(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 19 TF RETURN BOX 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. • 24 Gauge • 1” flange for return duct connection • 15-1/2” tall • Pre-assembled PLENUM TO ROUND TRANSITION Plenum Size Round 14” 16” 18” 13 1/2” x 20” PLE 14 14 RD 16 1/2” x 20” PLE 17 14 RD PLE 17 16 RD PLE 17 18 RD • 26 Gauge Construction • “S” and drive Connection • 16” Tall
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