The manual I have states "Do not use GFI" and it shows the unit mounted inside the vanity IN the bathroom. GFI is required for 120VAC receptacles in the bathroom but this is a 240VAC device. e57, I don't see a conflict in the units you cited. The one that requires GFI is a 120VAC unit, the one that specifies NO GFI is a 240VAC unit.
