InstallationPregunta 23 de 110
What is the primary purpose of providing combustion air to a gas-fired furnace?
a.To cool the electronic controls
b.To supply oxygen for complete and safe fuel combustion
c.To increase supply air temperature
d.To reduce refrigerant pressure
Explicación
A gas furnace needs adequate combustion air so the burner receives enough oxygen for complete combustion. Insufficient air causes incomplete combustion, producing carbon monoxide and sooting. The CMC specifies required openings or ducts based on the appliance input and the confining space.
Referencia Legal: 2022 California Mechanical Code (CMC)Practica las 110 preguntas gratis — sin registro.
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