Gas Fitter Practice · Question
When installing a gas-fired water heater in a confined space, what is the minimum required free area for combustion air openings, as a general rule?
The general rule for combustion air in confined spaces is 1 square inch per 1,000 BTU/hr input, with specific code variations. This ensures adequate air for saf
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Question: When installing a gas-fired water heater in a confined space, what is the minimum required free area for combustion air openings, as a general rule?
Answer options: ✅ 1 square inch per 1,000 BTU/hr input
- 2 square inches per 1,000 BTU/hr input
- 3 square inches per 1,000 BTU/hr input
- Not applicable; mechanical ventilation is always required
Correct answer: 1 square inch per 1,000 BTU/hr input
Explanation: The general rule for combustion air in confined spaces is 1 square inch per 1,000 BTU/hr input, with specific code variations. This ensures adequate air for safe combustion.
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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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