Backdrafting can occur when venting orientation is incorrect; what hazard does this create?

Backdrafting can occur when venting orientation is incorrect; what hazard does this create?

• A. Backdrafting and CO exposure into the living space.
• B. Improved indoor air quality
• C. Reduced energy consumption
• D. No safety impact

Answer: (A)

When venting is not oriented correctly, exhaust and combustion gases can be drawn back into the living space instead of being vented outside. This backdrafting brings with it carbon monoxide, a colorless, odorless gas that is deadly at higher concentrations. Because CO symptoms can be vague—headache, dizziness, nausea—people may not realize they’re being exposed, making this a serious safety risk. So the hazard created is backdrafting and CO exposure into the living space. This does not improve indoor air quality or reduce energy use, and it clearly has safety implications.

When venting is not oriented correctly, exhaust and combustion gases can be drawn back into the living space instead of being vented outside. This backdrafting brings with it carbon monoxide, a colorless, odorless gas that is deadly at higher concentrations. Because CO symptoms can be vague—headache, dizziness, nausea—people may not realize they’re being exposed, making this a serious safety risk. So the hazard created is backdrafting and CO exposure into the living space. This does not improve indoor air quality or reduce energy use, and it clearly has safety implications.