Madison Electric MSBFAN Smart Box Ceiling Fan Box

Product Description

The MADISON ELECTRIC MSBFAN is a 4-inch ceiling box designed for mounting ceiling fans, light fixtures, and smoke or carbon monoxide detectors in residential settings. It is UL listed to support paddle fans up to 50 pounds and light fixtures up to 75 pounds, making it suitable for combination fan-and-light installations. The box mounts to a side beam using three 2-inch No. 10 hex head screws. Its extra-deep profile accommodates the wiring and mounting hardware typical of paddle fan assemblies. Nylon locking nuts are included for secure fan attachment. Electricians and qualified installers use this box for old-work and retrofit projects where a new ceiling-mounted outlet box is needed without full ceiling demolition.

The MSBFAN is well suited for residential retrofit applications where an existing light fixture is being upgraded to a ceiling fan or fan-and-light combination. Its side-beam mounting design makes it practical in finished ceilings where access is limited to the space between joists. The box handles both static and dynamic loads, qualifying it for moving-load applications per its UL listing. It is appropriate for standard residential branch-circuit wiring scenarios in single-family and multifamily dwelling units.

Key Features

• UL listed for 50-pound paddle fan support and 75-pound light fixture support
• Side beam mounting with three 2-inch No. 10 hex head screws — no additional hardware required
• Extra-deep box profile accommodates paddle fan wiring and mounting components
• Nylon locking nuts included for positive, vibration-resistant fan attachment
• Designed for old-work and retrofit installations in finished ceilings
• Supports moving loads, meeting requirements for fan-rated ceiling boxes

Compatibility

Designed as an OEM-style replacement or upgrade box for residential ceiling fan, light fixture, and smoke or carbon monoxide detector installations requiring a fan-rated ceiling outlet box in old-work or retrofit conditions.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Turn off and verify the absence of voltage at the circuit breaker before beginning any work on the ceiling outlet box or associated wiring. Confirm that the mounting beam provides adequate structural support before fastening the box with the supplied hex head screws. Do not exceed the rated load limits of 50 pounds for paddle fans or 75 pounds for light fixtures.

Technical Specifications

• Fan Load Rating: 50 pounds
• Light Fixture Load Rating: 75 pounds
• Mounting Fasteners: Three 2-inch No. 10 hex head screws
• Box Size: 4 inches
• Weight: 0.678 pounds
• Listing: UL Listed
• Application: Old work and retrofit
• Unit of Measure: Each

Standard Information

• Brand: MADISON ELECTRIC
• Manufacturer Part Number: MSBFAN