Changing an iron chandelier to a ceiling fan is a do-able option. You may need to change the electrical box to an approved fan box. In newer homes, using a fan box to hang a chandelier from is common practice. The difference between a fan box and a standard ceiling fixture box is how it mounts the framing and the size of the screws or studs it has to hang the fixture from. Fan boxes are rated for more weight than a standard box and have metal brackets that attach them to the studs or framing instead of just having a couple of nails. Additionally, the screws or studs will be at least #10 whereas a standard box will have holes for 8/32 screws.
Content Provided by: Julia Ritzenthaler