Instructions / Assembly

Ventamatic, Ltd. | P.O. Box 728, Mineral Wells, TX 76068 ▪ Phone: [phone] ▪ www.MYMAXXAIR.com
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Step 5: Facing Installation
• Use 2 X 6 boards to create a square with the inside dimensions being the same distance as the shortest
dimension of the shutter rough opening (i.e. 26” for a 24-in model, etc.).
• Nail or screw in the facing to the framed opening.
TIP: If doing a joist-out installation, use lumber from the support pieces as the long cuts and the removed joists as the
short cuts.
TIP: For a quieter fan, build a second box frame the same size as the fan frame and install it between the frame and
facing. Ensure that there is still a minimum of 36” clearance between the fan blades and attic roof.
Step 6: Prepare and Install Fan Assembly
Belt Drive Models
• Remove hardware and remount the motor on
the top side of the struts.
• Position fan belt on the pulleys and adjust it to
fit snugly with about 1/2” deflection. DO NOT
OVERTIGHTEN THE BELT!
• Tighten fan blade set screw and make sure the
hub of the fan blade assembly is facing up
towards the roof.
Direct Drive Models
• Remove fan blade and wire the motor first.
• Replace and secure the blade so it is about
half-in and half-out of the hub.
• Tighten fan blade set screw before operating
and make sure the hub of the fan blade
assembly is facing up towards the roof.
Joist-In Installation
Joist-Out Installation