437Roof Cap for High Capacity Fans up to 1200 CFM, in Black

  • Overview
  • Specifications
  • Reviews
  • Answers
  • Maximize the air and sound performance of your Broan ventilation fan or range hood using one of our wide variety of ducting accessories.

    • Footprint is 27-1/4" wide x 18-1/2" deep and designed for use with fans up to 1200 CFM, providing the right roof cap for use with high performance blower systems
    • A built-in, spring-loaded backdraft damper and bird screen provide a dependable roof cap you can count on
    • Roof cap is made of 24 gauge CRCQ steel construction with a black primer finish for durability and long life
    • For use with Range Hoods, LoSone Fans and Bath Ventilation Fans
    • Sold as 1 to a carton
    • Not recommended for installation on a flat roof
  • 437 is rated 3.0 out of 5 by 2.
    Rated 2 out of 5 by from Broan 437 duct roof cap Disappointed in the quality and engineering of the critter screen, and how it is retained. It was curled and we could not get it to seat properly without having to make a jig and clamp it in position. We then bonded it to the sides of the opening with silicone to form an effective retainer.
    Date published: 2011-05-24
    Rated 4 out of 5 by from As advertised but needed adjustment Original roof cap my builder installed was under-sized for Broan outdoor vent hood and blower rated at 1000 CFM. I was getting a lot of blowback into the attice above my lanai. The 437 was the right fix. The unit breaths alot better and is quieter. The unit arrived with a couple of the sheet metal corners alittle bent and the damper kept getting hung up on the screen. After a few minor adjustments, it works fine.
    Date published: 2011-05-19
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  • Broan 437 has a square opening and the 10" conduit is round...

    You said that the roof cap just sits on top of the conduit and a transition piece is not needed... However, the conduit is 10" round and the 437 Cap inlet is square.... How does this work? How is it connected? This doesn't seem right....
    Asked by: Joe
    Thank you for your question on the model 437 roof cap. Please give our Technical Support Department a call so we can speak to you directly about the installation. Technical can be reached at 800-637-1453.
    Answered by: BroanCustomerService
    Date published: 2018-02-28

    Will this cap prevent driving rain from entering?

    The opening of the cap appears to be facing the side rather than facing down. My concern is that wind driven rain will be forced into the cap.
    Asked by: FL Gulf
    Thank you for your question on the model 437 roof cap for high capacity fans. The 437 is designed to be installed on sloped (not flat) roofs and the opening should be pointing down. Since this unit has a built-in spring-loaded backdraft damper, it should help keep water out, but since it is not installed properly, you may have leakage. Please contact the Technical Service Department at 800-637-1453 if you need further assistance.
    Answered by: BroanCustomerService
    Date published: 2016-08-26

    What is the correct Transition Piece for this?

    What is the correct Transition Piece for this? I am trying to connect a 10" galvanized conduit to this and need the transition piece. Thanks
    Asked by: Joe
    Thank you for your question on the Broan 437. No transition needed to connect your 10" duct to the 437. The rood cap sits over the top of your ducting. If you have further questions please contact our Technical Support directly at 800-637-1453.
    Answered by: BroanCustomerService
    Date published: 2017-05-11

    Does this roof cap come in copper or stainless steel?

    Asked by: Marty
    Thank you for your question on the model 437 roof cap. The 437 roof cap only comes in a black electrically-bonded epoxy finish on 24 gauge CRCQ steel. It is not available in copper or stainless steel.
    Answered by: BroanCustomerService
    Date published: 2016-03-04

    What size opening on the bottom of the Cap? IE: what size pipe can you vent with this cap?

    Asked by: Jet
    The opening is 10.5 X 10.5 Can use up to 10” round pipe.
    Answered by: BroanCustomerService
    Date published: 2013-10-23
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