Which statement about gas dryer venting is correct?

• A. Gas dryers may vent indoors.
• B. Gas dryers must be vented to outdoors.
• C. Gas dryers vent into the home plumbing system.
• D. Gas dryers vent to a chimney.

Answer: (B)

Gas dryers produce combustion byproducts and warm, moist air that must be removed from the living space. If this exhaust stays inside, people can be exposed to carbon monoxide and higher humidity, which can lead to health risks and mold growth. There’s also a fire risk from lint that can accumulate inside the dryer vent path. For safety and code compliance, the exhaust must be vented to the outdoors through a metal duct with a proper vent hood and backdraft damper. Venting to a chimney isn’t appropriate because chimneys aren’t designed for dryer exhaust and can allow backdrafts and lint buildup, while venting into the home plumbing system is unsafe and not feasible. Therefore, outdoor venting is the correct requirement.