Barometric Gravity Backdraft Damper - CBL

Barometric Gravity Backdraft Damper - CBL

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The CBL barometric gravity backdraft damper is designed for exhaust-fan applications in warehouses and large commercial or industrial spaces. Its horizontal blades move together in response to pressure from the exhaust fan, providing gravity-operated airflow control without manual blade adjustment.

Key Features:

• Gravity Operation: Simultaneously moving horizontal blades operate in response to exhaust-fan pressure.
• Blade Spacing: 3⅛” between horizontal blades.
• Material Options: Steel (CBLA) or aluminum (CBLL). The aluminum profiles are tempered for increased strength.
• Frame: L-frame construction with a foam seal. Contact us to confirm availability and dimensions if your installation requires a U-frame.
• Size Options: Listed rough-opening sizes, width × height, are 6” × 6”, 12” × 12”, 18” × 18”, 20” × 20”, 24” × 24”, 30” × 30”, 33” × 6”, 36” × 36”, 42” × 42”, 44” × 44”, 45” × 6”, and 48” × 48”. Custom sizes are available up to 60” × 48”. Confirm frame and overall dimensions before ordering.
• Finish Options: Baked electrostatic epoxy-polyester paint. White is the standard color; Metallic Gray and Black Matte are additional listed selections. Confirm project-specific color-match requirements before ordering.
• Availability and Lead Times: This product is not routinely stocked. Configurations are normally made to order, although limited quantities may occasionally be available from stock. Made-to-order configurations have an estimated production lead time of 3–4 weeks. Shipping transit time is additional. Select your size, finish, and material to view availability for your exact configuration.

No substitutions without approval: If your selected configuration is unavailable, we may contact you with an alternative. We will not substitute the size, material, frame configuration, or finish without your approval.

Choose the CBL for pressure-responsive, gravity-operated backdraft control in your exhaust installation.