646Wall Cap, White Plastic Louvered, 6" Round Duct

  • Overview
  • Specifications
  • Reviews
  • Answers
  • For 6" round duct.
    • White polymeric
  • 646 is rated 4.7 out of 5 by 3.
    Rated 4 out of 5 by from Should help keep insects out We had a problem with wasps or hornets coming in through our bathroom fan ducts. These flappers closed by gravity should help eliminate that problem. The 6+" long (nice!) thin metal fitting attached to the plastic exterior has a tendency to pull out of the plastic face when it is being slipped into the long exhaust pipe. That can make it awkward when working in a cramped attic, having to pull the inside pipe back out of the exhaust pipe, re-align both, then couple the thin inside metal fitting to the exterior plastic face. Once installed, the exterior has a clean appearance, with the fan's air movement easily opening the flaps. How well those flaps work through cold Chicago suburb winters remains to be seen.
    Date published: 2012-04-18
    Rated 5 out of 5 by from Another first timer Easy company to shop from, delivery came quickly. Product dimensions shown in sketch were accurate. The thin gauge sheet metal duct on the back could be easily snapped on or off. There was a bird guard behind the louvers to keep out birds/squirrels. I didn't like the white color so I spray painted it to match my house siding.
    Date published: 2010-06-16
    Rated 5 out of 5 by from First time with Vent Dir My total experience was fantastic. The ordering was easy and the product was delivered early. I would highly recommend this company and will use them again.
    Date published: 2009-11-13
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  • Wall cap dimensions

    Just trying to confirm if this is the same as what I presently have installed, would you have the dimensions for one of the three flaps?
    Asked by: FredF
    Thank you for your question on the model 646 wall cap. The outside dimension of the 646 wall cap is eight inches square. Please contact the Technical Service Department at 800-637-1453 for further assistance.
    Answered by: BroanCustomerService
    Date published: 2016-07-20

    does this 646 come with a bird screen?

    Asked by: diane
    Thank you for your question on the model 646 wall cap. The 646 does not have a bird screen. The closest similar wall caps that do have a bird screen would be model 843BL and 641.
    Answered by: BroanCustomerService
    Date published: 2015-05-05
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