Model SI-445

Galvannealed Steel Louver
4" Deep - 45 Degree J-Blade BD-Intake

The SI-445 combination louver features stationary louver blades and an integral gravity operated backdraft damper to protect intake air openings in exterior walls. The SI-445 is available in a wide array of painted finishes including custom color matching.

Standard Construction

Material: Galvannealed steel.
Frames: 4" deep x 20 ga. thick (102 x 1) channel.
Blades: 45^o x 20 ga. (1) thick J style BD intake.
Screen: 1/2" x 0.063" (12.7 x 1.6) expanded and flattened aluminum.
Mullion: Visible.
Minimum Size: 12" x 12" (305 x 305)
Maximum Size: Single Section: 36" x 96" (9144 x 2438)
                           Multiple Section: Unlimited

Ratings

Free Area: 7.5 ft² (0.70 m²)

Performance @ Beginning Point of Water Penetration
Free Area Velocity: 775 fpm (3.94 m/s)
Air Volume Delivered: 5813 cfm (2.75 m³/s)
Pressure Loss: 0.14 in. wg. (35 Pa)

Velocity @ 0.15 in. wg. Pressure Loss: 811 fpm (4.12 m/s)
Design Load: 30 psf