About Master Flow™ Roof Louver RT65 Plastic Square‑Top

This plastic square-top utility vent is manufactured with UV-resistant polymer and includes pre-drilled nail holes for easy installation.  Available in four popular colors, it provides 60 sq. in. (41,395 mm2) of NFA to help exhaust heat and moisture from the attic.

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