Types of Dryer Vents

If you're installing or replacing a dryer, it's a good time to review the available types of dryer vents. According to the U.S. Consumer Product Safety Commission, over 15,000 fires are started each year by faulty clothes dryer venting. Improper venting causes flammable lint to collect, reducing dryer efficiency and creating a fire hazard in your home.

Basic Types of Dryer Vents
Dryer vents come in two basic styles: roof mounted and wall mounted. A roof-mounted vent can result in a straighter exhaust pipe run, but this arrangement forces your dryer to work against gravity to get its job done. Roof mounted dryer vents also must be carefully designed to avoid leaks and animal intrusion. Wall mounted dryer vents can be placed much closer to the dryer, resulting in shorter, more efficient pipe runs. Wall mounted dryer vents can be difficult to install in masonry or concrete walls, however.

Indoor dryer vents are a third type of vent, but they should be avoided at all costs. Indoor dryer vents release huge volumes of moist air into your home, which could lead to condensation and mold. Indoor dryer vents also allow flammable lint to collect on the inside of your home.

Important Dryer Vent Features
As you shop for a dryer vent, here are some important features to compare:

• Bigger is better. The dryer vent exhaust port should feature an opening of at least 16 square inches. This size vent will allow exhaust air to flow freely out of the vent. Look for a dryer vent with an exhaust port of at least 4 inches in diameter.
• How many doors? Dryer vents are available in single flap or louvered multi-flap designs. Single flap models are better at staying closed when not in use, but multi-flap designs create less air resistance while in use.
• Keep out! Look for a dryer vent that includes a damper mechanism. A damper will keep the vent door closed tight when the dryer isn't running. This will keep cold air and insects from making their way down the dryer exhaust pipe.