SECTION 15290-DUCTWORK INSULATION

RIGID EXPANDED POLYISOCYANURATE - DOW TRYMER 2000 OR EQUAL. Insulation: ASTM C591; rigid, noncombustible board. ‘K’ (‘Ksi’) Value: ASTM C518, 0.168 at 75 deg F. Maximum service temperature: 250 deg F. Maximum moisture absorption: 0.20 percent by volume. Flame Spread/smoke developed: 25/50. Vapor Barrier Jacket: ................
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