Browse Categories

Order By Calling or Order Online:
We Will Ship Your Fans Directly To Your Doorstep.

Need An Installer? Call 1-877-667-4663

How Do I Get My Fan Installed?

Installation is straightforward and simple. Ideally if you are handy you can install the fans yourself and have them wired by a licensed electrician or simply plug them in.  Normally any handyman, electrician or contractor can install a whole house fan.

How Do QuietCool Fans Work?

Because heat rises, the rooms upstairs and especially your attic is generally much hotter than the rest of your home.  This hot air acts like a heating blanket that keeps your entire home hot, even into the cool evening hours.

QuietCool Fans remove the hot and stale air from your entire home and replaces it with cool outside air.  The fans Quietly pull the cool air into the home through several opened windows.  As the air circulates, the fans suck the air up into your attic.  This creates a positive pressure in the attic causing the hot air to be pushed out your attic through the existing attic vents.  This continuous circulation of air not only cools your attic, but also cools your entire living space.  You can actually feet a cool breeze of air.

The motors and flexible ducting for the QuietCool Fans are installed in your attic space so the only thing visible from inside your home is an attractive, white ceiling grille and a switch & timer on the wall.  We recommend installing smaller fans (like the QC-1500, QC ES-1500, QC ES-2250 or the QC-2250) in each of your occupied bedrooms and a larger QuietCool fan in the hallway.  Yes, you can sleep with the QuietCools running on warm summer nights.

Utility companies report that the installation of a whole house fan can cut some air conditioning bills in half!

QuietCool Fans Are Truly Amazing! They Are Maintenance Free and Come With A 10 Year Warranty!

Order Your QuietCool Fans Today!

QC CL-6400 Whole House Fan Dual Motors, 4 Speed 6,020 CFM

QC CL-6400 fan
QC CL-6400 fanqc cl-6400 attic view
Price: $1,499.00
free shipping
The QC CL-6400 Whole House Fan aka "Quiet Giant" Is a 2 Speeds dual fan system that provides air Flow of Hi: 6020 CFM and Low: 3226 CFM 6,418.  The QuietCool QC CL-6400 uses a two motor, single grille design and is the most powerful QuietCool Fan On The Market!

Designed To Cool up to 3,000 square feet

This double motor fan uses two separate 2 Speed Motors For Optional 4 Speed Capability!

The QC CL-6400 features our cool blue powder coated motor housing, shorter motor heads, and an insulated damper box that boast an exceptional R Value of R-5 to prevent air from flowing back into the attic space when the fans are turned off.

4 Speed Capable Motor (2 Speeds per motor) - Requires removal of the attached power cord and a third wire run to a 3-way wall switch for this optional feature.  If using a remote system, or standard on/off wall switch, the fan will operate normally on high speed as set at as the factory default.

This powerful dual motor fan has one ceiling box which means that two fan motors connect to one ceiling grille for easy installation in a central location.  Wire each motor to a dual switch and timer and enjoy 2 speed cooling and ventilation at your fingertips.

This is the right fan to install in a larger room or hallway in combination smaller individual bedroom fans (QC-1500 or QC-2250) to attain the correct air flow for your home and for zoned control.

*We recommend wiring your fans to a the QuietCool WiFi Hub. This will allow you to control your fans from your SmartPhone or I-Pad. Using the Wi-Fi hub and Free control app download is easier to install and gives you greater control over your fans. You will need to install a WiFi Hub on each of your fan motors (you need two hubs for this 2 motor fan)  Using the WiFi Hub also simplifies the installation process since wires will not have to be pulled to the wall switch.  If you prefer to use the traditional wall mounted controls and switch, we recommend the IT-30020 double stack switch, IT-30070 8hr Timer & Plate. 

Note: For vertical wall installations (meaning the grill will be mounted on a wall instead of the ceiling) commonly used in rooms with attic space adjacent to a room with a vaulted ceiling) you will need to order a vertical wall adapter. The QC CL-6400 uses a 14" x 36" Vertical Wall Adapter VA-1436

Download The Classic Line Installation Guide(.pdf)qc-3100 fan manual 

Download QuietCool Product Information Sheet (.pdf)qc-3100 fan manual 

For cold weather locations increase your insulation value from R-5 to R-40 with the optional winter grille & insert kit item# WI-KIT-1436

FREE Shipping On This Item: Up To A $225.00 Value!

The QC-6400 is now known as the QC CL-6400.


Classic CL-6400 Advanced Direct Drive Whole House Fan with Dampers

QuietCool QC CL-6400 Specifications:

Motor Voltage 120 VAC, 60 Hz
Energy Use Hi: 623 Watts / Low: 287 Watts
Air Flow Hi: 6020 CFM / Low: 3226 CFM
Square Foot Coverage @ 2 CFM per SQ FT Covers up to 3000 SQ FT
# of Speeds 2
Duct Diameter 16"
Duct Length 6 feet
Motor Head Diameter 16 1/2"
Motor Head Length 13 1/2"
Sound Level in Room (measured 1m from grille) Hi: 50 dB
Low: 44 dB
Dampers Barometric Pressurized R5 Dampers
Controls (not included) 8 Hour Timer and Double Stack Switch or Wi-Fi Smart
Control (not included)
Warranty 10 Years
Framing None required
Joist Cutting None required; fits 16” or 24” on center
Minimum Suggested Attic Venting 8.0 SQ FT net free area
Ceiling Rough Opening 14 1/4" X 36 1/4"
Removable Grille Outside Dimension 16" x 38"
Shipping Weight 87 lbs.
Box Dimensions 42" x 20" x 38"
In the Box
- QC CL-6400 Motorheads - Damper Box
- Ceiling Grille - 6 foot duct (2)
- Cut-out template - Accessory bag (2) - Window locks

Item Number: QC CL-6400
Free Shipping

Whole House Fan Reviews

Rate This Product:
or Create a Review
(2 Ratings, 1 Review) Average Rating:
The QuietCool QC-6400 Is A Best Buy!
Mickey A. (Santa Clarita) 4/21/2014 4:10 PM
We used our fan for the first time after getting it installed yesterday. Almost immediately we noticed that the fan made a difference in the temperature in our home! We use to suffer in the evenings and while sleeping at night because our air conditioner was not big enough to keep up with the hear (especially upstairs). The QuietCool fan cooled very quickly and it is extremely quiet! A great feature is the option of running two motors at once or just one at a time. This whole house fan was a great purchase! I hope this review helps because I highly recommend this product.

Related Accessories:

IT-30020 whole house fan double switch
Wall Switch With 2 On-Off Switches IT-30020
MSRP: $29.99
Price: $25.99
You Save: $4.00 (13 %)
Wall Switch With 2 On-Off Switches IT-30020
smart attic fan smt 3.0
AFG SMT-3.0 Smart Attic Fan QuietCool
MSRP: $399.00
Price: $269.00
You Save: $130.00 (33 %)
AFG SMT-3.0  Smart Attic Fan QuietCool
QuietCool Smart Attic Fan: AFG SMT-3.0 • Variable 10-speed ECM motor that turn on and increases in CFM as the attic heat increases from. 80 degress up to 120 degrees. • Low cost to operate with Energy saver motor. • Automatically adjusts fan speed
it-30070 timer
Electronic Whole House Fan Timer IT-30070
MSRP: $59.99
Price: $37.00
You Save: $22.99 (38 %)
Electronic Whole House Fan Timer IT-30070
Shopping Cart

Your cart is empty.

Current Offers:

• Lowest Prices
• FREE Shipping Over $400
• Fast Delivery
• No Tax Outside CA

After Adding Items To Cart, Click either payment choice below to purchase.

Create A FREE Account?

Many customers purchase frequently from Wholehousefan Deals. A login makes is easy for you to store your basic information to make re-ordering quick and easy.

You can also check on your order status, tracking information, learn about future products and print an invoice.

Simply click to Create An Account or to login.

Sizing Guidelines:

Basic Level
Of Cooling: Calculate approximately 2.0
to 2.5 CFM Per Square Feet Of Living Space

Best Level Of Cooling: Calculate approximately 2.5 to 3.0 CFM Per Square Feet Of Living Space

More On System Sizing -
Buying the right sized QuietCool system is important to maximum cooling and ventilating efficiency.  It is strongly recommended that you install fans that have between 2-3 times your home’s square footage in total CFM of airflow.

secure shopping