Yes, project teams may use the IARW/IACSC Energy Modeling Guideline for Cold Storage and Refrigerated Warehouse Facilities as an exceptional calculation methodology when ASHRAE 90.1-2010 is used for compliance with EA Prerequisite Minimum Energy Performance. This guideline may not be used when an equivalent code is used for compliance unless approved by a project-specific Credit Interpretation Ruling. The following additional requirements apply:
1. Refrigerant type may not be used as an efficiency measure.
2. Table 1.4 must be completed for both the portions of the building complying with the IARW/IACSC Guideline as well as those following the standard ASHRAE 90.1 Appendix G requirements
3. If ASHRAE 62.1-2010 Addendum L is applied using the IARW/IACSC Guideline, it must be applied consistently throughout the project submittal.
4. Projects applying the IARW/IACSC Guideline may apply LEED Interpretation 10237 in order to claim energy savings for refrigeration equipment efficiency as an exceptional calculation methodology.
Internationally applicable as follows: The guidance applies to compliance paths using ASHRAE standards and cannot be applied to projects using an equivalent local code. Project teams wishing to apply this to an equivalent local code must obtain approval through a project-specific credit interpretation ruling.
This ruling supersedes the following LEED Interpretations: LI 5178, LI 2301, and LI 2026.