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
Insulated round duct section for 12 13 14 inch diameters, galvanised steel with fiberglass wrap

Ductmate

Ductmate GRDRI12814GA insulated round duct 12 13 14

SKU CH-ECT5-QYP9P

Insulated round duct access door fits 12, 13, 14 inch ducts with fiberglass insulation and steel construction rated to 200 degrees Fahrenheit

  • Insulated for thermal efficiency with fiberglass material
  • Fits 12, 13 and 14 inch duct diameters
  • 22 gauge steel construction for durability
  • Rated to 200 degrees Fahrenheit maximum temperature
  • Rectangular access door with knob latches for easy entry

Insulated Round Duct Access Door

The Ductmate GRDRI12814GA is a sandwich-style insulated round duct access door built for HVAC systems requiring inspection or cleaning points. It fits nominal duct diameters of 12, 13 and 14 inches and uses a 22-gauge steel construction with fiberglass insulation. The door measures 12 inches wide by 8 inches high with a 7/8-inch thickness. It is rated for a maximum temperature of 200 degrees Fahrenheit.

Installation Notes and Common Issues

The unit mounts with two studs that are 2 inches long, secured by knob-style latches and no hinges. Installers must cut a precise rectangular opening in the duct wall to match the 12-by-8-inch door frame. A frequent problem is compressing the fiberglass insulation unevenly, which creates thermal bridges and air leakage. The knob latches can loosen over time if vibration is present, so periodic re-tightening is advised.

Practical Limits of the Duct Interface

This access door is not fire-rated, so it cannot satisfy code requirements for rated duct penetrations. The 200-degree Fahrenheit temperature ceiling restricts use to standard heating and cooling cycles; it is unsuitable for high-temperature exhaust or industrial process ducts. The design accommodates only the three listed nominal diameters, so it will not seal correctly on smaller or larger round duct sizes.

Highlights

  • Insulated for thermal efficiency with fiberglass material
  • Fits 12, 13 and 14 inch duct diameters
  • 22 gauge steel construction for durability
  • Rated to 200 degrees Fahrenheit maximum temperature
  • Rectangular access door with knob latches for easy entry

Specifications

BrandDUCTMATE

Questions about this item

How can I verify the duct access door is sealing properly after installation?

Check that the two mounting studs sit flush and the knobs latch tightly; the fiberglass insulation should compress evenly around the 12, 13 or 14 inch nominal duct diameter with no visible gaps.

What components are included and what must be sourced separately?

The door panel, two 2‑inch mounting studs and knob latches are supplied; ductwork, sealant and any framing hardware are not included.

Which nominal duct diameter should I select for my 13‑inch round duct?

Choose the 13‑inch option; the door is sized for 12, 13 or 14 inch nominal diameters, so match the door to your duct’s exact size.

Also in this aisle

People compared these

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