LEED - Outdoor air flow cycled

asked 2022-11-14 15:59:40 -0600

lrebello's avatar

updated 2022-11-14 16:26:20 -0600

Hello all,

I have a proposed model with a VRF HVAC system and I have received this question/comment from LEED:

"In addition, verify that all HVAC systems in both the Proposed and Baseline cases are modeled with zero outdoor air flow when the HVAC fans are cycled on to meet unoccupied setback temperatures, unless health or safety regulations mandate in alternate minimum flow during unoccupied periods (in which case, the unoccupied minimum outdoor air ventilation rates must be modeled identically in each model)."

Does anyone know what should I do to reflect this in my proposed model?

Also, what does it mean to "HVAC fans are cycled"?

Thanks a lot

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