ASHRAE-90.1-2022- - Page 045
Extracted Content
- Replacement of existing fenestration, provided that the area of the replacement fenestration does not exceed 25% of the total fenestration area of an existing building and that the U-factor and
lation requirements in Section 5.5.3.1.1 cannot be met due to existing roof conditions, the roof replacement shall be constructed in accordance with approved construction documents, which shall include
a. a roof inspection report documenting existing roof conditions and b. a roof design minimizing deviation from the requirements of Section 5.5.3.1.1.
Informative Note: The proposed roof design should be prepared by an approved entity capable of determining whether the design complies with the requirements of Section 5.1.4.1 to the extent practical.
5.1.5 Climate. Determine the climate zone for the location. For U.S. locations, follow the procedure in Section 5.1.5.1. For international locations, follow the procedure in Section 5.1.5.2.
Exception to 5.1.5.1: If there are recorded historical climatic data available for a construction site, they
may be used to determine compliance if approved by the building official .
Informative Note: Annex 1 (included at the end of this document) contains an extraction from ASHRAE Standard 169, Table B-1, “U.S. Climate Zones by State and County.”
5.1.5.2 International Locations. For locations in Canada that are listed in ASHRAE Standard 169, Table A-5, “Canada Stations and Climate Zones,” use this table to determine the required assigned climate zone number and, where required, the assigned climate zone letter. For locations in other international countries that are listed in ASHRAE Standard 169, Table A-6, “International Stations and Climate Zones,” use this table to determine the required climate zone number and, where required, the assigned climate zone letter. For all international locations that are not listed either in ASHRAE Standard 169, Table A-5, “Canada Stations and Climate Zones,” or ASHRAE Standard 169, Table A-6, “International Stations and Climate Zones,” use ASHRAE Standard 169, Section A3, “Climate Zone Definitions,” and Table A-3, “Thermal Climate Zone Definitions,” to determine both the climate zone number and letter.
Informative Note: Annex 1 (included at the end of this document) contains extractions from ASHRAE Standard 169, Table A-5, “Canada Stations and Climate Zones”; ASHRAE Standard 169, Table A-6, “International Stations and Climate Zones”; ASHRAE Standard 169, Section A3, “Climate Zone Definitions”; and Table A-3, “Thermal Climate Zone Definitions.”
5.1.6 Space Conditioning Categories 5.1.6.1 Separate building envelope requirements are specified for (a) nonresidential conditioned space, (b) residential conditioned space, and (c) semiheated space .
5.1.6.2 The minimum skylight area requirements in Section 5.5.4.2.3 are also specified for uncondi- tioned spaces .
5.1.6.3 Spaces shall be assumed to be conditioned spaces and shall comply with the requirements for conditioned spaces at the time of construction, regardless of whether mechanical or electrical equipment is included in the building permit application or installed at that time.
ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 43