I have finally got my fan installed and have one more question. What size fuse is standard? A 20 amp blows on start up but a 25 amp does not. Should I stick with the 25 or go to a 30? Ihave cycled this thing about a dozen times on and off with the adjustable thermostat and all seems well. The specs says it will draw 11 amps running but not what size fuse to use. As usual, thanks for your answers.