HVAC Installation in Round Rock, TX
A new system here will heat from November through March and cool from April through October every year. Tell us about the house, and a licensed contractor who covers Williamson County will get in touch.
Tell us about the job
It takes about a minute.
Round Rock asks for seven months of cooling and five of heat
Summer afternoons here average 95°F, and the system you install has to hold that back from April through October. Winter is shorter but not gentle, nights average 40°F from November through March, and half the homes here heat with electricity, so a system that runs on both sides of the year needs to be sized for both.
Williamson County has seen 58 damaging wind events and 10 winter storms over the past ten years, and across Texas a third of households lost power for at least a day in 2024. A new system should be matched to a home that may lose power in the middle of a heat wave or a cold snap, not just to a mild afternoon.
- 5 months
- November through March, your system heats
- 7 months
- April through October, it cools
- 40°F
- the average winter night it heats against
- 95°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 issues that license, and it tests and tracks the contractor, not the crew on your roof or in your attic on a given day. The license stays with the business, so it covers every job that contractor takes on, but it does not mean an inspector signed off on your particular installation.
That sign-off comes from the local building office instead. Putting in a new furnace, air conditioner or heat pump in most Texas cities and counties needs a permit before the work starts and an inspection once it's done. The license tells you the contractor was tested and is on record with the state. The permit and inspection tell you this installation, in this house, got checked.
Source: Texas Department of Licensing and Regulation
- When should I replace my HVAC system?
- Once repairs start happening every year, or the system is old enough that a breakdown could leave you without heat or air for days, it is time to replace it rather than keep patching it. Age matters here more than in mild climates. Your system runs nearly every month of the year in Round Rock, either heating through the winter or cooling through summer afternoons that hit 95°F, so it logs more hours than the same unit would somewhere with a real off season. If your furnace or air conditioner is struggling to keep up, or your energy bills have crept up with no other explanation, get a contractor to look at it before you're stuck deciding in the middle of a heat wave or cold snap.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, yes, it usually makes sense to replace them together. A furnace and air conditioner installed at the same time are matched to work with each other, and pairing a new one with an old one can mean the new unit never runs at its best. That said, if one is much newer than the other, there is no reason to replace something that still has years left in it. A contractor can look at the age and condition of both and tell you honestly whether replacing one now and the other later 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 your ductwork, electrical, and in many cases gas line and refrigerant lines. They test the system once it's in, checking that it heats or cools correctly, that airflow through your ducts is right, and that everything is sealed and safe. Depending on your home, they may also need to make small changes to the ductwork or wiring so the new equipment fits and runs properly. The exact steps depend on what you're replacing and the layout of your house, so a contractor walking through your specific setup will give you a clearer picture than a general list.