The Everlock™ self-locking damper handle eliminates the need for any tools to unlock a damper handle, adjust the airflow, and lock it back into position. According to the manufacturer, it is designed ...

Stackable damper blades are available. Specially designed for neat and easy storage, the ability to stack the damper blades helps save valuable space in a warehouse and cuts down shipping costs by ...

Dear Jim: We have central air conditioning, but have a problem keeping all the rooms evenly cool. Someone is always too hot or too cool. What are some simple methods to balance the temperatures ...