Ductmate dri12811ga Insulated Spiral Duct Access Door

Product Description

The DUCTMATE dri12811ga is a sandwich-style insulated access door designed for spiral duct systems. It provides a solid, leak-proof access point for inspection, balancing, and maintenance of air distribution components. Constructed from 22-gauge galvanized steel with fiberglass insulation, the door achieves an R-value of R-2.1 and handles temperatures from -20 to 200 degrees F. The sandwich panel design creates a tight seal that limits air bypass and keeps static pressure loss within rated system tolerances. Licensed HVAC technicians and sheet metal contractors are the primary installers of this component.

This access door is sized for spiral duct runs where the pipe outside diameter falls between 10 and 11 inches. The nominal door size is 12 x 8 inches, with an actual door panel measuring 12-1/2 x 8-9/16 inches and a required wall opening of 11-11/16 x 7-5/8 inches. It is suited for both residential and light commercial duct systems where code-compliant, insulated access is required. Typical installations include supply and return trunk lines, fan coil unit connections, and inline duct sections where periodic access is necessary.

Key Features

• 22-gauge galvanized steel construction resists corrosion in mechanical spaces
• Fiberglass insulation core delivers R-2.1 thermal performance
• Rated for -10 to 20 inches water gauge (in-WG) pressure differential
• Temperature range of -20 to 200 degrees F suits heating and cooling duct applications
• Sandwich panel design provides a leak-resistant seal to minimize uncontrolled air bypass
• Wall opening of 11-11/16 x 7-5/8 inches simplifies field cutting and fitting

Compatibility

Designed for spiral duct systems with a pipe outside diameter of 10 to 11 inches. Fits nominal 12 x 8 inch duct access openings as an OEM-style replacement or new-installation component in insulated spiral duct assemblies.

Installation Notes

Installation should be performed by a qualified HVAC technician or licensed sheet metal contractor in accordance with SMACNA duct construction standards and applicable local mechanical codes. Power down the air handling unit and verify zero static pressure in the duct section before cutting the wall opening. Use aviation snips or a nibbler to cut the 11-11/16 x 7-5/8 inch wall opening cleanly, and deburr all edges before securing the door frame. Do not install this door on duct sections operating outside the rated pressure or temperature range.

Technical Specifications

• Nominal Size: 12 x 8 inches
• Actual Door Size: 12-1/2 x 8-9/16 inches
• Wall Opening: 11-11/16 x 7-5/8 inches
• Fits Pipe Size: 10 to 11 inches
• Pressure Rating: -10 to 20 in-WG
• Temperature Rating: -20 to 200 degrees F
• R-Value: R-2.1
• Gauge: 22 ga
• Material: Steel
• Finish: Galvanized
• Insulation Material: Fiberglass

Standard Information

• Brand: DUCTMATE
• Manufacturer Part Number: dri12811ga