Package Unit Replacement in Stockton
Roof-mounted and ground-level packaged units, which hold the heating and cooling parts in one cabinet outside the building.
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What the job involves
Package unit replacement in Stockton swaps a single outdoor cabinet that holds the compressor, coils, blower and often a gas heat section. These units sit on a roof curb or on a ground pad, with ducts running through the roof or wall.
A crane or lift often sets rooftop units. The crew disconnects power, gas and ducts, sets the new unit on the curb (or an adapter curb if the footprint differs), seals the duct connections and starts it up.
Roof weight and plans
For homes, Stockton’s residential checklist requires plans when a new unit is installed on a roof. For shops and offices, the nonresidential checklist asks for a structural analysis with a partial roof framing plan for rooftop or heavier replacement units. It also requires duct smoke detection and a Fire Department permit when a unit exceeds 2,000 CFM; the Stockton Fire Department is at (209) 937-8271.
Gas-electric units and Valley Air
Valley Air District’s Rule 4905 covers combination heating and cooling units rated under 65,000 Btu per hour of cooling, which includes many gas-electric package units on homes. The same 14 ng/J NOx limit applies. Ask the contractor to confirm compliance for the exact model.
What affects the price
We couldn’t find a reputable published price range for package units alone, so we don’t list one. The main drivers are tonnage, gas-electric versus heat pump, crane access, curb adapters and any roof framing work. For split-system figures, see the cost guide.
Local factors
| Local factor | What applies in Stockton | How it affects the job or price |
|---|---|---|
| Roof installs (homes) | Plans are required for new units installed on a roof (BLDG-0048) | Adds drawing time; a like-for-like swap on the same curb is simpler |
| Structural analysis (businesses) | Rooftop or heavier replacement units need a structural analysis with a partial roof framing plan (BLDG-0049) | Engineering fees can apply before the permit is issued |
| Large units | Units over 2,000 CFM need duct smoke detection, automatic shutoff and a Fire Department permit (BLDG-0049) | Adds a second permit and wiring for larger commercial units |
| Valley Air NOx limit | Gas combination units under 65,000 Btu/h cooling fall under Rule 4905 | Limits which gas-electric models can be installed |
Common local situations
Package units are common where a home has no closet, garage or attic space for an indoor unit, and on small commercial buildings. Packaged units were mentioned in several Stockton reviews we read, mostly on rooftop jobs. A heavier replacement on an older roof is where structural questions come up.
Questions to ask a contractor
- Is the new unit heavier than the old one, and who checks the roof framing?
- Will it fit the existing curb, or is an adapter needed?
- Is the crane or lift included in the price?
- How will the unit be secured to the curb or pad?
- How long will the building be without heating or cooling during the swap?
What to mention when you call
Say whether the unit is on the roof or the ground, whether it has gas heat, whether the building is a home or a business, and the unit’s tonnage from the label if you can see it safely.
Don’t climb onto the roof to read the label. A photo from a ladder at the roof edge, or the original install paperwork, is enough for a first conversation. If the building is a business, mention its hours, since a rooftop swap may need to happen when the space is closed and the crane can reach the unit safely.
Related replacements
Consider ductwork replacement if roof ducts are old, or a packaged heat pump if you want to drop gas. Permits are explained in the Stockton permit and duct test guide.
Areas served
We connect callers across Stockton and nearby towns.
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