QC STL PRO-3.3X
QuietCool Stealth Pro Line

QC STL PRO-3.3X Specifications
Motor Voltage | 120 VAC, 60 Hz |
Energy Use | Hi: 264 Watts / Low: 74.6 Watts |
Air Flow | Hi: 3159 CFM / Low: 1980 CFM |
HVI-916 Airflow (for CA Title 24 New Construction) | 2350 CFM |
dBA | Hi: 47.4 / Low: 36.1 |
Recommended SQFT Coverage @ 2-3 CFM per SQFT | Covers 1053 SQFT to 1580 SQFT |
Minimum Attic Clearance | 34” |
# 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 Hr Electronic Timer & HI-LOW-OFF switch Optional: IT-36002 QuietCool RF Wireless Control Kit |
Warranty | 15 Years |
Framing | None Required |
Joist Cutting | None Required; fits 16” or 24” on center |
Minimum Suggested Attic Venting | 4.22 SQ FT net free area |
Ceiling Rough Opening | 14 1/4” x 22 1/4” |
Removable Grille Outside Dimension | 16” x 24” |
Shipping Weight | 55 lbs. |
Box Dimensions | 27” x 20” x 38” |
In The Box | -QC STL PRO-3.3X Motorhead -Removable Grille -Cut-out Template -Window Locks -Damper Box -6 Foot Duct -Accessory Bag -Controls |
Electronically Commutated AC/DC Brushless Motor
All QuietCool Stealth Pro Line fans include our ultra-high efficiency electronically commutated AC/DC brushless motors. Known as “ECM” motors, these motors offer ultra-high efficiency with very high CFM/Watt ratios. All Stealth Pro fans operate on low wattage and low amperage. These motors are so efficient that they can help homeowners slash their A/C related electricity costs by up to 50-90%.
