The 0800 Sequence is out there in two frame models for use with steel duct: a double flange screw gap mounting form (M1) or simply a knock-above tab style (M2). Each variations include a simple installation Lower-out template that makes the oval shape openings excess straightforward to cut. Every device https://stephenyrfsg.bloggazza.com/35967187/the-fact-about-dampers-for-industrial-sector-that-no-one-is-suggesting