How to Use This Review

This is a working study reference organized around the sequence and judgment calls that recur across this course. Use it to test your own reasoning, not as your first exposure to the material.

The Sequence You Should Know Cold

Site assessment → measuring → confirming instructions/specs → placement/clearance → framing → combustion air/venting rough-in → fuel-specific connection → inspection → commissioning → documentation → handover. Know why this order matters, not just the order itself.

Technical Points You Should Know Cold

• Why listed components can’t be mixed across manufacturers, even when visually similar.
• The difference between a clearance figure and a “close enough” approximation.
• Why combustion air needs are different (and often greater) in tightly sealed modern homes.
• Why photo documentation of rough-in work matters uniquely in this trade.
• The difference between a unit that’s installed and one that’s properly commissioned.

Before You Sit the Exam

Work through several Field Application scenarios cold, writing your own reasoning before checking it against the lesson — pay particular attention to the scenarios involving schedule pressure or a customer/GC request to deviate from a requirement, since those judgment calls come up constantly in real fieldwork.