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Gas Fitter Practice · Question

What type of exhaust fan is often required in a small room containing a Category I appliance to ensure adequate combustion air?

A make-up air fan is used to bring in fresh outdoor air to replace air consumed by combustion and exhausted by other appliances, preventing negative pressure an

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Question: What type of exhaust fan is often required in a small room containing a Category I appliance to ensure adequate combustion air?

Answer options:

  • Ceiling fan
  • Attic fan ✅ Make-up air fan
  • Furnace blower

Correct answer: Make-up air fan

Explanation: A make-up air fan is used to bring in fresh outdoor air to replace air consumed by combustion and exhausted by other appliances, preventing negative pressure and ensuring proper combustion air.

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