We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Ductmate insulated round duct section with rectangular access door, steel finish

Ductmate

Ductmate GRDRI846GA insulated round duct

SKU CH-TX20-M7JAB

Sandwich-style insulated round duct with 22-gauge steel construction and fiberglass insulation rated to 200 degrees Fahrenheit

  • Insulated construction with fiberglass reduces thermal loss
  • Steel body in 22 gauge resists deformation
  • Rectangular access door 8 by 4 inches allows easy entry
  • Knob latch secures the door without tools
  • Rated for 200 degrees Fahrenheit maximum temperature

Ductmate GRDRI846GA Insulated Round Duct

This sandwich-style insulated round duct is designed for HVAC systems requiring thermal protection and controlled airflow. It serves installers and maintenance teams working on residential or commercial ductwork where temperature retention matters. The steel construction with fibreglass insulation suits supply or return lines up to the rated limits.

Installation Notes and Common Issues

The access door measures 8 inches wide by 4 inches high with a 7/8 inch thickness and mounts using two 2-inch studs secured by knobs. A rough opening of 3 7/8 inches high is required. Misalignment of the studs or an undersized opening are the most frequent causes of air leakage or door binding during fitment.

Temperature and Diameter Constraints

The assembly carries a maximum temperature rating of 200 degrees Fahrenheit and fits nominal duct diameters of 5 inches and 6 inches. Operation above the rated temperature or on ducts outside the stated range will compromise the seal and insulation performance. The 22 gauge steel shell provides structural rigidity within these limits.

Highlights

  • Insulated construction with fiberglass reduces thermal loss
  • Steel body in 22 gauge resists deformation
  • Rectangular access door 8 by 4 inches allows easy entry
  • Knob latch secures the door without tools
  • Rated for 200 degrees Fahrenheit maximum temperature

Specifications

BrandDUCTMATE

Questions about this item

How can I verify the insulated round duct is performing correctly after installation?

Check that the 22 ga steel door sits flush in the 3 7/8 in rough opening, the knobs latch securely, and airflow remains steady at temperatures up to 200 °F.

What components are included with the GRDRI846GA and what must be purchased separately?

The unit ships with the insulated access door, two 2 in mounting studs, and fiberglass insulation; duct sections, sealant, and hanging hardware are sold separately.

Which nominal duct diameter should I select for the GRDRI846GA?

Choose the 5 in or 6 in nominal diameter that matches your existing round ductwork; the door dimensions are fixed at 8 in wide by 4 in high.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.