METALIZED AIR DUCT

V-250-UL \ V-250-S-UL

Description
UL 181 Listed, Class 1 Air Duct. Identical to Metalflex® V-200-UL/ V-200-S-UL except with a reinforced, high performance, metalized vapor barrier.

Features
• Inner core is 100% corrugated Metalflex® with water tight seams.
• Meets all requirements of UL 181 and is listed as a Class 1 Air Duct in accord with NFPA 90b & 90b.
• Fire Hazard Classifications -
Flame Spread not exceeding 25.
Smoke Developed not exceeding 50.
• Thermal Efficiency -
C factor calculated at 75° F mean = .173
R-Value = 5.79 Avg. (ADC FD72-R1)
4.20 Avg. (ASTM C-518)
• Metalized vapor barrier has low .05 Perm rating.
• Will not droop or sag between 6' supports.

PERFORMANCE STANDARDS

Maximum Velocity: – 5000 FPM
Maximum Operating Pressures:
POSITIVE AND NEGATIVE -
4" - 10" Diameters – ± 12" W.G.
12" - 20" Diameters – ± 8" W.G.
Operating Temperature Range:
20° through + 250° F.