First of all, Air Cycler has THE BEST customer service we've even seen! I sent an email during the Christmas holiday when they were closed but got an almost instant response from Betsey helping me troubleshoot our older FR model unit. We found the g1 model can directly plug into the older bracket making it an easy replacement. Got the g1, pulled out the FR, plugged the g1 in and it started working flawlessly!! Thanks so much!