conditioner installed at different times may not match well, and a newer air conditioner paired with an aging furnace can end up limited by the older equipment. Since homes here run the furnace from November through March and the air conditioner from May through October, both halves of the system carry real work all year. A contractor can check the age and condition of each unit and tell you whether replacing one or both is the right call.
- What happens during an HVAC installation?
- A contractor removes the old furnace, air conditioner, or heat pump and sets the new equipment in place, then connects it to your ductwork, electrical, and, for gas furnaces, the gas line. After that, the system gets charged with refrigerant if needed, tested, and checked for proper airflow and temperature. In most cities and counties around Hattiesburg, this work needs a permit from the local building office along with an inspection once the job is done. Mississippi also requires the contractor doing the work to hold a state license, so ask to see it before the job starts.