FB dampners

Discussion in 'Reverse Flow' started by joe ny, Jun 22, 2015.

  1. joe ny

    joe ny Fire Starter

    I have a question for you guys.  I am building my FB door and had a question about what FB dampner to use and their placement.  I have 3 round dampners I can use and I see many people make their own slide dampners.  Below I have the 3 with 2 top and 1 below moched up and below that is the inside of the FB.  The FB has a 1.5" flange around the inside of the FB to create a tight seal.  On a side note I will probably use a gasket to create good seal.

    I was also thinking as an alternative to have the 2 round dampners on top and a slide on the bottom.  The top dampners can be mounted on the inside but if I use a round one on the bottom it would need to mounted on the outside.  Any way I go I will have more than enough ventilation.

    I was thinking it might look kinda cool to have 2 round on the top and a slide on the bottom, it would look a little like a jack o lantern when dark out.

    Thanks for your advice,

    Joe


     
  2. locovet

    locovet Fire Starter

    Joe remember you will need more venting on the bottom. I made the same mistake. I think I was told 20% of the venting will be on the top and 80% on the bottom. Someone who knows more will come along and tell you. But I didn't want you to start making cuts yet.
     
  3. joe ny

    joe ny Fire Starter

    Thanks, I don't want to cut yet. I think I can make 80% if I do the slide on the bottom. I can also add 1 or more on the side as well but would like to avoid it if possible.

    Joe
     
  4. daveomak

    daveomak Smoking Guru OTBS Member SMF Premier Member

    locovet is spot on....... 20% top.... 80% bottom will work just fine..... have the bottom air inlets below the fire grate if possible... works better....
     
  5. joe ny

    joe ny Fire Starter

    Thanks Dave, plan is to have the dampners equal to and below the FB grate.

    Joe
     

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