One more point. I suggest reversing the 30 and 87 connections. Some will jump on me and insist that 30 should always be +, but no. The reason I like to reverse the + is that when using a switchover relay, 87a will be powered when the fan is off if you wire it 'correctly'. If you wire it backwards as I suggest, it will work normally, but 87a will always be cold, so one less opportunity for a mysterious short.