(877) 620-8258 mfgquote@gensco.com H V A C S H E E T M E T A L & S P E C I A L T Y P R O D U C T S 20 ADDITIONAL PRODUCTS Size Description CE 17 16 17” x 17” Base transitions 90 degrees into a 16” round for slab penetration from garage into crawl space CE 17 18 17” x 17” Base transitions 90 degrees into a 18” round for slab penetration from garage into crawl space CEMENT ELBOW Size Description D BOX Air distribution box w/tapered design, 16” round Supply that distributes into 5” - 8” holes and 3” - 6” holes for takeoffs DISTRIBUTION BOX • 26 Gauge • Used in attic or crawl applications • 6” wide collar TB RETURN BOX RETURN BOX Size Description TB RB 30 Return air base box for up to 30” wide furnaces. Pre-Cut 8”x24” opening for return duct. 10” tall, preassembled with support brace. Accommodates 16”x25”x1” filter. TB RB 38 Return air base box for up to 26” wide furnaces. Pre-Cut 10”x25” opening for return duct. 10” tall, preassembled with support brace. Accommodates 20”x25”x1” filter. • 26 Gauge • 1” flange for return duct connection • 10” tall • Pre-assembled Size Description TF RB 30 Return air base box for up to 20” wide furnaces. Pre-Cut 8”x24” opening for return duct. 15-1/2” tall, preassembled with support brace. Accommodates either a 16”x25”x1” or 16”x25”x4” pleated filter. TF RB 38 Return air base box for up to 26” wide furnaces. Pre-Cut 12”x25” opening for return duct. 15-1/2” tall, preassembled with support brace. Accommodates either a 20”x25”x1” or 20”x25”x4” pleated filter. • 26 Gauge • 1” flange for return duct connection • 15-1/2” tall • Pre-assembled
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