644Roof Cap in Natural Aluminum Finish

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  • 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 18-3/4" long x 14-1/4" wide for a well-balanced fit
    • Designed to fit with 3-1/4" x 10" or up to 8" round duct for flexible installation
    • A built-in, backdraft damper and bird screen provide a dependable roof cap you can count on
    • Roof cap is made of 24 gauge CRCQ steel construction in a .025 natural Aluminum finish for durability and long life
    • For use with Range Hoods, LoSone Fans and Bath Ventilation Fans
  • Rated 4.3 out of 5 by 3 reviewers.
    Rated 3 out of 5 by Ok for the price Unit arrived bent up on several corners. This probably due to the fact that its made of very, very thin alum. Fortunately though, easy to bend back it's so thin. Live near the coast so needed alum since galvanized still would rust, but would have gotten a thicker gauge. Also, its opening was a generic, psuedo square shape obviously to fit many different sizes and shape ducts, but would have preferred a 7-8" round collar/opening for a tighter fit/connection. Otherwise works well. September 15, 2012
    Rated 5 out of 5 by Good Product Ordered two Broan vent caps - one for a new vent and one to replace a similar unit that was damaged during a roof replacement. These function better than the old one ever did and the bird screen is a welcome feature. The only negative is that the noise of the damper closing is rather loud, but we will get used to it. August 22, 2011
    Rated 5 out of 5 by Good Product This aluminum vent is vast improvement over the steel Sears vent I installed 30 years ago, which started leaking in the midst of Hurricane Alex. The only problem would be the shipping: it arrived crinkled and bent. August 17, 2010
    • 2015-08-31T08:49:33.965-05:00
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  • (5 Questions : 5 Answers)

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    Broan model 644 Aluminum Roof Cap

    1. I have a 6" round vent pipe. Will it work with this model? If so, how is it attached? 2. Photo shows that this model has a Black Epoxy paint finish....True?...False?
    1 year, 10 months ago
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    Jerry
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    Answer: 
    Thank you for your question on the model 644 aluminum roof cap. The 644 is designed to be used with 3-1/4” x 10” rectangular or up to 8” round duct work. The duct work will come up through the roof and stick up approximately 1” above roofing material. The 644 will attach to the roof over the top of the duct work. The duct work does not actually attach to the roof cap. The 644 has a back draft damper and bird screen. This unit is made from aluminum and has a natural aluminum finish. The Broan model 634M is our roof cap for 6" round duct. This may be a better option for you. For further assistance please contact the Technical Service Department at 800-637-1453.
    1 year, 9 months ago
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    I want to merge a few powered bathroom exhaust fans through this 644 roof cap. Will that work properly on a low slanted gable roof? Are there any issues I need to know about?
    Age: 55-64
    Gender: Male
    1 year, 6 months ago
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    RP
    Naperville
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    Answer: 
    Thank you for your question on the model 644 roof cap. This roof cap is capable of venting 3-1/4” x 10” rectangular duct work or up to 8” round duct work. It can be used on slated roofs with a minimum of a 2/12 pitch. We do recommend that each ventilation fan have its own duct work.
    1 year, 6 months ago
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    What CFM ranges can this roof cap handle?

    Age: 35-44
    Gender: Male
    1 year ago
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    Michael
    USA
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    Answer: 
    Thank you for your question on the model 644 roof cap. The amount of CFM that can be run through the 644 would be dependent on the type, size and length of duct work in the installation. Normally you could run 400 – 500 CFM through it. Please contact the Technical Service Department at 800-637-1453 for further assistance.
    1 year ago
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    Do you have any 22 gauge roof caps?

    Age: 35-44
    Gender: Male
    4 months, 2 weeks ago
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    Project manager
    Brooklyn, NY, USA
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    Answer: 
    Thank you for your question on the roof caps. The model 644 is 0.25 aluminum. The 634 is the same size but is black and uses 24 gauge cold rolled steel. Please contact Technical with further questions at 800-637-1453.
    4 months ago
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    4000 series

    which 40000 series will be good for the 644 roof cap?
    Age: 55-64
    Gender: Male
    3 months, 3 weeks ago
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    kevin
    home
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    Answer: 
    Thank you for your question on the model 644 roof cap. The 644 roof cap is designed to fit any exhaust fan or range hood that requires 3-1/4" x 10" rectangular or up to 8" round duct. Please contact the Technical Service Department at 800-637-1453 if you need further assistance.
    3 months, 3 weeks ago
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    • 2015-08-31T08:51:18.109-05:00
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    • 2015-08-31T08:51:18.112-05:00
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