Gas Fitter Practice · Question
What is the minimum clearance required from combustible materials for a single-wall vent connector serving a Category I appliance?
CSA B149.1 specifies a minimum clearance of 6 inches (150 mm) for single-wall vent connectors from combustible materials.
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Question: What is the minimum clearance required from combustible materials for a single-wall vent connector serving a Category I appliance?
Answer options: ✅ 6 inches (150 mm)
- 1 inch (25 mm)
- 12 inches (300 mm)
- 0 inches (no clearance required)
Correct answer: 6 inches (150 mm)
Explanation: CSA B149.1 specifies a minimum clearance of 6 inches (150 mm) for single-wall vent connectors from combustible materials.
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