Master Flow

Buying Guide: Master Flow Ventilation Products

Wall Louvers and Undereave Vents
Master Flow wall louvers are one-piece units that snap into a cut opening for intake or exhaust venting, and they suit flush or recessed installation. Undereave vents mount at the soffit with pre-punched nail holes, and some styles include a poly mesh screen to deter animals, birds and insects.

Foundation and Roof Vents
Master Flow foundation vents help remove moisture from the crawl space area, and matching covers help lower the risk of frozen pipes while keeping out debris and rodents. The resin roof vent has a fully enclosed hood that deters rodents and insects and resists clogging from leaves and pine needles.

Frequently Asked Questions

What does Master Flow make?
Master Flow makes wall louvers, undereave vents, foundation vents and foundation vent covers, a resin roof vent, and zinc roof flashing for moss prevention. Finishes include white, black, brown, silver and mill aluminum.

How do I choose the right size or type?
Match the height, width and length on your old vent, or measure the opening you plan to cut before ordering. Check the part number on the old part, and check your building or equipment manual for placement.

Where does the zinc roof flashing go?
The zinc moss preventer installs near the roof ridge and can be used with composite, shake or tile roofs. It can be nailed or glued in place, and you should follow the manufacturer's instructions.