Text on the drawing
15DEG INCL. ANGLE MAX 30DEG INCL. ANGLE MAX 15DEG INCL. ANGLE MAX 30DEG INCL. ANGLE MAX SOUND ATTENUATOR 3 EQUIVALENT DIA. MINIMUM TO MAINTAIN NOMINAL RATED PRESSURE DROP 3 EQUIVALENT DIA. MINIMUM TO MAINTAIN NOMINAL RATED PRESSURE DROP 3 EQUIVALENT DIA. MINIMUM TO MAINTAIN NOMINAL RATED PRESSURE DROP 3 EQUIVALENT DIA. MINIMUM TO MAINTAIN NOMINAL RATED PRESSURE DROP SOUND ATTENUATOR HORIZONTAL BAFFLES PARALLEL TO PLANE OF INLET ELBOW HORIZONTAL INLET ELBOW 7.5 DEGREE MAX (TYP) PLAN VIEW WITH HORIZONTAL BAFFLES DUE TO HORIZONTAL INLET ELBOW PLAN VIEW WITH VERTICAL BAFFLES DUE TO VERTICAL INLET ELBOW VERTICAL BAFFLES PARALLEL TO PLANE OF INLET ELBOW 4-WAY OR ROUND-RECT. TRANSITION AS REQUIRED. MAINTAIN MAXIMUM 15 DEGREE INCLUDED ANGLE (7.5DEGREE PER SIDE)(TYP.) 4-WAY OR ROUND-RECT. TRANSITION AS REQUIRED. MAINTAIN MAXIMUM 30 DEGREE INCLUDED ANGLE (15 DEGREE SLOPE)(TYP.) NOTES: 1.ATTENUATOR INTERNAL BAFFLES TO BE PARALLEL TO PLANE OF INLET ELBOW. 2. ATTENUATORS ARE TYPICALLY LARGER THAN CONNECTED DUCTWORK AND MAY REQUIRE 4-WAY INLET AND DISCHARGE TRANSITIONS. 3.CONTRACTOR TO PROVIDE ALL MOUNTING AND CONNECTION HARDWARE AND DETAILS NECESSARY. NO SCALE 6 SOUND ATTENUATOR
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