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QuietCool QC-6400
QuietCool QC CL-6400 The QC-6400 is now known as the QC CL-6400. This whole house fan is the ideal fan to use in a central location like a hallway or in a large room.

Don't forget to add an electronic wall timer, remote system or switch.

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QuietCool qc cl-6400
QuietCool QC CL-6400
MSRP: $1,660.00 SALE PRICE: $1,499.00
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The QuietCool QC CL-6400 uses 2, 2 Speed Capable Motors For 4 Speed Operation! The QuietCool, QC-6400 is the largest dual motor, single grille fan on the market today. Yet despite the massive airflow generated by this fan, it quietly operates with both motors running at a comfortable sound level of 50 db.

This deluxe whole house fan is the big brother to our very popular Quiet Giant (QC-4500) fan that has been reliably cooling homes and saving energy across the country for several years. By using the patented QuietCool Fans you can slash your air conditioner related electricity costs by 50-90%* and these fans will pay for themselves faster than any other "green energy" product on the market today.

The QuietCool QC CL-6400 draws 6418 CFM (Cubic Feet per Minute) and is the perfect fan for homes with common areas up to 3200 square feet.

What's In The Box? When you purchase your QC CL-6400 fan from us, you get a complete system, which includes the dual motor fan, ducting, damper and grille. All that it needed for installation is your choice of controls. All of the "Classic Line" fans (except for the QC-1500) have the optional capability of having the motors being wired for two speeds. For two speed operation, your installer would need to simply remove the included 8' power cord and run a 3rd wire from the fan motor to the 3-wire wall switch and timer. If using a remote system or standard on/off wall switch, the fan will work perfectly as a single speed fan (as set in the factory). Consult with your electrician about wiring this 2 speed wiring option. This 2 speed option would actually make our dual motor QC-4500 and QC-6400 fans 4 speed capable because these fans have two motors per fan.

The ideal setup for automatic operation, is to have your electrician hardwire the fan to a wall timer and standard off/on or 3 way switch (if wired for 2 speed operation) mounted next to each other on the wall at a central location such as a common hallway. This allows you to turn the fans off based on the time set on the timer or put the timer on hold and use the multiple wall switches to operate your fans individually. This method of installation gives your the flexibility of operating one or more fans during cooler months when you may not want all of your fans running at the same time.

For those that plan on mounting the fan grille on a side wall instead of the ceiling, (often done on a room with a vaulted ceiling), you will need one optional wall adaptor per fan.


qc-6400 install
Image Of QC CL-6400 Installed In Attic

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Download The Classic Line Installation Guide(.pdf)
Download QuietCool Product Information Sheet (.pdf)
specification sheet QC CL-6400

QuietCool QC CL-6400 Specifications:

MSRP: $1,660.00 Motor Voltage 120 V. AC, 60 Hz 2 SPEED Capable
Energy Usage 658 Watts High Speed/329 Watts Low Speed
Air Flow 6,418 CFM High Speed/3,226 CFM Low Speed
CFM/Watt- Efficiency Rating 9.75 high 9.81 low
Square Foot Coverage @ 2 CFM per SQ FT - Covers up to 3,200 Square Feet
# of Speeds 2 Speed
Duct Diameter 16"
Duct Length 6 feet
Motor Head Diameter 16 1/2"
Motor Head Length 13 3/4"
Sound Level in Room "Acoustical" 50 db high / 43 low db
R Value at Closed Damper R 5.0
Dampers Air Tight Insulated Dampers
Controls Remote Control or Hard Wire Capabilties
Warranty 10 Years
Framing None Required Fits between "16 or 24" on Center Joists No Joist Cutting Necessary
Minimum Suggested Attic Venting 8.5 SQ FT net free area
Ceiling Rough Opening 14 1/4" X 36 1/4"
Ceiling Grill Outside Dimension 16" x 38"
Ceiling Grill Color White- High Volume Air Flow
Shipping Weight 87 Lbs.
Ship Carton Dimensions 39" x 20" x 38"
Ship Carton Cube 14.9
UL Component UL Listing Numbers Motor E62815; E62788; E62862 Power Cord E55178; E147323
RACO Handy Box & Cover E195978