Load & DesignQuestion 12 of 110
Under the California Mechanical Code, when is a permit generally required for HVAC work?
a.Only for commercial buildings
b.Only when replacing a thermostat
c.When installing, altering, or replacing mechanical equipment such as a furnace or air conditioner
d.Never for residential work
Explanation
The CMC and local jurisdictions require a mechanical permit for installing, altering, or replacing regulated equipment like furnaces, air conditioners, and ductwork. Permits trigger inspection to verify code-compliant, safe installation. Minor maintenance such as filter changes does not require a permit.
Law Reference: 2022 California Mechanical Code (CMC)Practice all 110 questions free — no signup required.
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