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CVLD44-inch Sleeve with Damper; Ventilation Fans

  • Overview
  • Specifications
  • Reviews
  • Answers
  • Mounting sleeve with damper for use with inline fans

    • Use with CVG4 and 4" diameter rigid metal duct
  • Duct Size4"
    Housing Height4-3/16
  • CVLD4 is rated 4.5 out of 5 by 2.
    Rated 4 out of 5 by from Must be oriented vertically This is a good quality damper. Keep in mind that the damper must be oriented vertically to properly close. There is no spring. It relies upon gravity to work.
    Date published: 2012-04-04
    Rated 5 out of 5 by from WORKS WELL JUST HAPPY I WAS ABLE TO GET THE NEEDED PARTS THAT I COULD NOT SEEM TO GET FROMLOCAL DEALERS
    Date published: 2011-05-14
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  • Horizontal mounting

    Can this be mounted in a horizontal position?
    Asked by: Bob
    Thank you for your question on the model CVLD4 four inch sleeve with damper. The damper inside the CVLD4 is a gravity damper and will only work when the unit is installed vertically in a ceiling. If it is mounted in a horizontal position, the damper will open and stay opened.
    Answered by: NuToneCustomerService
    Date published: 2017-03-22

    Does this damper have any seals on the od of the flapper to prevent leakage?

    Asked by: Bob
    Thank you for your question on the model CVLD4 four inch sleeve with gravity damper. The CVLD4 has a rubber gasket material that the damper will rest against, but it does not make an air tight seal.
    Answered by: NuToneCustomerService
    Date published: 2015-09-23

    Will this damper eliminate the flapping, noisy damper on my new ceiling fan-light when the wind is from a certain direction?

    Damper in new bathroom fan/light flaps & is very annoying when the wind blows from the north ; apparently the outlet for the ductwork faces that direction & causes the damper to open & close continuously. Technician at the service center suggested a small piece of foam be added to stop the noise but that would allow more drafts to enter.
    Asked by: Ferd
    Thank you for your question on the model CVLD4. When you have the problem you are describing, we would normally suggest placing a damper on the outside roof or wall cap, where the duct work exits the house. If your fan uses four inch duct work and you can position the CVLD4 in a vertical position, this should correct the problem. Please contact our Technical Service Department at 888-336-6151 to discuss your situation in greater detail.
    Answered by: NuToneCustomerService
    Date published: 2013-10-23
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