HVAC Journeyman Practice Exam 2026 - Free HVAC Practice Questions and Study Guide

Motorized louvers must be interlocked with the equipment to ensure proper coordination between the louvers and the operation of the HVAC system. Interlocking typically refers to a safety and operational feature that ensures the louvers operate in conjunction with the equipment they are connected to, such as a fan or an air handling unit. This interlock prevents situations where the equipment could operate without the louvers being in the correct position, which could lead to improper airflow, reduced efficiency, or even system damage.

When louvers are interlocked, the HVAC system can automatically open or close the louvers depending on the equipment's demand for fresh air or exhaust, thereby improving overall efficiency and maintaining safe operating conditions. This relationship is crucial in systems designed to maintain specific temperature or pressure conditions.