QuietCool advanced whole house fans use and improve upon the principle of ventilation cooling with savings off traditional cooling methods such as A/C Designed to cool and ventilate small homes - up to 1541 sq. ft., while providing optimum performance. Moves air at a rate of 3081 CFM on high and 2020 CFM on low, ensuring rapid cooling and ventilation. 285-Watt ECM motor on high and 80.8-Watts on low ensures extremely energy efficient operation and superior airflow Damper box with R5 damper doors help insulate the home from the attic during colder seasons when the fan is not in use. Fan motor head hangs from the attic rafters with a small ceiling cut-out (14 in x 22 in) for the air intake grille, minimizing space requirements. Includes Wireless RF Control Kit with Glass Wireless Switch - up to 12 hour countdown timer Simple installation process with a typical 1 to 2-hour install time, no framing or joist-cutting required, fitting 16 or 24 on-center for added convenience. Included window locks to help ensure windows are secure when the fan is in operation, providing peace of mind and enhanced safety. Requires 4.11 sq. ft. of net free attic venting to ensure proper ventilation. The QuietCool QC ES-7000 RF Energy Saver Advanced Whole House Fan is an innovative solution that revolutionizes your home's ventilation and cooling system - now including the Wireless RF Control Kit pre-wired to a 20 foot power cord - ready to plug-and-play! Tailored for large homes, this fan covers areas up to 3,440 sqft. It delivers airflow rates of 6,878 CFM on high and 4,304 CFM on low, ensuring swift and efficient cooling and ventilation. With power consumption of only 727 Watts on high and 164 Watts on low, the ECM motor provides ultra energy-efficient operation and optimal airflow. Say farewell to traditional cooling methods like air conditioning, which can be costly due to increasing electricity prices. The QuietCool series of whole house fans utilizes cooler outdoor air to effectively cool and ventilate your home and attic, fostering a healthier indoor environment and significantly reducing energy usage. This can potentially save you up to 50 to 90% on your A/C-related electricity bills. Furthermore, QuietCool whole house fans significantly enhance indoor air quality by continuously exchanging stale indoor air with fresh outdoor air. Properly sized, the QuietCool ensures a complete air exchange every 3 to 4 minutes. What truly distinguishes the QuietCool QC ES-7000 RF is its patented design, featuring an acoustical duct connected to an R5 damper box. This innovative design minimizes noise and vibration, ensuring whisper-quiet operation even at maximum airflow. Bid farewell to disruptive fan noises and enjoy tranquil nights of undisturbed sleep, all while experiencing the refreshing breeze from the QuietCool whole house fan.