As part of a home renovation project I discarded my old ceiling fan and have bought a new one. When installing the new one the electrician tells me that I have a 3" junction box and that I'll need a 4" junction box to install the fan. Now, this is a Manhattan high rise and getting to make any changes to the concrete ceiling would be impossible (to replace the 3" junction with a 4" junction).
Can someone advise me of a workaround or perhaps a fan that will work with a 3" junction box?