Duct doors (KCD) are removable and furnished with double cam latches. Frames are easily attached to duct with notched knock-over tabs.
On door sizes of 12x12 inches and smaller, door shall be 24 gauge galvanized steel.
On door sizes of 14x14 inches and larger, door shall be 22 gauge galvanized steel.
Frame is 22 gauge galvanized steel.
Hinge is aluminum, continuous piano. (Or omit hinge and supply with double cam latches)
Door is filled with 2" thick fiberglass insulation compressed into 1". R factor= 7.7
Gasketing between door and frame is 1/2" thick by 1/8" wide, closed cell neoprene gasketing.
Cam latches are zinc plated steel, self tightening and hand operated.
Back of frame has 5/8" notched knock-over edges.