Joist Mounting Vapor Box with Adjustable Steel Bracket for Fans and Fixtures

This non-metallic vapor box by Arlington Industries is designed for secure joist mounting of fans or fixtures in new construction. It features an adjustable plated steel bracket that fits joists spaced from 16 to 24 inches on center, enabling precise positioning along the bracket. The box includes a built-in flange with gasket material that forms a protective barrier against air infiltration, helping electrical distributors and lighting solutions providers meet residential energy codes. It is suitable for installations with double drywall and comes with captive fan/fixture bracket installation screws and an installed NM cable connector with gasket material. This product supports UL and CSA ratings for fan and fixture load capacities.

Specifications

• Manufacturer: Arlington Industries
• Manufacturer Part #: FBR425F
• Product Weight: 9.85 lbs
• Color: Black
• Material: Plastic
• Width: 6.250 inches
• Height: 3.408 inches
• Country of Origin: United States
• Made in USA: Yes
• UL Fan Rating: 70 lbs at 24" o.c., 110 lbs at 16" o.c.
• UL Fixture Rating: 90 lbs at 24" o.c., 150 lbs at 16" o.c.
• CSA Rating: 50 lbs fan/fixture at 16"-24" o.c.
• Compatible Joist Spacing: 16" to 24" on center
• Installation: Joist mount with supplied screws
• Fire Rating: 2-hour fire rating

Features

• Non-metallic, non-conductive plastic box with fully adjustable steel bracket
• Built-in flange with gasket material attached to prevent air infiltration
• Captive fan/fixture bracket installation screws included
• Installed NM cable connector with gasket material
• Fast and secure installation directly to wood or steel joists
• Allows flush ceiling installations in new construction
• UL and CSA listed for safety and performance
• Meets residential codes requiring vapor barrier protection

Downloads & Links

• Specification Sheet
• Catalog Page
• FBR425F Line Drawing