Gas Fitter Practice · Question
What is the minimum volume of combustion air required for a gas appliance operating in an unconfined space?
CSA B149.1 specifies minimum combustion air requirements to ensure complete combustion and prevent CO production.
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Question: What is the minimum volume of combustion air required for a gas appliance operating in an unconfined space?
Answer options: ✅ 50 cubic feet per 1,000 BTU/hr input.
- 100 cubic feet per 1,000 BTU/hr input.
- Insufficient information, depends on ventilation.
- Not applicable, unconfined spaces do not require minimum volume.
Correct answer: 50 cubic feet per 1,000 BTU/hr input.
Explanation: CSA B149.1 specifies minimum combustion air requirements to ensure complete combustion and prevent CO production.
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