Gas Fitter Practice · Question
What type of venting material is typically used for high-efficiency condensing furnaces due to their corrosive flue gases?
Condensing furnaces produce acidic flue gases, requiring corrosion-resistant materials like ULC S636 certified PVC or CPVC for venting.
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Question: What type of venting material is typically used for high-efficiency condensing furnaces due to their corrosive flue gases?
Answer options:
- Type B vent
- Single-wall galvanized pipe ✅ PVC or CPVC (ULC S636 certified)
- Masonry chimney
Correct answer: PVC or CPVC (ULC S636 certified)
Explanation: Condensing furnaces produce acidic flue gases, requiring corrosion-resistant materials like ULC S636 certified PVC or CPVC for venting.
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- What is the maximum allowed pressure for a propane system supplying a residential appliance?
- When installing a gas outdoor appliance, what is the minimum required clearance from an opening into a buildin
- Which code specifies the requirements for the installation of propane-burning appliances and equipment?
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