ASHRAE-90.1-2022- - Page 040

Extracted Content

When (PBP pre - PBP)/BBP > 0.05, new buildings, additions to existing buildings, and/or alterations to existing buildings shall comply with the following:

PCI + [(PBP pre - PBP)/BBP] – 0.05 < PCI t Informative Notes:

1. PBP nre = proposed building performance, no renewable energy .
2. PBP pre = proposed building performance, prescriptive renewable energy .
3. PRE = prescriptive renewable energy .
4. See Informative Appendix I for using other metrics, including site energy, source energy, and carbon emissions, in conjunction with the Normative Appendix G Performance Rating Method when approved by the rating authority .

4.2.1.2 Additions to Existing Buildings. Additions to existing buildings shall comply with the provisions of Section 4.2.2 through 4.2.5 and one of the following:

a. Sections 5, “Building Envelope”; 6, “Heating, Ventilating, and Air Conditioning”; 7, “Service Water

Heating”; 8, “Power”; 9, “Lighting”; 10, “Other Equipment”; and 11, “Additional Efficiency Requirements,” or b. Section 12, “Energy Cost Budget Method,” or c. Normative Appendix G, “Performance Rating Method,” in accordance with Section 4.2.1.1.

4.2.1.2.1 When an addition to an existing building cannot comply by itself, trade-offs will be allowed by modification to one or more of the existing components of the existing building . Modeling of the modified components of the existing building and addition shall employ the procedures of Section 12 or Normative Appendix G; the addition shall not increase the energy consumption of the existing building plus the addition beyond the energy that would be consumed by the existing building plus the addition if the addition alone did comply.

4.2.1.3 Alterations of Existing Building Assemblies, Systems, and Equipment. Alterations of exist- ing building assemblies, systems, and equipment shall comply with the provisions of Section 4.2.2 through 4.2.5 and one of the following:

a. Sections 5, “Building Envelope”; 6, “Heating, Ventilating, and Air Conditioning”; 7, “Service Water

Heating”; 8, “Power”; 9, “Lighting”; 10, “Other Equipment”; and 11, “Additional Efficiency Requirements,” or b. Section 12, “Energy Cost Budget Method,” or c. Normative Appendix G, “Performance Rating Method,” in accordance with Section 4.2.1.1 with the fol lowing modifications:

1. Alterations that meet the criteria in Section G3.1.4(a) shall use the BPF from Table 4.2.1.1 multiplied by 1.05.

2. All other alterations modeled following Section G3.3 shall use BPF = 1.

Exceptions to 4.2.1.3: A building that has been specifically designated as historically significant by the

adopting authority or is listed in The National Register of Historic Places or has been determined to be eligible for listing by the U.S. Secretary of the Interior need not comply with these requirements.

4.2.1.4 New Sites and New Site Systems and Equipment. New sites and new site systems and equip- ment shall comply with either the provisions of

a. Sections 6, “Heating, Ventilating, and Air Conditioning”; 7, “Service Water Heating”; 8, “Power”; 9,

“Lighting”; and 10, “Other Equipment,” or b. Section 12, “Energy Cost Budget Method.”

4.2.1.5 Additions and Alterations to Existing Sites and Site Systems and Equipment. Additions and alterations to existing sites and existing site systems and equipment shall comply with the provisions of Sections 5, 6, 7, 8, 9, and 10, or Section 11. This section shall not apply to buildings on the site where the alterations or additions are to be performed except as required by Sections 4.2.1.2 and 4.2.1.3.

4.2.2.1 Construction Details. Compliance documents shall show all the pertinent data and features of the building, equipment, and systems in sufficient detail to permit a determination of compliance by the building official and to indicate compliance with the requirements of this standard.

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