For rectangular or round duct, these doors are provided insulated or uninsulated. For high temperature applications, duct cleaning, or viewing ultraviolet lights in air handling units - these doors are extremely versatile.
These 11 gauge UL 1978 Listed doors are grease and air tight. The sandwich design for rectangular or round grease pipe makes for an easy install. The Weld-On door for rectangular duct has the option of a hinge.
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