Gas Fitter Practice · Question
Combustion air requirement:
B149 ventilation/combustion air rules.
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Question: Combustion air requirement:
Answer options: ✅ Adequate per code calculation
- Not required
- Only outdoors
- Only if smell
Correct answer: Adequate per code calculation
Explanation: B149 ventilation/combustion air rules.
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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?
- What is the maximum allowed pressure drop for gas piping within a building, from the point of delivery to the
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