ASHRAE-90.1-2022- - Page 261

Extracted Content

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 .

A7.1 Unlabeled Opaque Doors. Unlabeled opaque doors shall be assigned the following U-factors :

a. Uninsulated single-layer metal swinging doors or nonswinging doors, including single-layer uninsulated

access hatches and uninsulated smoke vents: U-1.45. b. Insulated double-layer metal coiling doors : U-1.00. c. Uninsulated double-layer metal swinging doors or nonswinging doors, including double-layer uninsu lated access hatches and uninsulated smoke vents: U-0.70. d. Insulated metal swinging doors, including fire-rated doors, insulated access hatches, insulated smoke

vents, and other insulated metal nonswinging doors : U-0.50. e. Wood doors, minimum nominal thickness of 1.75 in., including panel doors with minimum panel thick ness of 1.125 in., solid core flush doors, and hollow core flush doors : U-0.50. f. Any other wood door : U-0.60.

A8. FENESTRATION

All fenestration with U-factors, SHGC, or visible transmittance determined, certified, and labeled in accordance with NFRC 100, 200, and 300, respectively, shall be assigned those values.

A8.1 Unlabeled Skylights. Unlabeled skylights shall be assigned the U-factors in Table A8.1-1 and are allowed to use the SHGCs and VTs in Table A8.1-2. The metal with thermal break frame category shall not be used unless all frame members have a thermal break equal to or greater than 0.25 in.

A8.2 Unlabeled Vertical Fenestration. Unlabeled vertical fenestration, both operable and fixed, shall be assigned the U-factors, SHGCs, and VTs in Table A8.2.

ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 259