Master Flow®

Plastic Soffit / Undereave Vent

Located at the lowest portion of the roof, these easy-to-install vents are a critical part of the attic ventilation system, allowing the flow of fresh air into your attic
Plastic Soffit / Undereave Vent
All-purpose intake ventilation
Oval snap-in design for easy installation with 5/16" (7.9 mm) soffit material
High-impact resin construction


12” x 4” (305 mm x 102 mm) high-impact plastic soffit/undereave vent provides 22 sq. in. of NFA to allow cool, fresh air to enter the attic. Oval snap-in design for easy installation with 5/16" soffit material.

Note: Always have a balanced ventilation system. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation.

Protect Your Investment

Find out about product warranties and options that may help protect your most valuable assets. 

  • 4 year Ltd. Warranty

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