Know more about it here. Then, how much do fans weigh?
between 8 and 50 pounds
Beside above, how do I know if my junction box is rated for a fan? If those screws do, in fact, extend into the back of the box, it is fan rated. Now, make sure it has at least two large head screws fastened into a framing member above it. It looks as if there are, as the grounding wire is encircling one. Caulk, fan rated boxes don't come with any threaded rods.
Also to know is, can you hang from a ceiling fan?
Ceiling Fan Overview However—and this is very important—you can't just hang the fan from the existing electrical box. It's simply not strong enough to support the added weight and vibration of a fan.
How much weight can a ceiling fan box hold?
All ceiling boxes are required to support at least 50 pounds (NEC 314.27(A)), so you can assume the box will be able to support a simple light fixture. Boxes that are designed to support ceiling fans must be labeled as such, and must have a label listing the weight it can support if over 35 pounds (NEC 314.27(D)).
