8" x 25' Silver Jacket Flex Duct, R8

Product Overview

The JP Lamborn MHP25R8B-08 Flexible Air Duct is an R-8 insulated duct assembly designed for high-efficiency residential and light commercial HVAC applications. Built with a reinforced inner core, fiberglass insulation, and a silver vapor-barrier jacket, this duct provides superior thermal performance and air delivery characteristics. Suitable for both supply and return air systems, it ensures compliance with UL, NFPA, and SMACNA standards for flexible air distribution installations.

Technical Specifications

• Model: MHP25R8B-08
• Manufacturer: JP Lamborn (Hart & Cooley)
• Series: Residential
• Product Type: Insulated Flexible Air Duct
• Inside Diameter: 8 inches
• Length: 25 feet
• Insulation Value: R-8
• Outer Jacket: Silver vapor-barrier jacket for moisture protection and mechanical 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: Fiberglass blanket insulation with polyethylene vapor barrier
• Application: Supply and return air distribution in residential and light commercial HVAC systems
• Compliance: UL 181 Class 1 Air Duct; conforms to NFPA 90A and NFPA 90B standards
• Installation: Approved for use in conditioned and unconditioned spaces in accordance with mechanical code requirements

Professional Notes

Install in accordance with JP Lamborn and SMACNA flexible duct installation guidelines. Fully extend all duct sections to minimize static pressure loss and maintain design airflow. Provide proper support at intervals to prevent sagging and insulation compression. All joints and fittings must be sealed using UL 181-approved tape or mastic to ensure airtight performance. Avoid sharp bends, kinking, or compression to preserve airflow capacity and insulation integrity throughout the system.

Summary

The JP Lamborn MHP25R8B-08 Flexible Air Duct is an 8-inch diameter, 25-foot R-8 insulated duct with a silver vapor-barrier jacket. Rated for 5000 fpm airflow and -20°F to 140°F operation, it provides durable, thermally efficient, and code-compliant performance for professional HVAC air distribution installations.