Grease duct joints are held alongside one another by the use of formed V clamps and sealed with 3M Fire Barrier 2000+. Suited to indoor use without the need of additional environmental security UL 2221 - less than this listing, the Jeremias ZC versions have been determined well suited for https://fire-resisting-ductwork-i13345.ja-blog.com/37054733/the-smart-trick-of-fire-resisting-ductwork-insulation-that-nobody-is-discussing