Assemble and hang the swing. There may be differences in assembly procedures depending on the style and brand you select. Read and follow the manufacturer's instructions, as well as any safety precautions, for assembly and hanging. Hang the swing from eye bolts mounted to the ceiling joists.Remove the lights. Take down the lights and remove the old boxes. The old boxes are not suitable for ceiling fans. There are two basic types of ceiling fan boxes. One is the saddle box, for fans that are centered on a ceiling joist. The other option is a fan bracket that spans between two ceiling joists and has a metal box bolted to it.
Install the fan boxes. If it's a saddle box, screw the box to the ceiling joist thru the holes in the bottom. If it's a bracket, insert the bracket into the hole in the ceiling, and tighten the bracket against the ceiling joists using a wrench. Then, bolt the box into place.
Assemble and hang the fans, making certain to follow the manufacturer's instructions and any safety precautions.