QT90E90 CFM Ultra Quiet Bath Fan

  • Overview
  • Specifications
  • Accessories
  • Reviews
  • Answers
  • Sensonic Speaker Accessory

    Ultra-quiet, high performance bath fan with a modern-styled grille.
    • 90 CFM
    • 1.5 Sones
    • Sturdy, easy, four-point mounting directly to joist
    • Includes unique spacer (patent pending) for mounting to engineered “I” joists
    • 7-5/8” height allows for 2” x 8” (nominal) joist installations
    • Polymeric, 4” round duct connector with tapered sleeve and no metallic clatter
    • Dynamically balanced centrifugal blower wheel for quiet, efficient performance
    • Plug-in, permanently lubricated motor - engineered for continuous operation
  • Bathrooms up to (X) Square FeetN/A
    Ceiling InstallationYes
    CFM @ 0.10"90
    CFM @ 0.125"N/A
    CFM @ 0.25"72
    cUL ListedNo
    Duct DirectionHorizontal
    Duct Size4"
    ENERGY STAR® certified productYes
    Globe ColorN/A
    Grille FinishWhite Polymeric
    Grille Length13"
    Grille Width14"
    Heater wattageN/A
    Housing Dimension LxWxH10-1/2" x 11-3/8" x 7-5/8"
    Housing Height7-5/8"
    Housing Length10-1/2"
    Housing Width11-3/8"
    Humidity SensingNo
    HVI CertifiedYes
    Light Bulb Quantity0
    Light Bulb WattageN/A
    Light Bulb(s) IncludedNo
    Lighting TypeNo Light
    Minimum construction space required2x8
    Motor engineered for continuous operationYes
    Product Weight12.4 lbs
    Rated Amps0.3
    Rated Sones - VerticalN/A
    Rated Watts36.3
    UL Listed for use over bathtubs or showers when connected to a GFCI circuitYes
    Wall InstallationNo
    Warranty3 Years
    Watts @ 0.1"36.3
    Watts @ 0.25"36.2
  • QT90E is rated 4.5 out of 5 by 22.
    Rated 5 out of 5 by from Great fan, very quiet. We have had this fan for awhile and are very pleased with it. We replaced a very noisy fan since the fan is wired into the light circuit. It removes much more moisture from the air which keeps the mirror from steaming up. All in all it was a good purchase.
    Date published: 2015-02-26
    Rated 3 out of 5 by from Not what I hoped but perhaps my fault. In order for a bathroom fan to be effective it must turn on when it is humid as humans do not volunteer to do so when in a warm shower. So I hooked this one up to a switch with a humidistat which is too low in the room to turn on as soon as needed. In my former home we installed a fan which had a built in sensor. I miss that. The mirrors fog up. Perhaps my room is too tight and I need another vent opening to move the air out and new air in. Also, it was very quiet in the store display, but it is not as quiet in my room. I thought perhaps that was my fault for I installed it with wooden braces on all four sides.
    Date published: 2015-02-10
    Rated 5 out of 5 by from Excellent upgrade from our existing fan We are remodeling our 28 year old bathroom. The original fan barely removed the air from the bathroom. We wanted a quiet and strong fan and this model met our needs. We had an electrician install this fan as it was bigger than the fan it replaces. The newly installed fan works well. The only criticism would be it is a bit noisier than what I expected. I can put up with a small amount of noise as long as the exhausting of the steam is well handled. So far so good, we like this fan and would purchase it again. The design of the fan cover is a good match for our bathroom.
    Date published: 2014-07-14
    Rated 5 out of 5 by from It is so quiet and really takes out the steam in the bathroom We wanted something quiet and something that looked nice. This fan is just perfect. It really is.
    Date published: 2014-03-11
    Rated 5 out of 5 by from Extremely Quiet! Very easy to install. The unit is extremely quiet!
    Date published: 2014-03-11
    Rated 5 out of 5 by from Very good product. This product is very quiet and efficient. It is everything I expected it to be.
    Date published: 2014-03-10
    Rated 4 out of 5 by from needs a template When replacing an older smaller fan, it would be helpful to include a cutout template to install the new fan. The fan dimensions are not big enough, and by measuring from all of the tabs it was too big of a hole. Other than that the fan is good.
    Date published: 2014-02-22
    Rated 2 out of 5 by from Nice and quiet while running.....but I installed this vent approximately 1-1/2 years ago and the motor now spins at such a slow speed it no longer pulls air. While looking for a new motor I find that this motor is no longer available and the replacement costs almost as much as a whole new unit. I am hoping I merely bought a "lemon".
    Date published: 2013-07-16
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  • Backdraft damper does not close.

    The backdraft damper does not close and large quantities of cold air come backwards through the fan. The damper swings partially open even when a strong backdraft is present. Is there a solution to this problem? The ductwork from the fan to the outside is not accessible.
    Asked by: Ham Operator
    Thank you for your question on the model QT90E ventilation fan. The damper for the fan is designed to stay open slightly. We recommend using a wall cap or roof cap with a built-in back draft damper. It is the job of the wall/roof cap to stop the air from coming back through the duct work. Unfortunately, this may still occur during extremely windy or stormy days. We have included a picture from the installation instructions for your convenience. If you would like to discuss this further, please contact our Technical Support Department directly at 800-637-1453.
    Answered by: BroanCustomerService
    Date published: 2017-01-07

    Hole size to cut in existing ceiling?

    Installation in existing ceiling, not new construction. Instructions do not include a template or mention how big a hole to cut. I can only assume hole is as wide as bent edges on open end of housing. That is the only way housing tabs can contact bottom of joist.
    Asked by: Tomtom
    Thank you for your question on the model QT90E exhaust fan. If you have access from above (an attic or crawl space) you would want to cut the hole the size of the bottom outside flanges of the unit housing. You could then drop it down through the hole and mount it so the bottom flange is even with the finished side of the ceiling. If you do not have access from above, you will need to cut the hole larger than would normally be needed and patch the ceiling after it is installed.
    Answered by: BroanCustomerService
    Date published: 2013-10-23

    Flexible tube or rigid?

    The instructions state rigid round 4" venting tube. Broan also makes 4' round flexible vent tubing, is the flexible tubing an acceptable substitute?
    Asked by: Frommie75
    Thank you for your question on the Broan QT90E ventilation fan. It is recommended, where possible, to use rigid duct. It has less resistance to air flow and allows the fan to operate much more efficiently. If flexible duct is used, be sure the duct is as straight as possible.
    Answered by: BroanCustomerService
    Date published: 2014-05-20

    What is the maximum duct length for this product?

    Duct length plus 90''s
    Asked by: Kevin
    Thank you for your question on the model QT90E exhaust fan. The QT90E can handle up to 18 feet of straight, four inch, rigid duct work. You would need to reduce that distance by four feet for every elbow.
    Answered by: BroanCustomerService
    Date published: 2014-05-28
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