You have to be careful putting maxx air on the powered vent cover if you have one (The one remotely operated from the wall). Some do not allow the vent to open all the way and will bind the motor. The covers made for the fantastic vent will allow it to fully open. We have 2 fantastic fans as well, one in the bath with the manual opening knob, and the one in the kitchen is controled from the wall unit. We put the Maxx Air II on all but the one with the remote.
All vent covers will fit, not all will allow full opening of an automatic / powered lid. I opted not to put a cover over the powered lid as the fantastic covers require removing the dicor sealant and utilizing the vent flange screws.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.