Mr. Brenn i would not be able to sleep at night knowing that the item that is saving my furnace from over firing is high temp duct tapeOK, I went downstairs to make my plate and after removing the damper door, I realized this is gonna be really simple. No sense in making this more difficult than it needs to be (like I did with my SS firebox shields a couple pages back)
The factory intake holes are already 1" tall and the center hole is already 2.5" x 1" so only hafta restrict the side holes. I used some high temp aluminum duct tape...
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