Installation第 23 / 110 题
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
解析
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.
法律依据: 2022 California Mechanical Code (CMC)免费刷完整 110 道题库 — 无需注册。
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