secondary air tubes

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    Drolet Heat Commander secondary burn...

    Good day everyone, This is my second season of using my Drolet Heat Commander. I had a two story home with the unit in the basement (obviously), so, 3 levels all together. I am starting to think I am over-drafting as I rarely get good secondary burns out of the unit. The baffles are pushed...
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    Mansfield 8011 secondary air tubes

    I’m rebuilding a mansfield that came with my home purchase and the secondary manifold Has a blow out and the tubes are completely missing. I’m welding the manifold and making tubes but I need to know the size of the holes and how many per tube? A picture of some ones current Mansfield secondary...