LEED Interpretation 10416 allows projects to use later versions of ASHRAE 62.1, such as 2019 and 2022. Starting in 2019, there is a Simplified Procedure for calculating System Ventilation Efficiency (Ev). However, the current version of the LEED calculator (v2009v4v4 1_Minimum_IAQ_Performance_Calculator_v05.xlsm) doesn't support this, as it only uses 62.1-2010 for v4 projects or 62.1-2016 for v4.1 projects. Should I provide my own spreadsheet if I want to use a different version of 62.1?
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Gustavo De las Heras Izquierdo
LEED Expert185 thumbs up
November 1, 2023 - 8:48 am
Hi Mark,
There are 3 options to calculate the Ev:
1.Appendix A,
2.Table 6-3
3. Other (specify)
Select "Other" and enter your Ev manually. You may explain that you calculated Ex following ASRHAE 62.1 2019 or 2022 in the Special Cisrcumnstances box.