HVAC Installation in Durham, NC
A new system here will heat from October through April and cool from May through September every year. Tell us about the house, and a licensed contractor who covers Durham County will get in touch.
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Durham asks a new system to run almost year round
Heat runs here from October through April, seven months of the year, with winter nights averaging 31°F from December through February. Summer afternoons average 88°F, and the air conditioner carries the load from May through September. Together that is 12 months where a home in Durham County needs one or the other.
Most homes here heat with electricity, so a new system depends on a grid that does not always hold up. In North Carolina, a quarter of households lost power for at least 24 hours in 2024, and Durham County has logged 7 winter storms and 104 damaging wind events over the past ten years. A new system has to be sized and installed to work through that, not just on a calm night.
- 7 months
- October through April, your system heats
- 5 months
- May through September, it cools
- 31°F
- the average winter night it heats against
- 88°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
North Carolina requires HVAC contractors to hold a state license.
That license is issued to the contractor, not to the job, so the same license covers whatever system they install next. The State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors keeps the record of who holds it, which means there is a state office behind the name on the paperwork.
For an installation, the license is the credential behind the person doing the work, but the job itself usually gets a second check locally. In most cities and counties, putting in a new furnace, air conditioner or heat pump needs a permit from the local building office, and that work gets inspected once it is done.
Sources: North Carolina General Assembly · North Carolina State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors
- When should I replace my HVAC system?
- Once your furnace or air conditioner is past 12 years old and needs repairs more than once a year, replacing it makes more sense than keeping it patched together. Watch for signs like uneven heating between rooms, a system that runs constantly, or a jump in your energy bills with no other explanation. In Durham your heating runs October through April and your cooling runs May through September, so the system gets little rest across the year. Waiting for a total breakdown in the middle of winter, when nights average 31°F, means going without heat until a contractor can get a new system in.
- Should I replace my furnace and air conditioner at the same time?
- If both are original to the house and getting close in age, replacing them together is usually the better move. A furnace and air conditioner installed at the same time are matched to work together, and pairing an old furnace with a new air conditioner, or the other way around, can mean the newer unit never runs at its best. It also means one visit and one inspection instead of two separate jobs down the road. If one system is much newer than the other, a contractor can tell you whether it makes sense to wait or replace both now.
- What happens during an HVAC installation?
- A contractor removes the old furnace, air conditioner or heat pump and sets the new equipment in its place, then connects it to your ductwork, electrical, and for a furnace, the gas line or venting. They check that the ducts are sized right for the new system and seal up any connections. Once it's running, they test it through a full cycle and check the refrigerant charge, airflow, and thermostat settings. In most cities and counties this work needs a permit from the local building office and an inspection when it's done, so the contractor will handle scheduling that with the city or county.