8" x 25' Silver Jacket Flex Duct, R6

Product Overview

The JP Lamborn MHP25R6B-08 Flexible Air Duct is an R-6 insulated air distribution component designed for residential and light commercial HVAC systems. Constructed with a durable silver vapor-barrier jacket and a wire-reinforced core, this duct delivers reliable airflow, thermal efficiency, and mechanical flexibility for both supply and return applications. The duct is engineered to maintain consistent performance under rated air velocities and temperature ranges while meeting applicable mechanical and energy code requirements.

Technical Specifications

• Model: MHP25R6B-08
• Manufacturer: JP Lamborn (Hart & Cooley)
• Series: Residential
• Product Type: Insulated Flexible Air Duct
• Inside Diameter: 8 inches
• Length: 25 feet
• Insulation Value: R-6
• Outer Jacket: Silver vapor-barrier jacket for moisture resistance and durability
• Air Velocity Rating: 5000 fpm (maximum)
• Temperature Range: -20°F to 140°F (-29°C to 60°C)
• Core Construction: Helically wound, wire-reinforced inner core
• Insulation Type: Thermal fiberglass blanket with vapor barrier
• Application: Supply and return air distribution for residential and light commercial HVAC systems
• Compliance: UL 181 Class 1 Air Duct; conforms to NFPA 90A and 90B requirements
• Installation: Suitable for use in conditioned and unconditioned spaces per mechanical code

Professional Notes

Install per JP Lamborn and SMACNA installation standards to ensure optimal performance and code compliance. Fully extend duct runs to reduce friction loss and support at appropriate intervals to prevent sagging. All connections must be sealed using UL 181-approved tape or mastic to maintain system efficiency. Avoid compression, sharp bends, and mechanical damage during installation to preserve insulation value and airflow characteristics.

Summary

The JP Lamborn MHP25R6B-08 Flexible Air Duct is an 8-inch diameter, 25-foot insulated duct with an R-6 thermal rating and silver vapor-barrier jacket. Rated for 5000 fpm air velocity and -20°F to 140°F operation, it provides a durable, code-compliant solution for professional HVAC air distribution installations.