MaxxFan, a new, one-of-a kind ventilator system that protects your RV interior always in any weather rain or shineA complete all in one system that fits standard 14 inch x 14 inchIncludes a powerful 3-speed fanEasy to remove interior insect screen, simply rotate four retaining knobs to remove for cleaning Maxxair MaxxFan Ventillation Fan with Smoke Lid and Manual Opening Keypad Control – MaxxFan, a new, one-of-a kind ventilator system that protects your RV interior always in any weather, rain or shine. A complete all in one system.