Centaur 4" Round Deep Fan Supp...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$64.28
Centaur 4" Round Deep Fan Support Box – 2-1/8" Deep with FB Side Mount Bracket (per 4)

Centaur 4" Round Deep Fan Support Box – 2-1/8" Deep with FB Side Mount Bracket (per 4)

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Model: CM-FSDB-FB

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

$64.28
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The Centaur CM-FSDB-FB-4 is a 4" round, fan-rated support box designed with a deep 2-1/8" profile to accommodate larger wiring and heavier fixtures. It features an FB side mount bracket for secure and convenient installation in ceiling applications. Made of durable non-metallic material, this box is ideal for residential and commercial new work installations requiring high-strength fan support.

Manufacturer Resources

See Spec Sheet

Product Specs

Box Type:
Round Fan Box
Fan Rated:
Yes
Mounting Style:
FB Side Mount
Product Size:
4 inches
Product Length:
4 in
Product Diameter:
4 in
Product Height:
4 in
Product Material:
Non-Metallic
Product Weight:
1.08 lb
Product Width:
4 in
Product Depth:
2.125 in

F4P CM-FSDB-FB – Frequently Asked Questions

1) Can I hang a ceiling fan directly from the Centaur CM-FSDB-FB round box, or do I still need a separate fan brace?
The Centaur CM-FSDB-FB is a fan-rated box, so a ceiling fan mounts directly to it. Support comes from its FB side mount bracket, which fastens to the side of a joist rather than spanning between joists. If your fan location falls between joists with no framing to catch, you need an expanding brace bar instead, because this box has to land against solid framing.
2) Is this Centaur fan box for new construction or can I use it in a finished ceiling?
It is a new work box. The FB side mount bracket nails or screws to the face of an exposed joist before the drywall goes up, so the framing has to be open. Retrofitting into a closed ceiling calls for an old work fan box with a saddle or brace bar, not this one.
3) Is a 2-1/8 inch deep 4 inch round box enough room for fan wiring and a splice?
Depth is 2-1/8 inches on a 4 inch round body, which is the deep version rather than a shallow pancake. That extra depth is there to take fan leads, the supply cable and wire connectors without the fan canopy fighting the splice, and it also gives room for a heavier fixture's mounting hardware.
4) Is the Centaur CM-FSDB-FB metal or plastic, and does that affect grounding?
The body is non-metallic. A non-metallic box does not serve as a grounding path, so the equipment ground has to be carried through on the wire and joined to the fan's ground lead in the box. It also means no bonding screw in the can itself.
5) Will a standard ceiling fan canopy cover a 4 inch round box?
The opening is a 4 inch round, the common size fan canopies and round fixture plates are built to conceal. The box measures 4 inches across by 2-1/8 inches deep, so the whole body sits above the drywall line with only the rim showing.
6) How many Centaur CM-FSDB-FB fan boxes come in a pack?
They ship four to a pack under model CM-FSDB-FB, which suits a multi-unit or tract job where several bedrooms get fan boxes at once. Each box weighs 1.08 lb.
7) Can I use this fan box on a commercial job or is it residential only?
Both. The CM-FSDB-FB is put up for residential and commercial new work where a high-strength fan support is required, so it is equally at home in an apartment build-out or a hotel guest room ceiling.
8) Where do I find the full spec sheet for the Centaur CM-FSDB-FB fan box?
Centaur publishes a datasheet for this box, hosted at zensupply.com/content/pdf/tamco/centaur_datasheet_1128089.pdf. Useful if your inspector wants documentation on the fan rating before rough-in sign-off.
How fast can I get the F4P CM-FSDB-FB 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 F4P CM-FSDB-FB come with a warranty?
Absolutely. The F4P CM-FSDB-FB 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 F4P CM-FSDB-FB?
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
Why buy the F4P CM-FSDB-FB from ZenSupply?
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