An Advanced Whole House Fan That Lasts
The QuietCool Stealth Pro differs from its counterpart the QuietCool Trident Pro by a few key features. One major difference is the motor technology that is the brain of the fan. The ECM (Electronic Commutated Motor) is a brushless AC/DC motor that uses significantly less energy to power the fan. This is the next generation motor of high-efficiency whole house fans. These motors are also equipped with advanced microchip controllers that maximize performance and energy consumption. The ECM is also capable of producing a wide amount of CFM's through multiple speeds. Operating at a lower speed also means lower electrical usage which costs less on any electrical bill. If you're looking to install a QuietCool Stealth whole house fans, contact us today for a free over the phone quote.
What is a QuietCool Whole House Fan?
QuietCool has revolutionized and created an advanced whole house fan that is ducted. This whole house fan system is capable of producing large amounts of airflow at a lower energy cost. These systems can help cool your home much cheaper than any air conditioning unit.

The QuietCool QC STL PRO-1.5 is the perfect small bedroom fan for homes that are using whole house fans for zoned cooling.
Zoned cooling is when you install multiple whole house fan units in the rooms inside your home. Most zoned systems include a master bedroom fan, a hallway fan, and a fan in each individual bedroom.
The QC STL PRO-1.5 is perfect for the other bedrooms within your home.
Moving 1,508 CFM, the QC STL PRO-1.5 uses only 60 watts of power to run.
Contact us today for a quote or free in-home consultation for sizing information.
Product Specifications
– Motor Voltage: 120 VAC, 60 Hz
– Energy Use: 66.7 Watts
– Air Flow: 1479 CFM
– Recommended SQFT Coverage @2CFM per SQFT: Covers up to 740 SQFT
– Number of Speeds: 1
– Duct Diameter: 14″
– Duct Length: 6ft.
– Motor Head Diameter: 14 1/2″
– Motor Head Length: 13 1/2″
– Dampers: Barometric Pressurized R5 Dampers
– Controls: included 8 Hour Electronic Timer
– Warranty: 15 years
– Framing: None Required
– Joist Cutting: None Required; fits 16″ or 24″ on center
– Minimum Suggested Attic Venting: 1.98 SQFT net free area
– Ceiling Rough Opening: 14 1/4″ x 14 1/4″
– Removable Grille Outside Dimension: 16″ x 16″

The QuietCool QC STL PRO-2.5 is the perfect large bedroom fan for homes that are using whole house fans for zoned cooling.
Zoned cooling is when you install multiple whole house fan units in the rooms inside your home. Most zoned systems include a master bedroom fan, a hallway fan, and a fan in each individual bedroom.
The QC STL PRO-2.5 is perfect for the master bedroom within your home. Install one QC STL PRO-2.5 in your master bedroom and one QC STL PRO-4.8 in your hallway and enjoy a great, zoned system.
Moving 2,508 CFM, the QC STL PRO-2.5 uses only 160 watts of power to run.
Contact us today for a quote or free in home consultation for sizing information.
Product Specifications
– Motor Voltage: 120 VAC, 60 Hz
– Energy Use: Hi: 157 Watts / Low: 82.3 Watts
– Air Flow: Hi: 2541 CFM / Low: 2018 CFM
– Recommended SQFT Coverage @2CFM per SQFT: Covers up to 1280 SQFT
– Number of Speeds: 2
– Duct Diameter: 16″
– Duct Length: 6ft.
– 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: 3.39 SQFT net free area
– Ceiling Rough Opening: 14 1/4″ x 18 1/4″
– Removable Grille Outside Dimension: 16″ x 20″

The QuietCool QC STL PRO-3.3 is a perfect hallway fan for homes that are using whole house fans for zoned cooling.
Zoned cooling is when you install multiple whole house fan units in the rooms inside your home. Most zoned systems include a master bedroom fan, a hallway fan, and a fan in each individual bedroom.
The QC STL PRO-3.3 is perfect for installing in the hallway within your home. Install one QC STL PRO-3.3 in your hallway and one QC STL PRO-2.5 in your master bedroom and enjoy a great, zoned system.
Moving 3,308 CFM, the QC STL PRO-3.3 uses only 260 watts of power to run.
Contact us today for a quote or free in home consultation for sizing information.
Product Specifications
– Motor Voltage: 120 VAC, 60 Hz
– Energy Use: Hi: 264 Watts / Low: 74.6 Watts
– Air Flow: Hi: 3159 CFM / Low: 1980 CFM
– Recommended SQFT Coverage @2CFM per SQFT: Covers up to 1580 SQFT
– Number of Speeds: 2
– Duct Diameter: 16″
– Duct Length: 6ft.
– 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

The QuietCool QC STL PRO-4.8 is a perfect hallway fan for homes that are using whole house fans for zoned cooling, or as a single central fan for homes up to 2400 square feet.
Zoned cooling is when you install multiple whole house fan units in the rooms inside your home. Most zoned systems include a master bedroom fan, a hallway fan, and a fan in each individual bedroom.
The QC STL PRO-4.8 is perfect for installing in the hallway within your home. Install one QC STL PRO-4.8 in your hallway and one QC STL PRO-2.5 in your master bedroom and enjoy a great, zoned system.
Moving 4,467 CFM, the QC STL PRO-4.8 uses only 491 watts of power to run.
Contact us today for a quote or free in home consultation for sizing information.
Product Specifications
– Motor Voltage: 120 VAC, 60 Hz
– Energy Use: Hi: 408 Watts / Med: 225 Watts / Low: 73.9 Watts
– Air Flow: Hi: 4280 CFM / Med: 3500 CFM / Low: 2361 CFM
– Recommended SQFT Coverage @2CFM per SQFT: Covers up to 2140 SQFT
– Number of Speeds: 3
– Duct Diameter: 18″
– Duct Length: 9ft.
– Motor Head Diameter: 18 1/2″
– Motor Head Length: 13 1/2″
– Dampers: Barometric Pressurized R5 Dampers
– Controls: included 8 Hour Electronic Timer and Double 3-Way
– Warranty: 15 years
– Framing: None Required
– Joist Cutting: None Required; fits 16″ or 24″ on center
– Minimum Suggested Attic Venting: 5.71 SQFT net free area
– Ceiling Rough Opening: 14 1/4″ x 30 1/4″
– Removable Grille Outside Dimension: 16″ x 32″

The QuietCool QC STL PRO-5.5 is a perfect hallway fan for homes that are using whole house fans for zoned cooling, or as a single central fan for homes up to 2,800 square feet.
Zoned cooling is when you install multiple whole house fan units in the rooms inside your home. Most zoned systems include a master bedroom fan, a hallway fan, and a fan in each individual bedroom.
The QC STL PRO-5.5 is perfect for installing in the hallway within your home. Install one QC STL PRO-5.5 in your hallway and one QC STL PRO-2.5 in your master bedroom and enjoy a great, zoned system.
Moving 5,688 CFM, the QC STL PRO-5.5 uses only 724-82 watts of power to run.
Contact us today for a quote or free in home consultation for sizing information.
Product Specifications
– Motor Voltage: 120 VAC, 60 Hz
– Energy Use: Hi: 490 Watts / Med: 268 Watts / Low: 88 Watts
– Air Flow: Hi: 5044 CFM / Med: 4238 CFM / Low: 2870 CFM
– Recommended SQFT Coverage @2CFM per SQFT: Covers up to 2530 SQFT
– Number of Speeds: 3
– Duct Diameter: 20″
– Duct Length: 9ft.
– Motor Head Diameter: 20 1/2″
– Motor Head Length: 13 1/2″
– Dampers: Barometric Pressurized R5 Dampers
– Controls: included 8 Hour Electronic Timer and Double 3-Way
– Warranty: 15 years
– Framing: None Required
– Joist Cutting: None Required; fits 16″ or 24″ on center
– Minimum Suggested Attic Venting: 6.73 SQFT net free area
– Ceiling Rough Opening: 14 1/4″ x 30 1/4″
– Removable Grille Outside Dimension: 16″ x 32″

The QuietCool QC STL PRO-6.0 is a perfect hallway fan for homes that are using whole house fans for zoned cooling, or as a single central fan for homes up to 2,800 square feet.
Zoned cooling is when you install multiple whole house fan units in the rooms inside your home. Most zoned systems include a master bedroom fan, a hallway fan, and a fan in each individual bedroom.
The QC STL PRO-6.0 is perfect for installing in the hallway within your home. Install one QC STL PRO-6.0 in your hallway and one QC STL PRO-2.5 in your master bedroom and enjoy a great, zoned system.
Moving 5,587 CFM, the QC STL PRO-6.0 uses only Hi: 462 / Low: 113 watts of power to run.
Contact us today for a quote or free in home consultation for sizing information.
Product Specifications
– Motor Voltage: 120 VAC, 60 Hz
– Energy Use: Hi: 462 Watts / Med: 210 Watts / Low: 113 Watts
– Air Flow: Hi: 5587 CFM / Med: 4262 CFM / Low: 3428 CFM
– Recommended SQFT Coverage @2CFM per SQFT: Covers up to 2800 SQFT
– Number of Speeds: 3
– Duct Diameter: 22″
– Duct Length: 9ft.
– Motor Head Diameter: 22 1/2″
– Motor Head Length: 13 1/2″
– Dampers: Barometric Pressurized R5 Dampers
– Controls: included 8 Hour Electronic Timer and Double 3-Way
– Warranty: 15 years
– Framing: None Required
– Joist Cutting: None Required; fits 16″ or 24″ on center
– Minimum Suggested Attic Venting: 7.45 SQFT net free area
– Ceiling Rough Opening: 14 1/4″ x 36 1/4″
– Removable Grille Outside Dimension: 16″ x 38″

The QuietCool QC STL PRO-7.0 is a perfect hallway fan for homes that are using whole house fans for zoned cooling, or as a single central fan for homes up to 3,500 square feet.
Zoned cooling is when you install multiple whole house fan units in the rooms inside your home. Most zoned systems include a master bedroom fan, a hallway fan, and a fan in each individual bedroom.
The QC STL PRO-7.0 is perfect for installing in the hallway within your home. Install one QC STL PRO-7.0 in your hallway and one QC STL PRO-2.5 in your master bedroom and enjoy a great, zoned system.
Moving 6,996 CFM, the QC STL PRO-7.0 uses only Hi: 725 / Low: 166 watts of power to run.
Contact us today for a quote or free in home consultation for sizing information.
Product Specifications
– Motor Voltage: 120 VAC, 60 Hz
– Energy Use: Hi: 725 Watts / Med: 319 Watts / Low: 166 Watts
– Air Flow: Hi: 6996 CFM / Med: 5448 CFM / Low: 4308 CFM
– Recommended SQFT Coverage @2CFM per SQFT: Covers up to 3500 SQFT
– Number of Speeds: 3
– Duct Diameter: 24″
– Duct Length: 9ft.
– Motor Head Diameter: 24 1/2″
– Motor Head Length: 13 1/2″
– Dampers: Barometric Pressurized R5 Dampers
– Controls: included 8 Hour Electronic Timer and Double 3-Way
– Warranty: 15 years
– Framing: None Required
– Joist Cutting: None Required; fits 16″ or 24″ on center
– Minimum Suggested Attic Venting: 9.33 SQFT net free area
– Ceiling Rough Opening: 14 1/4″ x 36 1/4″
– Removable Grille Outside Dimension: 16″ x 38″

Removable Grille
Every QuietCool Trident Pro X Series Whole House Fan includes a removable grille that is easily accessible for easy cleaning. It can also be used to hold a winterized insulation kit to increase the R5 value to R45.

Damper System
QuietCool damper systems are engineered to not only dampen the sound the fan makes but also to ensure that there is no heat/cooling loss between the home and the attic space.

Included Controls
All Trident Pro models include the needed wall‐switch controls standard. This includes an Electronic 8‐Hour Countdown Timer and a speed control switch (when applicable).