Replacement crank handle knob for manually opening and closing a compatible Ventline roof vent lid, restoring smooth operation when the original knob is broken or missing.
The Ventline BVD0421-00 is a genuine replacement lift arm knob, restoring the ability to manually open and close a compatible Ventline roof vent lid. This is the crank-style operator knob that turns the vent's lift arm mechanism, not an electronic fan speed control. It's constructed from durable black plastic and includes the mounting screw needed for installation.
This knob operates the mechanical lift arm that opens and closes the roof vent lid; it does not control fan speed or power. If a fan switch or speed control needs replacing instead, that's a separate part.
Check the manufacturer's recommendations or compare against the existing knob to ensure a proper fit before ordering.
• (1) Ventline BVD0421-00 plastic knob • Mounting screw
Covered by Ventline's Limited 90 Day Warranty.