The assembly features a sheet metal duct lined with 1-inch black acoustical insulation and integrated into a ceiling system. A volume damper is installed in the duct run, and the connection utilizes a neck sized per the engineering schedule. Notes provide instructions for sizing and system integration.
Text on the drawing
1" BLACK ACOUSTICAL LINER VOLUME DAMPER CEILING 1. SHEET METAL DUCT. SEE PLANS FOR SIZE. 2. NECK SIZE PER SCHEDULE. 3. EXTEND AND CONNECT TO RETURN/EXHAUST SYSTEM. NOTES: 1 2 3
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