A bath fan duct runs through a cold attic without insulation and shows condensation staining. What should be corrected?
Correct Answer
D) Duct insulation.
Ducts in unconditioned spaces may need insulation and proper routing to control condensation and energy loss.
Why This Is the Correct Answer
Ducts in unconditioned spaces may need insulation and proper routing to control condensation and energy loss.
Why the Other Options Are Wrong
Option A: Leak risk.
Leak risk. addresses a neighboring field issue, but not the condition or method control required for mechanical exhaust duct insulation.
Option B: Positive slope.
Positive slope. addresses a neighboring field issue, but not the condition or method control required for mechanical exhaust duct insulation.
Option C: R-value loss.
R-value loss. addresses a neighboring field issue, but not the condition or method control required for mechanical exhaust duct insulation.
Memory Technique
Field-Method Choice method for Checking Bath: condition first, tool second.
Reference Hint
Study anchor (closed-book): memorize cited field requirement from California Mechanical Code, California Code of Regulations Title 24. / Title 24 California Mechanical Code and California Energy Code cited field requirement.; know the rule or calculation trigger without relying on exam-room lookup.
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