Ductmate
Ductmate 12818 12 x 8 in HVAC Control 300°F 22 ga Steel
Rectangular steel access door measuring 12 by 8 inches with thumbscrew latches for 17 or 18 inch duct rated to 300 degrees Fahrenheit
- Rectangular 12 x 8 in access door fits 17 and 18 in ducts
- 22 ga steel construction withstands 300 °F operating temperatures
- Thumbscrew latches allow quick tool-free opening for inspection
- Two 2 in mounting studs provide secure attachment to ductwork
- Steel observation port material resists high heat without deformation
Duct Access Door 12 x 8 in
The Ductmate 12818 is a rectangular steel access door sized 12 inches wide by 8 inches high. It is designed for service entry on nominal 17 and 18 inch round ducts in commercial HVAC systems. The door panel is 22 gauge steel with a 1 1/8 inch thickness and carries a maximum temperature rating of 300 degrees Fahrenheit.
Upgrade from basic cut-outs
This door replaces simple cut-and-cover openings that lack insulation or a secure seal. The jump is worth it when maintenance crews need repeated, tool-free entry without compromising duct integrity or fire safety. Two thumbscrew latches and two 2 inch mounting studs provide a tight closure that resists vibration and air leakage.
Limits of the sandwich-style interface
The sandwich-style frame requires adequate duct wall clearance for the 2 inch mounting studs and the 1 1/8 inch door thickness. No observation port is included, so visual inspection requires opening the door. The assembly is not fire rated and the insulation material is not applicable, limiting use to non-rated ductwork sections.
Highlights
- Rectangular 12 x 8 in access door fits 17 and 18 in ducts
- 22 ga steel construction withstands 300 °F operating temperatures
- Thumbscrew latches allow quick tool-free opening for inspection
- Two 2 in mounting studs provide secure attachment to ductwork
- Steel observation port material resists high heat without deformation
Specifications
| Brand | DUCTMATE |
|---|
Questions about this item
Will the 12 x 8 in door fit a 17 in or 18 in nominal duct?
Yes, the access door is designed for nominal duct diameters of 17 in and 18 in. The rectangular opening measures 12 in wide by 8 in high.
How are the two 2 in mounting studs secured, and what step is often missed?
The studs are inserted through the duct wall and fastened with the thumbscrew latches; the step often missed is tightening both thumbscrews evenly to compress the gasket fully.
Does the 22 ga steel door need any periodic maintenance at 300 °F?
No scheduled maintenance is required; the steel construction and thumbscrew latches are rated for continuous exposure up to 300 °F without degradation.
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