Centaur 4" Round Fan Support B...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$86.02
Centaur 4" Round Fan Support Box - 1/2" Deep Pack of 12 Units

Centaur 4" Round Fan Support Box - 1/2" Deep Pack of 12 Units

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Model: CM-FS4PB

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

$86.02
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The CM-FS4PB 4" Round Fan Support Box is designed for in-ceiling mounting in dry locations. This steel, non-insulated ceiling box has a cubic capacity of 5.8 cubic inches and measures 4 inches in length and width, with a depth of 0.5 inches. Weighing 0.43 pounds, it features multiple knockouts for cable entry and is UL standard compliant. Ideal for supporting ceiling fans, this drawn construction box includes one outlet.

Variant SKU Length Width Depth Height Diameter Cu In Weight
CM-FS4PB 4 Inches 4 Inches 0.5 inches - - 5.8 0.43 Pounds
CM-FS4PB-NBH 4 Inches 24 Inches 0.5 inches 4 Inches 4 Inches 5.8 2.1 Pounds

Manufacturer Resources

See Spec Sheet

Product Specs

Box Shape:
Round
Location Rating:
Dry Location
Product Type:
Fan Support Box
Special Features:
Ultra Shallow Profile
Application:
Supporting ceiling fans in shallow or limited-depth ceilings
Mounting Feature:
Ceiling / New Work Bar Hanger
Product Group:
Electrical Boxes
Product Subgroup:
Junction Boxes
Department:
Electrical
Product Depth:
0.5 inches
Package Quantity:
12

Centaur CM-FS4PB – Frequently Asked Questions

1) What's the difference between the flush mount and bar hanger versions of the Centaur 4 inch fan support box?
Two mounting options on the CM-FS4PB. The flush mount version is the bare box, which you fasten to existing structure, typical for remodel or where you already have blocking. The New Construction Bar Hanger version comes with a bar hanger that spans between joists, so you can position the fan location anywhere along the bar before the ceiling goes up. Same 4 inch round box and same 5.8 cubic inch capacity either way.
2) Can I use this fan box in a bathroom, on a covered porch, or anywhere damp?
No. The Centaur CM-FS4PB round fan support box is rated for dry locations only. For a covered patio, a bathroom over a tub or shower, or any damp or wet location, you need a box carrying the corresponding damp or wet location listing instead.
3) Does the Centaur CM-FS4PB come with knockouts for cable, or do I have to punch my own?
Knockouts are already there. The box is drawn steel, non-insulated, with multiple knockouts for cable entry and one outlet, and it's built to UL standard compliance per the manufacturer data. Overall footprint is 4 by 4 inches with a 0.5 inch depth.
4) Is 5.8 cubic inches enough box fill for a ceiling fan hookup?
It's tight, and that's the number to design to. At 5.8 cubic inches the CM-FS4PB suits a simple fan feed with a small conductor count. If you're landing a feed plus a switch leg plus a separate light leg and grounds, run the box fill calculation before you commit, because a shallow drawn box gives you no room to fudge it.
5) How many Centaur CM-FS4PB fan boxes come in a pack?
They ship 12 to a pack. If you're standardizing fan boxes across a multi-family or hospitality retrofit, that's the unit to order against your door-by-door count.
6) Is the Centaur 4 inch fan support box round or square?
Round box, in a 4 inch size, of the fan support type rather than a plain junction box. The listed outside measurements are 4 by 4 inches with a 0.5 inch depth, which is the square envelope around a 4 inch round body.
7) Where can I get the full spec sheet for the Centaur CM-FS4PB fan box?
Centaur publishes a datasheet for the CM-FS4PB, and ZenSupply hosts it at zensupply.com/content/pdf/tamco/centaur_datasheet_1128082.pdf. Go there for the manufacturer's own dimensional and listing detail if your inspector wants documentation on file.
How fast can I get the Centaur CM-FS4PB 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 Centaur CM-FS4PB come with a warranty?
Absolutely. The Centaur CM-FS4PB 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 Centaur CM-FS4PB?
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 Centaur CM-FS4PB from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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