NHIE Mechanical Practice Exam 2026 - Free Mechanical Practice Questions and Study Guide

For a gas dryer transition duct, the length limit set is typically 8 feet. This standard is in place to ensure safe and efficient operation. A transition duct is used to connect the dryer to the venting system, and keeping it within this length limit minimizes resistance to airflow, which can help prevent lint buildup and ensure that the dryer operates efficiently. If the duct were longer, it could lead to decreased performance, as the dryer would have to work harder to push air through the extended pathway, potentially causing issues such as overheating or fire hazards. In addition, adhering to this limit is often part of compliance with relevant building codes and safety standards, making it essential for both the safety and effectiveness of the appliance.