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 reducing shipping volume. The Everlock™ (patent pending) is a self-locking damper (quadrant) handle. It is designed for use with both 1.5- and 2-inch standoff applications. The damper handle is fully hand-operational so that there are no tools needed for adjusting or readjusting the damper blade position on site. To adjust, press the thumb trigger and slide the handle into the desired position. Release the thumb trigger and the spring-activated lock clicks into place. To readjust, press the thumb trigger again and change the position as desired. According to the manufacturer, the Everlock™ makes sure that a balanced airflow system stays balanced for good.
Rossi HVAC Hardware, 818-252-3811; 818-252-3812 (fax); firstname.lastname@example.org; www.rossihardware.com