Certainteed 660948 Duct Wrap 2x48 Inch 75 Ft Hvac

Product Description

The CERTAINTEED 660948 is a fiberglass duct wrap insulation blanket designed for wrapping rectangular and round sheet metal ductwork in heating, ventilating, and air conditioning systems. Measuring 2 inches thick by 48 inches wide and 75 feet long, this roll provides substantial coverage for commercial and residential duct insulation projects. It is rated for continuous service from 35 degrees F up to 250 degrees F, making it suitable for both supply and return air duct applications. Licensed HVAC contractors and sheet metal mechanics install this product as part of new construction and retrofit insulation work.

This duct wrap is appropriate for use on HVAC supply and return ducts in residential and light commercial installations. Its 48-inch width accommodates a wide range of duct sizes without requiring multiple strips on larger duct faces. The 75-foot roll length reduces seam count on long duct runs, improving thermal performance and installation efficiency. It is intended for use on systems operating within standard HVAC temperature ranges and meets the requirements of multiple industry and building code standards.

Key Features

• 2-inch thickness provides thermal insulation for HVAC ductwork across standard operating temperature ranges
• Temperature rated from 35 degrees F minimum to 250 degrees F maximum for reliable performance in heating and cooling applications
• 48-inch width and 75-foot roll length reduce seams and material waste on long duct runs
• Tested for water vapor sorption, corrosiveness, fungi resistance, and odor emission
• Meets UL 723, multiple ASTM standards, and CAN/ULC-S102 for fire, thermal, and fungi performance

Compatibility

Designed as an OEM-style duct insulation wrap for residential and commercial HVAC duct systems operating within heating, ventilating, and air conditioning applications.

Installation Notes

Duct wrap insulation is installed by licensed HVAC contractors or sheet metal mechanics in accordance with local mechanical codes and SMACNA guidelines. The duct system should be de-energized and the air handler shut down before beginning insulation work on active ductwork. Secure the wrap with approved staples, outward-clinching staples, or UL 181-rated tape at all seams and edges to maintain vapor retarder integrity. Do not compress the insulation below its rated thickness, as compression reduces effective R-value.

Technical Specifications

• Thickness: 2 inches
• Width: 48 inches
• Length: 75 feet
• Maximum Temperature Rating: 250 degrees F
• Minimum Temperature Rating: 35 degrees F
• Application: Heating, Ventilating and Air Conditioning System
• Tested Properties: Water Vapor Sorption, Corrosiveness, Fungi Resistance, Odor Emission
• Applicable Standards: UL 723, ASTM C411, C665, C1338, C1304, E136, E96, E84, C1104, CAN/ULC-S102

Standard Information

• Brand: CERTAINTEED
• Manufacturer Part Number: 660948