QuietCool Stealth Pro X Series

Extremely Efficient    ~    Energy Use as Low as 66.7 watts to 166 watts    ~    Super Quiet

 The QuietCool Stealth Pro model is the flagship home cooling fan.  With a microchip controlled Electrically Commutated Motor (ECM motors are next generation offering very high efficiency and long life) these fans have unmatched warranty protection and are direct drive meaning there are no belts to tighten and no lubrication required.  These fans are nearly maintenance free, other than occassional cleaning of the removable intake grill.  The real benefit is the efficiency of the ECM motor, operating on as low as 100 watts - 30 times less consumption than the average central air conditioner.  Stop wasting money trying to cool your house with central air conditioning when you can install a QuietCool fan and create a breeze of cool Colorado air throughout the home.  

~     New     ~

An affordable wireless RF controller is available exclusively from QuietCool dealers.  This combination switch / timer eliminates the need to install new wiring in the walls.  Controllers can be added or moved as desired with no more than a screwdriver.
Stealth Pro 1.5X
Stealth Pro 2.5X
Stealth Pro 3.3X
Stealth Pro 4.8X
Stealth Pro 5.5X
Stealth Pro 6.0X
Stealth Pro 7.0X
QuietCool QC STL PRO-3.3X


​The QuietCool QC STL PRO-3.3X is perfect for cooling and ventilating small homes rooms.


Product Specifications:
  • Motor Voltage:  120VAC, 60 Hz
  • Energy Use:  Hi:  264 Watts / Low:  74.6 Watts
  • Air Flow:  Hi:  3159 CFM / Low:  1980 CFM
  • dBA:  Hi:  47.4 / Low:  36.1
  • Recommended SQFT Coverage @ 2 CFM per SQFT:  Covers 1053 SQFT to 1580 SQFT
  • Number of Speeds:  2
  • Duct Diameter:  16"
  • Duct Length:  6 feet
  • Motor Head Diameter:  16 1/2"
  • Motor Head Length:  13 1/2"
  • Dampers:  Barometric Pressurized R5 Dampers
  • Controls:  Included 8 Hour Electronic Timer and HI-LOW-OFF switch
  • Warranty:  15 Years
  • Framing:  None Required
  • Joist Cutting:  None Required:  fits 16" or 24" on center
  • Minimum Suggested Attic Venting:  4.22 SQFT net free area
  • Ceiling Rough Opening:  14 1/4" x 22 1/4"
  • Removable Grille Outside Dimension:  16" x 24"
  • In The Box:  
    • QC STLPRO-3.3X Motorhead
    • Removable Grille
    • Cut-out Template
    • Window Locks
    • Damper Box
    • 6 Foot Duct
    • Accessory Bag
    • Controls