InstallationQuestion 31 of 110
What is the purpose of maintaining manufacturer-specified clearances to combustibles around a furnace?
a.To improve airflow measurement
b.To prevent overheating of nearby combustible materials and reduce fire risk
c.To lower the refrigerant charge
d.To allow duct expansion only
Explanation
Listed clearances to combustibles ensure the heat radiating from the furnace and vent does not ignite nearby wood, drywall paper, or stored materials. These clearances are set by the appliance listing and the CMC. Maintaining them and service access is required for safe operation.
Law Reference: 2022 California Mechanical Code (CMC)Practice all 110 questions free — no signup required.
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