Definition
Direct answer
Defective combustion venting can allow flue gases or carbon monoxide to enter occupied areas. On the NHIE Practice Test, treat Which visible condition can indicate unsafe combustion venting as a concept to understand, not an answer letter to memorize. Review how it affects safety, code interpretation, jobsite decisions, or timed problem solving, then answer a short practice set tied to Structural concepts, Roofing and exterior, Electrical and plumbing basics.
How to use this answer
Read the answer once, then prove it by choosing an answer in a practice question before looking at the explanation. If the miss repeats, tag the domain as HVAC and drill a smaller set before returning to mixed practice.
Prep path
NHIE Study Guide
Independent NHIE study guide for home inspection systems, report writing, safety defects, and timed exam review.
SamplesNHIE Sample Questions
Public NHIE Practice Test sample questions with explanations.
PracticeOpen NHIE Practice Test
Start with the 20-question free set before deciding whether to unlock the full question bank.