What must be equipped on dryer exhaust ducts as a safety feature?

A backdraft damper is an essential safety feature for dryer exhaust ducts because it prevents the backflow of air, which can create hazardous conditions. When the dryer is operating, the damper allows exhaust air to escape outside, but when the dryer is not in use, the damper closes. This function helps to eliminate the possibility of outside air, insects, or other contaminants entering the duct system, thus maintaining indoor air quality and enhancing the efficiency of the dryer.

In addition to providing safety, having a backdraft damper can also help in reducing energy loss by preventing conditioned air from escaping the home. Overall, the inclusion of a backdraft damper is crucial in ensuring that the dryer functions effectively and safely.