Gas Fitter Practice · Question
What is the primary function of a vent damper on a Category I gas appliance?
A vent damper closes when the burner is off to minimize the amount of indoor conditioned air that escapes up the chimney, improving efficiency.
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Question: What is the primary function of a vent damper on a Category I gas appliance?
Answer options:
- To increase the draft in the vent ✅ To reduce heat loss up the chimney when the burner is off
- To prevent backdrafting of combustion products
- To control the gas pressure to the burner
Correct answer: To reduce heat loss up the chimney when the burner is off
Explanation: A vent damper closes when the burner is off to minimize the amount of indoor conditioned air that escapes up the chimney, improving efficiency.
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