Gas Fitter Practice · Question
Which type of vent system uses a fan to push flue gases through the vent pipe, allowing for horizontal runs and smaller diameters?
Category IV vents are mechanical power-vented systems, often used with high-efficiency condensing appliances, allowing for flexible installation with positive p
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Question: Which type of vent system uses a fan to push flue gases through the vent pipe, allowing for horizontal runs and smaller diameters?
Answer options:
- Type B vent
- Type L vent
- Category I vent ✅ Category IV vent
Correct answer: Category IV vent
Explanation: Category IV vents are mechanical power-vented systems, often used with high-efficiency condensing appliances, allowing for flexible installation with positive pressure venting.
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- What is the maximum allowed pressure for a propane system supplying a residential appliance?
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