I need to install a Honeywell 10×10 damper into a 11×11 duct.
Options that I came up with:
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build an adapter to reduce duct to 10×10 (alternatively I can use 12×12 damper and build adapter to enlarge duct to 12×12). (Honeywell dampers come in even sizes only).
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Fill the gap with some sort of a frame made out of (circle one): metal, foam, wood.
Best Answer
I would go over sized rather than undersized if you have the room to do it. An undersized unit will limit your maximum flow, unless you always will be reducing the flow to that area then go undersized. Strips of ducting can be purchased at most home stores that you can rivet from one side to the other then use a good quality duct tape to seal. They make a tool to bend the sheet metal makes nice easy bends. Hope this helps.