18X25 R4 SILVERFOIL FLEX DUCT
UPC 030 18R4

Product #: 47026325178

Volume: 25

Description

Flexible Duct System; Type Class 1, Plain End; Insulation Type R4; Burning Character Maximum Flame Spread 25, Maximum Smoke Developed 50; Air Velocity 5000 FPM; Rated Positive Pressure 4 Inch WC; Rated Negative Pressure 3/4 Inch WC; Jacket Material Tough Reinforced Metalized Polyester; Core Material Double Lamination Tough Polyester with Steel Wire Helix; Length 25 Foot; Width 18 Inch; Temperature Rating -20 to 140 Deg F; Applicable Standard UL 181, ASTM C518, NFPA 90A/90B, ADC; Insulating Material Thick Blanket Fiberglass; For Low to Medium Operating Pressure in HVAC System

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