Chimney Damper Install

I’m looking to add a damper to my chimney. Has anyone tried to use one of these square cast iron dampers or something similar?

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Did you know we offer dampers?
Custom-made for BrickWood Ovens by Duratech, these dampers are designed to fit the same exhaust kits we’ve been selling for over 15 years. They install in under a minute—just press the damper onto the Anchor Plate, then secure the Chimney Cap on top. It’s that simple. Best of all, they help retain over 90% of your oven’s heat.

Chimney Pipe Damper • 6 Inch Double Wall Stainless Steel Damper – BrickWood Ovens