Core TradesQuestion 193 of 700
Under current California requirements, newly constructed dwellings must generally provide:
a.Operable windows only, with no mechanical ventilation
b.Exhaust fans in bathrooms but no whole-house strategy
c.Whole-house mechanical ventilation sized to a minimum airflow
d.Combustion appliances to supply fresh air
Explanation
California energy and ventilation standards require continuous or intermittent whole-house mechanical ventilation sized to a minimum airflow to maintain indoor air quality in tightly built homes. Operable windows alone are not accepted, local exhaust fans are additional to the whole-house system, and combustion appliances are not a ventilation source.
Law Reference: 2025 CA Energy Code (Title 24, Part 6) / ASHRAE 62.2Practice all 700 questions free — no signup required.
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