The QC 4500 D whole house fan moves 4,712 CFM of air flow while using only 498 watts of power. This QuietCool fan is easy to install and has insulated, self-closing damper doors that prevent air from moving between the home's living space and the attic when the fan is not in operation. Insulated air-conditioning-grade ducting is used in the QuietCool system to reduce irritating fan noise.

If this QuietCool fan is going to be used in a vertical mount wall, the "Vertical Adapter" QC-60094 must be ordered to insure that the dampers can fully close.

The QUIETCOOL QC-4500 (U.S. Patent #7497774) will help you slash your A/C related electricity costs by 50-90%* and pays for itself faster than any other "green energy" product on the market today.

The "Quiet Giant" QC 4500 is our #1 selling whole house fan. Compared side by side to the old-fashioned attic fans of yesteryear, home owners daily contact QuietCool dealers to "take that noisy attic fan out of my ceiling" and "install a Quiet Giant QC 4500."

Watch the James Carey "On the House" video down below for proof!

Perfect for larger size homes; place a QC 4500 at the top of the stairs, turn both motors on when you come home from work ---- instead of expensive air conditioning ---- and watch your interior home temperature plummet in just minutes.

Specifications

Motor Voltage 120 V. AC, 60 Hz 2 SPEED

Energy Use 498 Watts High Speed/249 Watts Low Speed

Air Flow 4,712 CFM High Speed/2457 CFM Low Speed

CFM/Watt- Efficiency Rating 9.5

Square Foot Coverage @ 2 CFM per SQ FT Covers up to 2350 SQ FT

# 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" 47 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 6 SQ FT net free area

Ceiling Rough Opening14 1/4" X 36 1/4"

Ceiling Grill Outside Dimension 16" x 38"

Ceiling Grill Color White- High Volume Air Flow

Shipping Weight 81 Lbs.

Ship Carton Dimensions 39" x 20" x 38"

Ship Carton Cube 17.1

UL ComponentUL Listing Numbers

Motor E62815; E62788; E62862

Power Cord E55178; E147323

RACO Handy Box & Cover E195978