The R50 is an innovative design in whole house cooling. The system is engineered to efficiently reduce the indoor temperature of your home by introducing cooler outside air. Install the whole house fan and enjoy the comfort and benefit of a well ventilated home while reducing your energy costs and your carbon footprint. Features . R50 Insulated Two Speed 1 100 1 600 CFM. Radio Frequency Remote Controlled Whole House Fan.. Doors seal tight when not in use.. Includes Interior ceiling grille and a 6 ft. power cord.. Energy Efficient. Easy Installation. No Maintenance. Fits 16 in. or 24 in. On Center Joists. No Joist Cutting Necessary. Low Profile. Dimension - 34 x 11 x 22 in.. Item Weight - 40 lbs.