HVAC Installation in Dallas, TX
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 Dallas County will get in touch.
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Eleven months of work a year for your new system
In Dallas County, a new system barely gets a break. Summer afternoons average 94°F, and cooling runs May through October, six months straight. Winter brings it back the other way, with nights averaging 38°F from December through February and heat needed November through March. That is eleven months where the system is doing something.
Most homes here heat with electricity, so a lot of that load falls on the same equipment that cools the house in summer. Storms are part of the picture too. Dallas County has seen 22 winter storms and 145 damaging wind events over the past ten years, and statewide, a third of households lost power for at least 24 hours in 2024. Whatever gets installed needs to hold up to daily demand and to weather that occasionally knocks the power out.
- 5 months
- November through March, your system heats
- 6 months
- May through October, it cools
- 38°F
- the average winter night it heats against
- 94°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Texas requires HVAC contractors to hold a state license.
The Texas Department of Licensing and Regulation tests and records the contractor, not the job. Once someone holds that license, they can take on work anywhere in the state, so the license tells you the person showed up qualified. It does not mean an inspector looked at what they installed in your house.
That part comes from the local building office. In most cities and counties, putting in a new heating and cooling system needs a permit before the work starts and an inspection after it is done, and that inspection is what checks the actual installation in your home rather than the contractor's record. Between the two, the license answers for who is doing the work and the permit answers for what got done.
Source: Texas Department of Licensing and Regulation
- When should I replace my HVAC system?
- Replace it when repairs keep adding up or the system is no longer keeping the house comfortable through the summer stretch of 94°F afternoons and the winter nights that drop to 38°F. An old system working overtime in both seasons costs you in comfort even before it fails outright. If a contractor has already been out more than once this year for the same unit, that's usually the sign. A newer system also handles the swing between a Dallas summer and winter with less strain, since homes here need heat or cooling 11 months out of the year.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, replacing them together is often the better call, but it depends on the condition of each one. A furnace and air conditioner installed at different times can end up mismatched, and that mismatch can shorten the life of whichever one is newer. If your furnace still has years left in it, there is no reason to replace it early just because the air conditioner failed. A contractor can look at the age and condition of each unit and tell you whether pairing them makes sense for your house.
- What happens during an HVAC installation?
- A contractor removes the old equipment, sets the new furnace or air conditioner in place, and connects it to the existing ductwork, gas line or electrical circuit, and condensate drain. The refrigerant lines get connected and tested for leaks, and the system is checked for correct airflow and refrigerant charge before it's turned over to you. Electrical and gas connections are tested for safety, not just function. Because Texas requires HVAC contractors to hold a state license through the Texas Department of Licensing and Regulation, make sure whoever does this work is licensed.