What hazard is created if a clothes dryer duct is disconnected before the exterior termination hood?

When a clothes dryer duct is disconnected before the exterior termination hood, it creates a significant moisture damage hazard and fire hazard.

A disconnected dryer duct allows moist air, lint, and potentially flammable materials to be released into the living space. This moisture can lead to increased humidity levels, which promotes the growth of mold and mildew, causing structural damage to the home and negatively impacting indoor air quality. Furthermore, the buildup of lint inside the duct or around the dryer becomes highly flammable. If a spark occurs—whether from the dryer itself or another source—this accumulated lint can ignite, creating a fire hazard.

Therefore, the critical connection of the dryer duct to the termination hood is essential for safely venting hot, moist air outside and maintaining a safe environment within the home.