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Internet # 202914283

Model # 843BL

Store SKU # 1000947036

Wall Cap for Exhaust Fan or Range Hood with 6 in. Round Duct in Black

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  • Vents exhaust fans or range hoods with a 6 in. duct to outdoors
  • Back-draft damper helps prevent undesirable air backflow
  • Easy to install and/or replace existing product for DIY'ers
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Product Details

About This Product

This Broan Steel Black Wall Cap for Broan 6 in. Round Ducts vents an exhaust fan or range hood with a 6 in. duct to the outdoors. Using its back draft damper helps it to prevent undesirable air backflow. The protective bird screen helps to prevent small pests from entering the duct.


Product Information

Internet # 202914283

Model # 843BL

Store SKU # 1000947036


Dimensions: H 9 in, W 9 in, D 5.5 in


Product Depth (in.)

5.5 in

Product Height (in.)

9 in

Product Width (in.)

9 in


Appliance Category

Appliance Parts

Appliance Type


Brand Compatibility




Color/Finish Family


Compatible Appliance Type

Range Hood

Hardware Included


Model Compatibility

Range Hoods and Bath Ventilation Fans with 6" Round Duct.

Pack Size


Range Hood Part Type

Range Hood Inlet Cap



Warranty / Certifications

Manufacturer Warranty


Questions & Answers

Q:Installing a Broan Elite EW4836SS 400cfm range hood which has a damper already. Is a wall cap also with a damper too restricting to air flow? Will the fan need to run on louder high speeds to kick both dampers open?
by|Oct 28, 2023
1 Answer
Answer This Question

A:  Hi Dave, Thank you for your question on the 843BL. We do recommend a damper at the wall cap to provide an additional barrier for air coming back into the home. Adding this wall cap with a damper will not increase the sound level of the unit and should open both dampers at any speed.

by|Nov 1, 2023
    1 found this answer helpful
    Q:Does this product work for vinyl siding?
    by|Oct 3, 2023
    1 Answer
    Answer This Question

    A:  Hi Jimmy, Thank you for your question on the 843BL wall cap. Yes, it is compatible with vinyl siding.

    by|Oct 3, 2023
      Q:The attachment collar of the 843BL is 1-1/4" long and curves slightly inward at its end. At first glance, this does not look like much to attain a firm connection to. What is the best method to attach the duct to this collar?
      by|Feb 17, 2023
      1 Answer
      Answer This Question

      A:  Hi CBN23, Thank you for your question on the 843BL wall cap. We recommend sliding the duct over and securing with duct tape.

      by|Nov 11, 2023
        Q:I am using a 6" exhaust and venting my hood range through a corrugated tin wall with distance of 7" between ribs. The 843BL height is fine but I need something to fit this 7" range. Is there another model that would help with this?
        by|Feb 12, 2023
        1 Answer
        Answer This Question

        A:  Hi Pawpaw, Thank you for your question on the 843BL wall cap. Unfortunately, we do not offer another wall cap with longer depth for your application.

        by|Feb 13, 2023
          Showing 1-4 of 29

          Customer Reviews

          4.6 out of 5

          • 4.6 out of 111 reviews
          • 76% recommend this product
          Filter by:
          Showing 1-10 of 111 reviews
          The damper does not close properly to stop drafts
          Well built and strong design, but the foam pads glued down the side edges do not match the shape of the damper, so do not seal when the damper is closed. Sloppy cutting of the foam strips. The two pictures show one side with the damper closed and partially open. You can see the wedge shaped gap in the closed position. I can easily get new foam and cut to fit, but should not need to when I paid $48 for this.
          Response from NuToneCustomerSupportSep 27, 2023
          Hi PJNK, Thank you for your feedback on the 843BL Wall Cap. We are sorry to hear you are having an issue. Please call our Product Expert Team at 800-637-1453 so we can try to assist you directly. Broan-NuTone
            Solidly built, tough finish
            I haven't installed this yet. This is not a flimsy vent cap - it would take some serious force to dent. The screen is 1/4" mesh, also fairly sturdy, and mounted inside the external opening. The damper is spring-loaded, and closes against a foam strip so it shouldn't make much noise when closing. It's not clear what CFM is required to push open the damper, but it's not difficult to do so when I try blowing on it.
              • Recommended
              4 found this review helpful
              heavy duty
              this vent cover is great. easy to install and built tough.
                • Recommended
                Not compatible with 6 inch pipe
                Male adapter is way too small female end just doesn’t quite fit. Very disappointing
                Response from Broan-NuTone Customer Experience TeamApr 5, 2024
                Thank you for your feedback on the 843BL. This model is designed for 6" ducting. Please reach out to our Product Support Team at 800-637-1453 for additional assistance.
                  Was installed and day 1,seemed like the right choice. Then unfortunately area wind caused noise with flap and disappointment. Sorry we chose.
                  Response from Broan-NuTone Customer ServiceMar 21, 2024
                  We are disappointed to learn of your experience with the 843BL wall cap. Please give our Product Support team a call at 800-637-1453 or email from the Contact Us page on our website. We can try to offer some suggestions.
                    • Verified Purchase
                    The wall cap was a nice surprise. There is no comparison to its sturdy structure, design functionality or looks. Highly recommend. You won’t be disappointed
                    • Verified Purchase
                    The product came on time and was better than I expected.
                    • Verified Purchase
                    Screen is a joke
                    The screen is a total joke and is held on by 2mm edge of the mesh. You tap it with your finger and the thing falls out of place. Additionally if you dont bend it back oblong the damper will hit and block its opening. This thing is poorly made. Why they didnt just weld the screen in place shows that they dont care about quality or design. My return window as lapsed before I got around to installing. Had I dont so sooner I would of returned this. Don't be fooled by the pictures or fluffy reviews.
                    Response from BroanCustomerSupportDec 21, 2023
                    We are very sorry to learn of your experience with the 843BL wall cap. We would be happy to discuss this with you further. Please reach out to our Product Support team directly at 800-637-1453 for additional support and discussion. Broan
                      Good rigid metal with a nice glossy black finish. Damper works well and comes with a screen to keep birds, etc out. Used for several retrofit projects. Quality product.
                      • Verified Purchase
                      Showing 1-10 of 111 reviews