HVAC Installation in Stockton, CA
A new system here will heat from November through April and cool from May through September every year. Tell us about the house, and a licensed contractor who covers San Joaquin County will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of the year, one system or the other is running
Stockton only gets a real break from heating and cooling for about a month. Winter nights average 40°F from December through February, so the furnace runs November through April, six months straight. Then summer afternoons hit 91°F and the AC takes over from May through September. A new system here has to handle both ends without much rest between them.
Most homes in the area heat with gas, and whatever you install has to meet the federal minimum efficiency standard. Wind is worth planning around too. The county has logged 21 damaging wind events over the past ten years, and statewide, 17% of households lost power for at least 24 hours in 2024. If your heating or cooling depends on the grid staying up, that is part of the decision.
- 6 months
- November through April, your system heats
- 5 months
- May through September, it cools
- 40°F
- the average winter night it heats against
- 91°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
California requires HVAC contractors to hold a state license.
The Contractors State License Board tests HVAC contractors before they're licensed and keeps a record of who holds one. That license covers the contractor, not this one job, so it follows the business across everything it takes on.
For this job, that license is what stands behind the work. In most cities and counties, putting in a new furnace or air conditioner needs a permit from the local building office, with an inspection once the work is finished. That inspection is separate from the license. It's the check that the gas connections, the wiring and the ductwork were done right in your home.
Sources: California Legislative Counsel · Contractors State License Board
- When should I replace my HVAC system?
- Once your system is old enough that repairs keep coming back, replacement usually makes more sense than another fix. A furnace or air conditioner working harder each year to do the same job is losing efficiency, and that shows up in the bill. If a contractor has been out more than once for the same problem, that is a sign the unit is at the end of its life rather than having a bad month. With 11 months of the year here calling for either heat or cooling, a system that is struggling has very little time to rest and recover between seasons.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, replacing them together is often worth asking a contractor about, though it is not required. A furnace and air conditioner installed at different times can still work fine side by side as long as each is sized correctly for the home. The main reason people do both together is that a furnace and coil from the same system are matched to work together efficiently. A contractor can look at the age and condition of each unit and tell you whether pairing the work 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, refrigerant lines, and electrical. Once everything is connected, the system gets tested and the airflow and controls are checked to make sure the unit is running the way it should. The exact steps depend on whether it is a furnace, an air conditioner, or both, and on what condition the ducts and connections are already in. A contractor can walk through what the job will involve for your specific setup before work starts.