636Roof Cap, Black, 3" or 4" Round Duct

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  • For 3" or 4" round duct.
    • Built-in backdraft damper and bird screen
    • Steel baked black enamel finish
  • (8 Questions : 8 Answers)

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    636 meet code for roof DRYER venting

    Age: 55-64
    Gender: Male
    1 year ago
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    Deb
    Mi
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    Answer: 
    Thank you for your question on the model 636 roof cap. It may be used to vent a clothes dryer, in most cases, as long as the bird screen is removed, since lint build-up on the screen could pose a safety hazard. .
    1 year ago
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    Why would I pick one over the other?
    3 months, 3 weeks ago
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    Ottawa
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    Answer: 
    Thank you for your question on the 636 and 636AL roof caps. They are both the same product. One is a steel baked black enamel finish and the other has an aluminum natural finish.
    3 months, 3 weeks ago
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    50 homeowners in a duplex condo development are evaluating a roofing replacement proposal. The roofer has specified Broan but not a model, only describing it as a "Broan louvered vent." Current bathroom fans (2-3 per unit) are vented to attics with soffit and ridge vents. Proposal is to combine exhaust ducting and vent through single openings in the reshingled roofs. Units are about 30 years old, so some original bath fans have been replaced by owners. Is this the normal roof cap model for home situations in Ohio? We want assurance against water and animal incursions, but are concerned that louvered models that might require high maintenance or extraordinary CFM fans.
    Age: Over 65
    Gender: Male
     
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    1 month, 2 weeks ago
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    Condo Owner
    Cincinnati, OH, USA
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    Answer: 
    Thank you for your question on the roof caps. A four inch roof cap can handle up to 110 CFM using rigid duct work and with the duct run short enough. When you combine (2) four inch ducts, you need to enlarge the duct to six inch diameter. Combining (3) four inch ducts, you would need to enlarge the duct to a seven inch diameter and so on. Combining ducts from several fans can also cause air to feed back into bathrooms where the fan is not on. Please contact the Technical Service Department at 800-637-1453 for further assistance.
    1 month, 1 week ago
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    I have a vertical vent pipe that goes 2-3 feet above the roof. issue is that I get a back draft into house (it lets smells from outside in as well). I understand this vent cover has a check valve (true?). can I switch over to your vent cover by installing only from roof? or do I need to get attic access to tape joints, etc from the bottom?
    Age: 45-54
    Gender: Male
    3 weeks, 3 days ago
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    Mike
    Montgomery, OH, USA
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    Answer: 
    Thank you for your question. The 636 roof cap incorporates both a "back-draft" damper, as well as a bird screen. Based on your description, I believe that you will be able to install from the roof side, by attaching,sealing and placing the flashing under the shingles from the roof side. If you have questions, please contact the Broan Technical Support group at 800-637-1453.
    3 weeks ago
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    problem with rain getting into

    I have this 636 exhaust fan when the rain comes n the right direction it bounces off roof into the fan. In turn it leaks into my bath , how can I create a extension to install on unit to stop this.
    Age: 55-64
    Gender: Male
    1 week, 5 days ago
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    Mickey52
    Chicago, IL, USA
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    Answer: 
    Thank you for your question on the model 636 roof cap. If the 636 is installed and working properly, it would be very difficult for rain to get into the duct work. Please contact the Technical Service Department at 800-637-1453 for assistance.
    1 week, 4 days ago
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