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.

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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 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*** 439 SQFT to 739 SQFT / Small Rooms
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Tech Specs
Name STL PRO-2.5X
Airflow* Hi: 2541 CFM / Low: 2018 CFM
HVI-916 Airflow (CA Title 24)** Hi: 1920 CFM / Low: 1510 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*** 847 SQFT to 1271 SQFT / Large Rooms
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Tech Specs
Name STL PRO-3.3X
Airflow* Hi: 3159 CFM / Low: 1980 CFM
HVI-916 Airflow (CA Title 24)** Hi: 2350 CFM / Low: 1470 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*** 1053 SQFT to 1580 SQFT / Small Homes
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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)** Hi: 3130 CFM / Med: 2560 CFM / Low: 1670 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*** 1427 SQFT to 2140 SQFT / Medium Homes
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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)** Hi: 3750 CFM / Med: 3070 CFM / Low: 2010 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*** 1681 SQFT to 2522 SQFT / Medium/Large Homes
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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)** Hi: 4030 CFM / Med: 3070 CFM / Low: 2440 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*** 1862 SQFT to 2794 SQFT / Large Home
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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)** Hi: 5200 CFM / Med: 3990 CFM / Low: 3180 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*** 2332 SQFT to 3498 SQFT / Large/Extra Large Homes
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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.

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Minimum: Stealth PRO‑1.5x

You will need 1.9 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑1.5x fan.

Maximum: Stealth PRO‑2.5x

You will need 2.8 sq-ft. of Attic Venting

For maximum airflow, we recommend the QuietCool Stealth PRO‑2.5x fan.

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Minimum: Stealth PRO‑2.5x

You will need 2.7 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑2.5x fan.

Maximum: Stealth PRO‑3.3x

You will need 4 sq-ft. of Attic Venting

For maximum airflow, we recommend the QuietCool Stealth PRO‑3.3x fan.

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Minimum: Stealth PRO‑3.3x

You will need 3.5 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑3.3x fan.

Maximum: Stealth PRO‑4.8x

You will need 5.2 sq-ft. of Attic Venting

For maximum airflow, we recommend the QuietCool Stealth PRO‑4.8x fan.

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Minimum: Stealth PRO‑4.8x

You will need 4.3 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑4.8x fan.

Maximum: Stealth PRO‑5.5x

You will need 6.4 sq-ft. of Attic Venting

For maximum airflow, we recommend the QuietCool Stealth PRO‑5.5x fan.

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Minimum: Stealth PRO‑4.8x

You will need 5.1 sq-ft. of Attic Venting

For minimum airflow, we recommend a centrally located Stealth PRO‑4.8x fan.

Maximum: Stealth PRO‑5.5x, Stealth PRO‑1.5x

You will need 7.6 sq-ft. of Attic Venting

For maximum airflow, we recommend a centrally located Stealth PRO‑5.5x fan with a Stealth PRO‑1.5x in the master bedroom.

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Minimum: Stealth PRO‑5.5x

You will need 5.9 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑5.5x fan.

Maximum: Stealth PRO‑6.0x, Stealth PRO‑1.5x

You will need 8.8 sq-ft. of Attic Venting

For maximum airflow, we recommend a centrally located QuietCool Stealth PRO‑6.0x and a Stealth PRO‑1.5x in the master bedroom.

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Minimum: Stealth PRO‑5.5x

You will need 6.7 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑5.5x fan.

Maximum: Stealth PRO‑6.0x, Stealth PRO‑2.5x

You will need 10 sq-ft. of Attic Venting

For maximum airflow, we recommend a centrally located Stealth PRO‑6.0x fan and a Stealth PRO‑2.5x in the master bedroom.

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Minimum: Stealth PRO‑6.0x

You will need 7.5 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑6.0x fan.

Maximum: Stealth PRO‑7.0x, Stealth PRO‑2.5x

You will need 11.2 sq-ft. of Attic Venting

For maximum airflow, we recommend a centrally located Stealth PRO‑7.0x with a Stealth PRO‑2.5x in the master bedroom.

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Minimum: Stealth PRO‑7.0x

You will need 8.3 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑7.0x fan.

Maximum: Stealth PRO‑7.0x, Stealth PRO‑2.5x

You will need 12.4 sq-ft. of Attic Venting

For maximum airflow, we recommend a centrally located Stealth PRO‑7.0x with a Stealth PRO‑2.5x in the master bedroom.

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Minimum: Stealth PRO‑7.0x

You will need 9.1 sq-ft. of Attic Venting

For minimum airflow, we recommend the QuietCool Stealth PRO‑7.0x fan.

Maximum: Stealth PRO‑7.0x, Stealth PRO‑3.3x

You will need 13.6 sq-ft. of Attic Venting

For maximum airflow, we recommend a centrally located Stealth PRO‑7.0x with a Stealth PRO‑3.3x in the master bedroom.

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Minimum: Stealth PRO‑6.0x, Stealth PRO‑2.5x

You will need 9.9 sq-ft. of Attic Venting

For minimum airflow, we recommend a centrally located Stealth PRO‑6.0x fan with a Stealth PRO‑2.5x in the master bedroom.

Maximum: Stealth PRO‑6.0x, Stealth PRO‑3.3x, Stealth PRO‑2.5x

You will need 14.8 sq-ft. of Attic Venting

For maximum airflow, we recommend a centrally located Stealth PRO‑6.0x fan with a Stealth PRO‑3.3x in the master bedroom and Stealth PRO‑2.5x in a 2nd bedroom.

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Minimum: Stealth PRO‑6.0x, Stealth PRO‑2.5x

You will need 10.7 sq-ft. of Attic Venting

For minimum airflow, we recommend a centrally located Stealth PRO‑6.0x fan with a Stealth PRO‑2.5x in the master bedroom.

Maximum: Stealth PRO‑7.0x, Stealth PRO‑3.3x, Stealth PRO‑2.5x

You will need 16 sq-ft. of Attic Venting

For maximum airflow, we recommend a centrally located Stealth PRO‑7.0x fan with a Stealth PRO‑3.3x in the master bedroom and Stealth PRO‑2.5x in a 2nd bedroom.

Stealth Pro Fan Features

Innovated 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.

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R5 Insulated Damper System

The included damper system features barometric pressurized gravity dampers that ensure 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.

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R5 Insulated Damper System

The included damper system features barometric pressurized gravity dampers that ensure 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%.

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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.

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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.

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