M1 · area 05 · subtopic 0501
Combustion Air
19 percent of the M1 Residential Mechanical Inspector exam. At 60 questions, that is roughly 11 to 12 questions, each with about 120 seconds of budget including the lookup.
- Exam
- M1
- Area
- Combustion Air
- Weight
- 19%
- Questions
- ~11 to 12
What this subtopic covers
Proper sources of air supply for fuel-burning appliances, size and location of openings, and materials and installation of combustion air ducts.
Outline caveat
ICC labels this outline as applicable for exams built prior to July 1, 2015. Confirm the current outline with ICC before testing.
How to drill it
- Find the chapter of the International Residential Code that carries this subject and read it once for structure, not retention: what lives here, what gets sent elsewhere, which tables exist.
- Write your own plain-language phrases for what this subtopic covers, then note the code's terms beside them. Mismatches between the two columns are exactly where exam questions cost you time.
- Run timed lookups: pick a requirement named in the descriptor above, start a stopwatch, find the governing text in your book, stop. Log the seconds. Past two minutes is a miss even when the answer is right.
- Weight your reps to the number above. Roughly 11 to 12 questions means this subtopic deserves a dedicated drill session of its own.
2024 IRC Fast-TabsPre-printed tabs for the 2024 edition. Place them yourself; the placement is the study.Check priceTranslation trap on this subtopic
does the furnace closet need a vent: the code files this as combustion air. Combustion air is 19 percent of M1 as a single undivided subtopic, the heaviest concentration on any of the four exams.
The rest of area 05: Combustion Air (19%)
| Subtopic | Weight |
|---|
The kit that goes on the table
2024 IRCThe book itself
2021 IRCIf you register on 20212024 Fast-TabsPlace them yourself
Construction Master ProFeet-inch math, no errorsMatch the book and tabs to the edition you register for.Confirm which, first.
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