I have a 2009 831FKBSS and only have the Fantastick fan in the bathroom. This fan will move lots of air in the trailer and IMO, you will not need another fan. One of the great features of this trailer is the cross ventilation when you open the windows, and in conjunction with the BR vent fan, there will be lots of air moved within the trailer.
2008 Dodge Ram 4X4 Quad cab LB 2500 Cummins 6.7L TD / 2013 Columbus 320rs. Camped 50 days in 2015. RIP Angel the camping Cat, we will miss you.