QuietCool Trident PRO 5.5X Whole House Fan

Designed for medium and large homes. This fan features two speeds. Cools and ventilates up to 2,540 square feet.

Download Technical Specs

[wpforms id=”1033″ title=”true” description=”true”]


Designed for medium and large homes. This fan features two speeds. Cools and ventilates up to 2,540 square feet.


  • Professional Series
  • Standard Efficiency PSC Motors
  • 1 & 2 speed controllable
  • Innovative and Patented Design
  • Built in California
  • 15 Year Warranty
  • Removable Egg­-Crate Grille
  • Included Wall Switch Controls

The Trident Pro line fans not only deliver astounding performance, but they do it at the sound of a whisper. The Trident Pro is great for homeowners who want fresher, cooler air while enjoying peace and quiet. Our Trident Pro fans operate at an average of 47 dB, much quieter than the sound of an average A/C unit!

Superior Performance, Great Efficiency

The Trident Pro line is also the perfect for a smaller budget, being the least expensive line within the Professional Series. Yet, you still won’t have to sacrifice energy efficiency for price. The Trident Pro’s energy efficiency is above the average of traditional whole house fans.

The Trident Pro line includes removable grilles and wall switch controls in every box.

QuietCool’s patented acoustical ducting makes the Trident Pro’s operation whisper quiet. That’s because there’s six feet of separation between the fan’s motor-head and the ceiling grill inside the house. More affordable, more cooler air. Less noise and less to pay on energy bills.

New for 2018

The Trident Pro line has been expanded to include the two most powerful fans we have ever created: the TRI PRO-6.0 and TRI PRO-7.0. Both fans feature a single-motorhead design with the largest fan blades we have ever put into a fan.

Removable Grille

The Trident Pro line comes standard with a removable egg-crate grille that will allow for easy cleaning. This grille will also allow you to use our optional R40 winterized insert that can be placed inside of the grille during winter to give you an exceptional insulation value.


The Trident Pro line also comes with standard wall switch controls including an 8 Hour Countdown Time and a speed control switch (if applicable).

15-Year Warranty

All of our Professional Series fans come with a standard 15-year warranty. QuietCool’s 15-year warranty is an industry first and will guarantee that your fans will operate at the highest performance possible for 15 years or longer.

Additional information

Motor Voltage

120 VAC, 60 Hz

Energy Use

Hi: 632 Watts / Low: 522 Watts

Air Flow

Hi: 5068 CFM / Low: 4438 CFM

HVI-916 Airflow (for CA Title 24 New Construction)

Hi: 3940 CFM / Low: 3220 CFM


Hi: 51.2 / Low: 43.6

Minimum Attic Clearance


# of Speeds


Duct Diameter


Duct Length

9 feet

Motor Head Diameter

20 1/2”

Motor Head Length

13 1/2”


Barometric Pressurized R5 Dampers


Included: 8 Hr Electronic Timer & HI-LOW-OFF switch, Optional: IT-36002 QuietCool RF Wireless Control Kit


None Required

Joist Cutting

Fits 16” or 24” on center, None Required

Minimum Suggested Attic Venting

6.76 SQ FT net free area

Ceiling Rough Opening

14 1/4” x 30 1/4”

Removable Grille Outside Dimension

16” x 32”

Shipping Weight

75 lbs.

Box Dimensions

39” x 24” x 39”

In The Box

9 Foot Duct, Accessory Bag, Controls, Cut-out Template, Damper Box, QC TRI PRO-5.5X Motorhead, Removable Grille, Window Locks