Allied Moulded 9350-FANVB Fibe...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$40.90
Allied Moulded 9350-FANVB Fiberglass New Work Ceiling Fan/Fixture Support Box

Allied Moulded 9350-FANVB Fiberglass New Work Ceiling Fan/Fixture Support Box

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Model: 9350-FANVB

In Stock (leaves warehouse same day if ordered before 3pm ET)

$40.90
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Allied Moulded 9350-FANVB Fiberglass New Work Ceiling Fan/Fixture Support Box

The Allied Moulded 9350-FANVB is a New Work Ceiling Fan/Fixture Support Box built from Fiberglass Reinforced Polyester BMC, part of the Allied Moulded FiberglassBox™ line. Sized at 4-Inch x 2.4375-Inch with a 22.5-Cubic-Inch interior volume, this box is engineered to safely support ceiling fans and light fixtures during new construction installations. It features a vapor seal design to help maintain a tight barrier against moisture intrusion, making it a dependable choice for professional electricians and contractors who need a non-metallic, corrosion-resistant support box for overhead fixture mounting.

Key Features

  • Compact Dimensions: 4-Inch x 2.4375-Inch footprint sized for standard new-work ceiling fan and fixture installations.
  • Generous Interior Volume: 22.5-Cubic-Inch capacity provides ample room for wiring connections and fixture hardware.
  • Durable Construction: Molded from Fiberglass Reinforced Polyester BMC for a non-metallic, corrosion-resistant, and impact-resistant support box that will not rust or corrode like traditional metal boxes.
  • New Work Configuration: Designed for installation in new construction applications where the box is mounted before finished ceiling material is installed.
  • Fan/Fixture Support Rated: Purpose-built to support the weight and mounting demands of ceiling fans and light fixtures.
  • Vapor Seal Design: Integrated vapor seal helps limit moisture and air infiltration around the box for a cleaner, more controlled installation.
  • FiberglassBox™ Series: Part of Allied Moulded's established FiberglassBox™ product family of fiberglass-reinforced electrical boxes.

Technical Specifications

  • Size: 4-Inch x 2.4375-Inch
  • Volume: 22.5-Cubic-Inch
  • Material: Fiberglass Reinforced Polyester BMC
  • Configuration: New Work
  • Design Feature: Vapor Seal
  • Series: FiberglassBox™

Typical Applications

  • Ceiling Fan Support in New Construction
  • Light Fixture Mounting and Support
  • Residential and Light Commercial Ceiling Installations
  • Applications Requiring Corrosion-Resistant, Non-Metallic Boxes
  • New Work Electrical Rough-In

Why Allied Moulded?

Allied Moulded's FiberglassBox™ line combines Fiberglass Reinforced Polyester BMC construction with purpose-built designs like the vapor-sealed 9350-FANVB to give electricians a lightweight, corrosion-resistant alternative to traditional metal support boxes. Built for new work ceiling fan and fixture installations, this box delivers the strength and interior capacity contractors need while providing a moisture-resistant seal for a cleaner, longer-lasting installation.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
ALM-20260924
Product Type:
Ceiling Fan/Fixture Support Box
Configuration:
New Work
Series:
FiberglassBox
Department:
Electrical
Product Group:
Boxes & Enclosures
Product Subgroup:
Electrical Boxes
Product Material:
Fiberglass Reinforced Polyester

Allied Moulded 9350-FANVB – Frequently Asked Questions

1) Can the Allied Moulded 9350-FANVB actually hold a ceiling fan, or is it just a fixture box?
The 9350-FANVB is a ceiling fan/fixture support box, built to carry the weight and mounting load of a ceiling fan as well as a light fixture. That is the difference between it and an ordinary round ceiling box, which is only rated to carry a luminaire. If you are hanging a fan, you need a fan-rated box like this one rather than retrofitting a standard box with a fixture strap.
2) Is the 9350-FANVB a new work or old work ceiling fan box?
New work. The 9350-FANVB is meant to go in during rough-in, mounted before the drywall or finished ceiling material goes up. If the ceiling is already closed and you are cutting into finished drywall, this is the wrong configuration for you, and you want an old work (remodel) fan-rated box instead.
3) What size and volume is the Allied Moulded 9350-FANVB ceiling box?
It measures 4 x 2.4375 inches with a 22.5 cubic inch interior. That volume matters more than the footprint on most jobs, since box fill is what decides how many conductors, clamps, and fixture studs you can legally pack in behind a fan canopy. A 22.5 cubic inch box gives you real working room for the fan leads plus a switch loop or a feed-through.
4) What does the vapor seal on the 9350-FANVB do, and do I still need to air-seal around it?
The VB in 9350-FANVB is the vapor seal version. The integrated seal limits moisture and air infiltration around the box, which is what building inspectors look for when a ceiling box penetrates an insulated attic floor or a vaulted ceiling assembly. It handles the box itself; the cable entries and the surrounding ceiling plane are still your responsibility under whatever air-barrier detail the job specifies.
5) Is a fiberglass ceiling fan box as strong as a metal one?
The 9350-FANVB is molded from fiberglass reinforced polyester BMC, which is an impact-resistant, non-metallic compound that will not rust or corrode the way a steel box does in a damp attic, a garage ceiling, or a coastal build. It is also lighter to handle overhead during rough-in. Unlike metal, it is non-conductive, so there is no box to bond, though your equipment grounding conductor still has to land on the fixture per the usual rules.
6) I'm a property manager standardizing ceiling fan boxes across a multi-family build. Is the 9350-FANVB a fit?
For new construction it works well as a single standard: one part number covers both fan and fixture locations, so your electrician can rough in every ceiling opening the same way and decide later which units get fans. The fiberglass body will not corrode in unconditioned attic space, and the vapor seal version keeps the ceiling air barrier intact in units built to tighter envelope specs. It only covers new work, though, so any turnover or retrofit work in existing units needs a remodel-style fan box.
7) What is the exact manufacturer part number for this Allied Moulded fan box?
The manufacturer part number is 9350-FANVB, from Allied Moulded's FiberglassBox line. Watch the suffix when you order: the FANVB designation is the fan-rated, vapor-seal version, and Allied uses closely related numbers across the family for non-vapor-seal and non-fan-rated variants.
8) Where can I get the spec sheet for the Allied Moulded 9350-FANVB?
Allied Moulded publishes a PDF spec sheet for the 9350-FANVB that covers the box detail beyond the 4 x 2.4375 inch size and 22.5 cubic inch volume. It is worth pulling before you submit on a job where the engineer has called out a specific fan support box.
How fast can I get the Allied Moulded 9350-FANVB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Allied Moulded 9350-FANVB come with a warranty?
Absolutely. The Allied Moulded 9350-FANVB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Allied Moulded 9350-FANVB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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