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Construction Metals TW144, TW144-1/8 Operating instructions

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The opening should be at least 1 inch smaller than the vent size. 1. Remove old vent and any loose debris from opening.
2. Apply a bead of sealant to the vent ange or wall. 3. Using the partial punched corner fastener guides (4 per vent),
fasten vent with nails or screws.
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CAUTION! Working above grade is inherently dangerous, be sure that proper fall protection measures
are in place. When working with power tools, gloves and eye protection are absolutely required.
INSTALLATION GUIDELINES
TWO-WAY VENT #TW144
These installation guidelines are for use with typical or standard applications. It is always recommended to seek advice from a licensed professional, and to
check with your local building inspector or building permit office for approvals and possible variations that may apply.
TW144
Size: 15 in. x 4.5 in.
N.F.V.: 33 Sq. In.
Opening: 13.75 in. x 3.25 in.
TW146
Size: 15 in. x 6.5 in.
N.F.V.: 52 Sq. In.
Opening: 13.75 in. x 5.25 in.
TW148
Size: 15 in. x 8.5 in.
N.F.V.: 71 Sq. In.
Opening: 13.75 in. x 7.25 in.
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