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FIBROUS GLASS INSULATED HVAC DUCT SYSTEMS
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The fibrous glass duct system is normally made up of nominal four foot (1.2m) modules which are fabricated from 1, 11/2, or 2 in. (25, 38, or 51mm) thick, flat fibrous glass duct board stock having a factory-applied reinforced aluminum exterior air barrier finish. Duct system modules are fabri...
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