Replacing ceiling lights with ceiling fans
Find out if you can use the same hole for ceiling and ceiling fans
Can I Use the Same Hole for Ceiling Lights and Ceiling Fans?
Yes and No. When preparing to replace an ordinary ceiling light with a ceiling fan, you definitely CANNOT use the same electrical box for both, even though the space needed for the hole may be the same for both fixtures. The main reason for this is that the electrical box for a ceiling light may not be able to support the weight of the ceiling fan.
Reinforcing the electrical box of your current ceiling light fixture to accommodate the weight of your ceiling fan is easy; just put a piece of wood between two joists to reinforce the current box to hold the weight. Another option is to replace the electrical box of a ceiling light with one designed to support the weight and electrical current of ceiling fans. You can pick up a ceiling fan/heavy fixture installation brace and box from your nearest hardware store for about $10 to ensure that your ceiling fan will mount to the ceiling without fear of falling or electrical shorts.