Zonefirst SPRD-12 Damper Els PW 17895 which is a requirement for

which is a requirement for LP gas safety

ensuring a drop-in fit for older systems without requiring bracket modifications

including the LH33WZ515 and LH33WZ521

you will need to order a separate V-9999-608 packing kit

use a back-up wrench to secure the 5/16”-24 contact terminals to the specified 60 in-lbs torque to prevent internal hardware damage

Zonefirst SPRD-12 Damper Els PW 17895 which is a requirement forModern forced air zoning requires precise management of air velocity to prevent equipment damage and audible noise. The Zonefirst SPRD 12 is a professional grade 12 inch round barometric static pressure regulating damper designed to bypass excess supply air directly into the return plenum as individual zone dampers close. Built with a heavy duty 22 gauge galvanized steel shell, this single blade unit utilizes a counter balanced weighted arm to