Gas Fitter Practice · Question
Which type of combustion air system draws all air for combustion directly from outdoors through a sealed duct?
Direct vent systems are sealed from the indoor living space, drawing combustion air from outside and expelling flue gases outdoors, ensuring no interaction with
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Question: Which type of combustion air system draws all air for combustion directly from outdoors through a sealed duct?
Answer options:
- Natural draft
- Atmospheric ✅ Direct vent
- Induced draft
Correct answer: Direct vent
Explanation: Direct vent systems are sealed from the indoor living space, drawing combustion air from outside and expelling flue gases outdoors, ensuring no interaction with indoor air.
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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?
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