Gas Fitter Practice · Question
What type of gas appliance requires a mechanical means to remove combustion products, such as a fan?
Category III appliances operate with a negative vent static pressure and require a mechanical fan to ensure proper exhaust of flue gases.
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Question: What type of gas appliance requires a mechanical means to remove combustion products, such as a fan?
Answer options:
- Category I
- Category II ✅ Category III
- Category IV
Correct answer: Category III
Explanation: Category III appliances operate with a negative vent static pressure and require a mechanical fan to ensure proper exhaust of flue gases.
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Question explanations
- 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?
- What is the maximum allowed pressure drop for gas piping within a building, from the point of delivery to the
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