HVAC Installation in St. George, UT
A new system here will heat from October through May and cool from June through September every year. Tell us about the house, and a licensed contractor who covers Washington County will get in touch.
Tell us about the job
It takes about a minute.
A system sized for both ends of the year
Your new furnace or heat pump has to work almost every month here. Homes in Washington County need heat from October through May, then cooling for the four months after that, June through September. Winter nights average 28°F. Summer afternoons run 90°F. Whatever gets installed has to hold up on both ends without strain.
That long a season means more cycles on the equipment than a system built for a shorter stretch. Getting the size right at installation matters here, since there is barely a month where the system gets to sit idle.
- 8 months
- October through May, your system heats
- 4 months
- June through September, it cools
- 28°F
- the average winter night it heats against
- 90°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Utah requires HVAC contractors to hold a state license.
The Division of Professional Licensing tests and keeps records on the contractors it licenses. That license belongs to the contractor, not to any single job. Utah does carve out one exception. Work under $7,000 does not need a licensed contractor. A full system installation almost always runs past that number, so this job falls under the license, not the exception.
A new heating and cooling system also needs a permit from the local building office in most cities and counties, with an inspection once the work is done. That inspection is separate from the license. The license tells you the state has tested and tracked this contractor. The permit and inspection tell you someone local looked at this particular installation and signed off on it.
Sources: Utah State Legislature · Utah Department of Commerce
- When should I replace my HVAC system?
- Replace it when repairs are becoming frequent or the system is old enough that another breakdown feels close. A furnace or air conditioner that's struggling to keep up also costs more to run every month it stays in place. Homes here need heat or cooling most of the year, heat from October through May and cooling from June through September, so a failing system doesn't have much of an off season to wait out. If a contractor is quoting a major repair on an older unit, it's worth asking what a new system would run instead.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, yes. A furnace and air conditioner installed together are matched to work as one system, and pairing new equipment with an old unit can keep the new one from running at its rated efficiency. If one is already failing and the other isn't far behind, replacing them together means the ductwork and electrical work only get disturbed once.
- What happens during an HVAC installation?
- A contractor removes the old furnace and air conditioner, or heat pump, and sets the new equipment in place, then connects it to the ductwork, gas line or electrical circuit, and refrigerant lines. They test the system, check refrigerant charge, and confirm airflow before calling the job done. In most cities and counties, this work needs a permit from the local building office and an inspection once it's finished, and a licensed contractor handles that paperwork as part of the job. Utah requires HVAC contractors to hold a state license for work like this. A contractor will price the job once they know the equipment and the house.