14" x 25' Silver Jacket Flex Duct, R6

Product Overview

The JP Lamborn MHP25R6B-14 Flexible Air Duct is an R-6 insulated air distribution component designed for residential and light commercial HVAC systems. Constructed with a wire-reinforced inner core, fiberglass insulation, and a durable silver vapor-barrier jacket, this duct provides reliable airflow, thermal efficiency, and flexibility for both supply and return applications. The MHP25R6B-14 meets UL, NFPA, and SMACNA standards for flexible duct construction and installation, ensuring consistent performance and code compliance.

Technical Specifications

• Model: MHP25R6B-14
• Manufacturer: JP Lamborn (Hart & Cooley)
• Series: Residential
• Product Type: Insulated Flexible Air Duct
• Inside Diameter: 14 inches
• Length: 25 feet
• Insulation Value: R-6
• Outer Jacket: Silver vapor-barrier jacket providing moisture resistance 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 for 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 per mechanical code requirements

Professional Notes

Install in accordance with JP Lamborn and SMACNA flexible duct installation standards. Ensure all duct sections are fully extended during installation to minimize static pressure losses and maintain airflow performance. Support ducts at regular intervals to prevent sagging and insulation compression. Seal all joints and fittings using UL 181-approved mastic or tape for airtight connections. Avoid sharp bends, compression, or mechanical deformation to maintain structural integrity and thermal efficiency.

Summary

The JP Lamborn MHP25R6B-14 Flexible Air Duct is a 14-inch diameter, 25-foot R-6 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 air distribution performance for professional residential and light commercial HVAC installations.