National Home Inspector Practice Exam

During a gas dryer inspection with no exhaust vent observed, what should you recommend?

1. Installing a metal dryer duct vented to the exterior

2. Installing a flexible plastic dryer duct vented to the exterior

3. Indicating a code violation

4. Noting that it is not a problem because of lint trap usage

The correct answer is: Installing a metal dryer duct vented to the exterior

Recommending the installation of a metal dryer duct vented to the exterior is essential for several reasons. First, gas dryers produce moisture and potentially harmful gases such as carbon monoxide during operation, which must be safely vented outside to avoid indoor air quality issues. A metal duct is preferred because it is durable, provides a smooth interior surface that minimizes lint buildup, and is less susceptible to damage compared to plastic options. Using flexible plastic ducts is not advisable because they can pose a fire hazard, as lint can accumulate in their walls and cause blockages. Additionally, they can become easily crushed or damaged, which can lead to further safety concerns. Referring to a code violation is accurate, but it doesn't address the immediate action needed to resolve the issue. Indicating that there's no problem due to lint trap usage overlooks the potential hazards associated with inadequate venting and the limitations of lint traps, which are not designed to handle all moisture and gases generated by the dryer. Thus, promoting the installation of a metal duct provides a safe, compliant solution that resolves these concerns effectively.