A7 Opaque Doors

All opaque doors with U-factors determined, certified, and labeled in accordance with NFRC 100 or ANSI/DASMA 105 shall be assigned those U-factors.

Unlabeled opaque doors shall be assigned the following U-factors:

1. Uninsulated single-layer metal swinging doors or nonswinging doors, including single-layer uninsulated access hatches and uninsulated smoke vents: 1.45.
2. Insulated double-layer metal coiling doors: U-l.00.
3. Uninsulated double-layer metal swinging doors or nonswinging doors, including double-layer uninsulated access hatches and uninsulated smoke vents: 0.70.
4. Insulated metal swinging doors, including fire-rated doors, insulated access hatches, insulated smoke vents, and other insulated metal nonswinging doors: 0.50.
5. Wood doors, minimum nominal thickness of 1.75 in., including panel doors with minimum panel thickness of 1.125 in., solid core flush doors, and hollow core flush doors: 0.50.
6. Any other wood door: 0.60.