12" x 25' Silver Jacket Flex Duct, R4.2

The JP Lamborn MHP25B-12 flexible air duct is engineered for professional HVAC installations requiring R4.2 thermal insulation and consistent air handling performance. Designed for use in supply and return air systems, this duct combines a reinforced aluminum/polyester core, fiberglass insulation, and a silver vapor barrier jacket for dependable operation within rated pressure and temperature parameters.

Details

• Model: MHP25B-12
• Manufacturer: JP Lamborn
• Equivalent Product: Hart & Cooley Flexible Air Duct, Series: Residential
• Insulation Rating: R4.2
• Jacket Material: Silver vapor barrier, reinforced for mechanical durability
• Core Construction: Multi-layer aluminum/polyester laminate with a corrosion-resistant steel wire helix
• Inside Diameter: 12 inches
• Length: 25 feet
• Maximum Air Velocity: 5000 FPM
• Temperature Range: -20°F to 140°F (-29°C to 60°C)
• Pressure Rating: Designed for standard residential static pressure systems
• Application: Supply and return air distribution in residential and light commercial HVAC systems
• Standards/Compliance: UL 181 Class 1 Air Duct, NFPA 90A/90B, ASTM E84 Flame and Smoke
• Part Number: 2036757

Summary

The JP Lamborn MHP25B-12 R4.2 flexible insulated duct provides HVAC contractors with a durable, UL 181-compliant solution for standard air distribution systems. Its silver vapor barrier jacket and reinforced core deliver mechanical strength and insulation efficiency within rated performance limits for residential and light commercial applications.