Master Flow Sgm20 Power Vent Automatic Shutter

The Master Flow automatic shutter opens only when the power vent is operating moving the air. When the power vent is off, the closed shutter helps prevent infiltration of rain, snow, insects, etc. The moving air opens the louvers only when the power vent is operating. This shutter has a maintenance-free white aluminium construction which can be painted if desired. Use with most of attic power gable mount vents. It measures 19 1/4″ x 19 1/4″ and always have a balanced ventilation system. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation.

Order Processing: After your payment is authorized and verified, we will start processing your order and this process can take from 1 to 2 business days, so please be patient with us. If we are unable to process your order due to inaccurate or incomplete payment or incorrect address information, your order processing may be delayed.

Carrier: UPS/FedEx/USPS. Delivery Timescale: More than 90% of orders arrive in 10 business days after despatch.

FREE RETURNS on all orders!
The following conditions must be met:

1. Items must be returned within 30 days after the purchase date.
2. Items must be unworn, undamaged and in original packaging.