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Rectangular steel duct access door with thumbscrew latches

Ductmate

Ductmate GRDR849F2GA hvac control

SKU CH-95ZN-J2V4X

A steel duct access door rated to 300 degrees Fahrenheit with 22-gauge thickness and thumbscrew latches

  • Steel construction withstands 300 °F operating temperatures
  • Thumbscrew latches allow tool-free access for inspection
  • Fits 7–9 in nominal duct diameters
  • Rectangular 8 × 4 in door clears obstructions
  • 22 ga steel thickness resists deformation under pressure

Duct Access Door for Round Ducts

This sandwich-style access door fits nominal duct diameters of 7, 8 and 9 inches. It provides a rectangular opening measuring 4 inches high by 8 inches wide. The unit is built from 22 ga steel and carries a maximum temperature rating of 300 degrees Fahrenheit. It is intended for HVAC technicians who need inspection or cleaning access in high-temperature round ductwork.

Steel Construction with Thumbscrew Latches

The door mounts using two studs that are 2 inches long, securing the frame to the duct wall. Two thumbscrew latches hold the panel closed without requiring tools for routine access. There is no hinge, so the panel removes completely once the latches are released. The 1 1/8 inch door thickness adds rigidity while the steel observation port material matches the frame.

High-Temperature Rating for Demanding Environments

The 300 degree Fahrenheit rating suits systems where exhaust or process heat exceeds standard duct limits. No insulation material is included, so the door relies on the steel body for thermal performance. The fire rating is not rated, meaning the component is not certified as a fire barrier. Buyers needing a listed fire damper or an insulated access panel should look elsewhere.

Highlights

  • Steel construction withstands 300 °F operating temperatures
  • Thumbscrew latches allow tool-free access for inspection
  • Fits 7–9 in nominal duct diameters
  • Rectangular 8 × 4 in door clears obstructions
  • 22 ga steel thickness resists deformation under pressure

Specifications

BrandDUCTMATE

Questions about this item

How hot can the 22-gauge steel door get before it fails?

The access door is rated for a maximum temperature of 300 degrees Fahrenheit, so it will withstand normal HVAC exhaust heat without warping or losing seal integrity.

Will the latch loosen from vibration and thermal cycling during continuous operation?

Two thumbscrew latches and two 2-inch mounting studs clamp the rectangular frame tight, keeping the door secure even when the duct expands and contracts all day.

What duct sizes does the GRDR849F2GA fit without modification?

It mounts directly on nominal 7, 8 or 9 inch round duct, so the existing ductwork must already be one of those three diameters.

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