MaxxAir Roof Vent Fans We Only Install the Best! MaxxAir Fans have proven themselves to be the leading manufacturer of roof top RV and trailer vent fans. They are sturdy, slim and effective. Learn More User Friendly We sell and install the 7500K model, which has a remote, 10 speed settings, exhaust and intake modes, an automatic switch to turn on, and can even be operated in the rain, while still keeping you dry! Creating the Best Fit We have 3D modeled and CNC cut our own trim fitting, to achieve a the best fit possible between the MaxxFan and your van roof. This allows for a more consistent waterproof seal around each vent fan.