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that is presuming the circuit is a 15 amp circuit. If a 20 amp circuit, you must use #12 wire.Thread 14/3 wire from room up into fan box hole, passing through fan box into the attic
wiring the switches before installing the boxes? reverse order11. Replace old switch w/ new switches (wire power to new switches)
12. Replace old gang box with double-gang box
if this is near an scuttle hole, you must use runner boards on both sides of the cable to protect it.In attic, secure wire to joists using cable straps
21. balance fan
yes. just make sure any box you use is "fan rated" so it will be rated to support the fan.What if the center of the room is on a joist? Are there fan boxes specifically for attaching directly to a joist?
there are some really odd boxes out there that will allow you center the fan even in this situation but realize, you won't be off more than a couple inches if you just move the fan over to the edge of the joist. Depending on how the room is laid out, it is usually not even notceableWhat if the center of the room is only partially on a joist? Would the fan just have to be slightly off the center of the room, then?
it sounds like you the process understood well.