The Model CTRF is a CEILING TRUSS flanged frame horizontal mount automatic exhaust shutter. It is designed to allow airflow in one direction and to prevent reverse airflow. The blades open with airflow and close by gravity when the fan shuts down. Ideal for use with whole house fans without cutting the trusses away. The shutter comes standard with a Polar White Enamel Finish and is flush mounted for a clean appearance.
Frame: 1-5/8" deep x 1-5/16" flange x .062 Extruded Aluminum.
Blades: 26 gauge 3105 Aluminum with spring assist to allow the blades to open quickly.
Seals: Felt on leading edge of blades for tight closure and quiet operation.
Tie Rod: Galvanized Steel for uniform opening and closing.
Bushings: 304 Stainless Steel pivot pins and bushings.
Construction: Staked corners.
Mounting holes: 3/16" diameter.
Finish: Polar White Enamel Finish.
1500 FPM Maximum Velocity.
1" wg Maximum Pressure.
180 degree Maximum Temperature.
Premium blade package available.
Custom sizes available in whole inch increments.
We recommend mounting the shutter at least 1/3 the fan diameter away from the fan blade.