Clogged dryer vents decrease dryer operating efficient, increase drying time, expose your clothing to increased heat, and potentially cause house fires. Aside from the dangers created by debris blocking up a dryer vent, operating efficiency is lost because a dryer unable to perform the principle function of displacing water vapor.
Appliance manufactures recommend dryer vent cleaning annually; however, such frequency is probably unnecessary. We recommend inspection annually, but the service is performed usually every two to three years. Dryer vent systems with vents over 20 feet require an increased amount of maintenance because exhaust pressure decreases as the vent length increases, thus lint is able to settle and accumulate.