Automatic 20 in. Power Gable Vent Shutter. Power Gable Wall Louver designed to be used with MasterFlow PG2 and PG3 Gable Power Fans.
- Use with all attic power gable mount vents
- Moving air opens the louvers only when the power vent is operating
- When vent is off, shutter helps prevent infiltration of rain, snow, insects, etc
- Maintenance-free white aluminum construction (can be painted)