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QuietCool Stealth Pro Line

The Stealth Pro line of QuietCool Advanced Whole House Fans was first introduced in 2014 and is an evolution of our Energy Saver Classic line. With energy consumption as low as 55 watts and a 15-year warranty, the QuietCool Stealth Pro Line offers ultra-high efficiency and peace of mind operation.

The Stealth Pro line of QuietCool Advanced Whole House Fans was first introduced in 2014 and is an evolution of our Energy Saver Classic line. With energy consumption as low as 55 watts and a 15-year warranty, the QuietCool Stealth Pro Line offers ultra-high efficiency and peace of mind operation.

The Stealth Pro line of QuietCool Advanced Whole House Fans was first introduced in 2014 and is an evolution of our Energy Saver Classic line. With energy consumption as low as 55 watts and a 15-year warranty, the QuietCool Stealth Pro Line offers ultra-high efficiency and peace of mind operation.

Need pricing? Find a local dealer or online retailers.  Find a Dealer

Stealth Pro Series Whole House Fan

The Stealth Pro is the second line in our Pro series. These units are also only available for purchase through one of our authorized wholesalers which can only be purchased by a licensed contractor. The models’ CFM range and speed options are similar to the Trident Pro series, along with the controls also being included in the box. The major component that separates the Stealth Pro series from the Trident series is the electronically commutated (ECM) AC/DC brushless motor. These motors are breaking new ground in the world of whole house fans! The motor contains a microchip that allows the motor to cycle from alternating current, to direct current. This is what has homeowners so excited and allows the incredible energy savings! Another great benefit of this “brushless” motor is there are less moving parts, which translates to fewer parts at risk of being damaged. The Stealth Pro series also comes with an industry leading 15-year motor warranty! If reducing your energy footprint by the largest margin is your main focus, or if you are looking to save the most money, then the Stealth Pro is the answer you have been looking for!

Stealth Pro Fan Features

Innovative and Patented Design

The QuietCool Stealth Pro whole house fan features our patented, self-contained duct system that hangs in the attic to help neutralize any noise vibrations. The result is the ability to use the system at any time without sound disturbance.

whole house fan quietcool Stealth Pro

R5 Insulated Damper System

The included damper system features barometric pressurized gravity dampers that insure there will be no heating/cooling loss between the home and attic. Compare this to traditional whole house fans that have old-style shutters with zero R-Value and it is not quite close.

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%.

quietcool whole house fan motor head
quietcool whole house fan warranty

Industry Leading Warranty

QuietCool offers an industry leading 15‐year warranty. With QuietCool, you will have the confidence that your fan will be operating at its fullest potential for a decade, or more likely, even longer! And if by some chance it breaks during that decade, you will know that you are completely covered on any parts that make up your QuietCool fan motor assembly.

98% Customer Satisfaction

QuietCool enjoys 98% total customer satisfaction. Enjoy peace of mind from thousands of satisfied QuietCool customers. For testimonials, please visit our Testimonial page.

quietcool 98 percent customer satisfaction

Stealth Pro Models

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Tech Specs

  • Name
    STL PRO-1.5X
  • Airflow*
    1479 CFM
  • HVI-916 Airflow (CA Title 24)**
    1040 CFM
  • dBA
    Hi: 37.2
  • Energy Efficiency
    66.7 Watts
  • Grille
    16 x 16
  • Attic Venting
    1.98 Sq.ft net free area
  • Covers Up To***
    740 sq. ft. / Small Rooms
  • Listen to this fan
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Tech Specs

  • Name
    STL PRO-2.5X
  • Airflow*
    Hi: 2541 CFM / Low: 2018 CFM
  • HVI-916 Airflow (CA Title 24)**
    1920 CFM
  • dBA
    Hi: 43.2 / Low: 37.2
  • Energy Efficiency
    Hi: 157 Watts / Low: 82.3 Watts
  • Grille
    16 in. x 20 in.
  • Attic Venting
    3.39 Sq.ft net free area
  • Covers Up To***
    1280 sq. ft. / Large Rooms
  • Listen to this fan
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Tech Specs

  • Name
    STL PRO-3.3X
  • Airflow*
    Hi: 3159 CFM / Low: 1980 CFM
  • HVI-916 Airflow (CA Title 24)**
    2350 CFM
  • dBA
    Hi: 47.4 / Low: 36.1
  • Energy Efficiency
    Hi: 264 Watts / Low: 74.6 Watts
  • Grille
    16 in. x 24 in.
  • Attic Venting
    4.22 Sq.ft net free area
  • Covers Up To***
    1580 sq. ft. / Small Homes
  • Listen to this fan
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Tech Specs

  • Name
    STL PRO-4.8X
  • Airflow*
    Hi:4280 CFM / Med:3500 CFM
    Low:2361 CFM
  • HVI-916 Airflow (CA Title 24)**
    3130 CFM
  • dBA
    Hi: 47.4 / Med: 43.2 / Low: 33.0
  • Energy Efficiency
    Hi: 408 Watts / Med: 225 Watts
    Low: 73.9 Watts
  • Grille
    16 in. x 32 in.
  • Attic Venting
    5.71 Sq.ft net free area
  • Covers Up To***
    2140 sq. ft. / Medium Homes
  • Listen to this fan
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Tech Specs

  • Name
    STL PRO-5.5X
  • Airflow*
    Hi:5044 CFM / Med:4238 CFM
    Low:2870 CFM
  • HVI-916 Airflow (CA Title 24)**
    3750 CFM
  • dBA
    Hi: 50.7 / Med: 45.7 / Low: 35.6
  • Energy Efficiency
    Hi: 490 Watts / Med: 268 Watts
    Low: 88 Watts
  • Grille
    16 in. x 32 in.
  • Attic Venting
    6.73 Sq.ft net free area
  • Covers Up To***
    2530 sq. ft. / Medium/Large Homes
  • Listen to this fan
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Tech Specs

  • Name
    STL PRO-6.0X
  • Airflow*
    Hi:5587 CFM / Med:4262 CFM
    Low:3428 CFM
  • HVI-916 Airflow (CA Title 24)**
    4030 CFM
  • dBA
    Hi: 51.1 / Med: 45.7 / Low: 38.5
  • Energy Efficiency
    Hi: 462 Watts / Med: 210 Watts
    Low: 113 Watts
  • Grille
    16 in. x 38 in.
  • Attic Venting
    7.45 Sq.ft net free area
  • Covers Up To***
    2800 sq. ft. / Large Home
  • Listen to this fan
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Tech Specs

  • Name
    STL PRO-7.0X
  • Airflow*
    Hi:6996 CFM / Med:5448 CFM
    Low:4308 CFM
  • HVI-916 Airflow (CA Title 24)**
    5200 CFM
  • dBA
    Hi: 54.3 / Med: 47.4 / Low: 41.4
  • Energy Efficiency
    Hi: 725 Watts / Med: 319 Watts
    Low: 166 Watts
  • Grille
    16 in. x 38 in.
  • Attic Venting
    9.33 Sq.ft net free area
  • Covers Up To***
    3500 sq. ft. / Large/Extra Large Homes
  • Listen to this fan

*Listed airflow specs are tested via a device that is calibrated to NIST standards.

**HVI-916 airflow specs are to be used by energy consultants and builders for CA Title 24 modeling

***Recommended SQFT Coverage @ 2 CFM per SQ FT

Product Recommendation

To view our product recommendations for your home, please select your home size below.

If your home falls in between two sizes, select the larger size.

Stealth Pro Fan Installation

QuietCool whole house fans are easy to install for the skilled do‐it‐your‐selfer and licensed contractor alike. Every system comes with very detailed, full‐color, written instructions that walk you step‐by‐step through the installation process.

You can access a detailed installation video and wiring video for your model below. In every case, we strongly recommend that a competent, licensed electrician complete all wiring connections.

QC Manufacturing recommends all listed, Authorized QuietCool Dealers for your sales and installation needs. Visit our Dealer Locator to find a dealer near you.

Support

Customer support

Contact Us

Please visit our Support page to send comments, questions, or any conerns.

Product information articles and FAQ

Knowledgebase

Are you having trouble with your QuietCool Whole House Fan? Please visit the Support page for answers in QuietCool’s knowledge base.