Features:

• The Quiet Cool Energy Saver Classic Line features our patented, self-contained duct system that hangs in the attic to help neutralize the sound and noise vibration heard in the home
• The included damper system features barometric pressurized gravity dampers that insure there will be not heat/cooling loss between the home and attic.
• All Quiet Cool energy saver classic line fans include our ultra-high efficiency electronically commutated ac/dc brushless motors
• 4504 cfm
• Covers up to 2250 square feet

Product Description
The Energy Saver Classic line of Quiet Cool Advanced Whole House Fans was first introduced in 2011 and was a breakthrough in the whole house fan industry. With energy consumption as low as 61 watts, the Quiet Cool Energy Saver Classic Line will help you save up to 50-90% off your A/C related energy costs.

Here is some additional information about Quietcool Whole House Fan. Mounting Location: Ceiling, Housing Material: Steel, Number Of Blades: 3. This item has been restricted from sale in the following state(s): ['AS, GU, HI, PR, VI']

When it's hot outside, there is nothing better than coming home to your air-conditioned household. Keep your entire home cool with the QC ES-4700 Whole House Fan System from QuietCool. The QC ES-4700 advanced whole house fan is a new take on the idea of whole house ventilation. Whole house ventilation allows you to bring the cooler outdoor air through your windows, home and attic space to thoroughly cool and ventilate both the home and attic. QuietCool utilizes a unique design that uses an acoustical duct attached to an R5 damper box. The result is almost zero noise vibration and whisper quiet operation. The QC ES-4700 uses the ECM energy saver motor that uses hardly any power while moving extreme amounts of air. The QuietCool QC ES-4700 is designed to be installed centrally in large homes. Simply open a window when you get home from work, flip on the QuietCool and enjoy a peaceful and cool evening relaxing. HVI-916 airflow rate for California: 3080 CFM 5.89 square feet of net free attic venting required for proper ventilation Moves air at a rate of 4415 CFM on high and 3402 CFM on low 551-Watt ECM motor on high and 415-Watts on low ensures efficient operation and airflow Fan motor head hangs from the rafters in the attic with a small ceiling cut-out for the air intake grille Installation is simple with a typical 1 to 2-hour install time with no framing or joist-cutting required (fits 16 or 24 on-center)...