Gas Fitter Practice · Question
What is the minimum required separation distance between a mechanical air intake opening and a vent termination from a gas appliance?
CSA B149.1/B149.2 generally requires a 3-meter (10-foot) separation to prevent flue gases from being drawn into the building through the air intake.
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Question: What is the minimum required separation distance between a mechanical air intake opening and a vent termination from a gas appliance?
Answer options:
- 0.5 meters (1.6 feet)
- 1 meter (3 feet) ✅ 3 meters (10 feet)
- As per manufacturer's instructions, no code minimum
Correct answer: 3 meters (10 feet)
Explanation: CSA B149.1/B149.2 generally requires a 3-meter (10-foot) separation to prevent flue gases from being drawn into the building through the air intake.
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