HVAC Installation in Brookhaven, 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 Lincoln County will get in touch.
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Eleven months of work for one system in Brookhaven
A new system here works almost year round. Heat runs November through March, with winter nights averaging 39°F. Cooling picks up in May and runs through October, with afternoons averaging 91°F. Only one month goes by without either running.
Most homes in this area heat with electricity. When the power goes out, it takes the furnace or heat pump with it. Statewide, 30% of households lost power for 24 hours or more in 2024, and this area has logged 79 damaging wind events over the past ten years. A new install is a chance to plan for that, so the system comes back on by itself once power is restored.
- 5 months
- November through March, your system heats
- 6 months
- May through October, it cools
- 39°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 Board tested this contractor's trade knowledge before issuing the license, and the license belongs to the contractor rather than to any single job. That means the same license is supposed to be in place whether the work is a repair call or a full system change out.
For an installation this size, the license is what makes the contractor accountable for the work, and in most cities and counties here the job also needs a permit from the local building office along with an inspection once the new system is in. That inspection is a separate check on the installation itself, apart from the license the contractor already holds.
Source: Mississippi State Board of Contractors
- When should I replace my HVAC system?
- Once your system is breaking down more than once a season, or a contractor tells you the repair costs more than a new unit is worth, it's time to replace it. An aging furnace or air conditioner works harder to do the same job, and parts get harder to find as it gets older. If your system is heating and cooling fine and repairs are rare, there's no reason to replace it early just because of its age. Homes here need heat from November through March and cooling from May through October, so the system is working most of the year, which is worth keeping in mind when you're deciding whether to fix or replace.
- Should I replace my furnace and air conditioner at the same time?
- If both are old or original to the house, replacing them together usually makes sense. A furnace and air conditioner often share a blower and coil setup, and matching a new unit to an old one can leave you with mismatched capacity or an install that doesn't perform the way it should. If one system is still young and working well, there's no need to replace it just to match the other. A contractor can look at both and tell you whether they're due together or not.
- What happens during an HVAC installation?
- A contractor removes the old furnace, air conditioner or heat pump and sets the new equipment in place, connecting it to the existing ducts, refrigerant lines, gas line or electrical circuit as needed. They check that the ductwork and electrical supply match what the new system needs, since a bigger or more efficient unit sometimes calls for changes there. Once it's running, they test it and check refrigerant charge and airflow. In most cities and counties this job needs a permit from the local building office and an inspection when the work is done, so plan on that step being part of the process.

