I agree with Roger, as I just installed one of these last week with several remote switch locations.
This is a simple two-wire hook up. At each switch/timer location, you have a power wire in and a traveler out (back to the fan). When any one of these switches/timers is closed, the fan activates. You can have infinate single pole/single throw switches/timers installed in parallel on the circuit.
Good Luck!
