Hello folks,

Hopefully someone knows how to deal with outside air. I can't seem to figure out how to set my minimum outside air on my HVAC systems. When I set my OA minimum on my Air system , and adjust the minimum OA fraction in my schedule I still get ventilation results below my set minimum. It seems, no matter what I do to the outside air setting on the system side the program sizes the OA ventilation based solely on what my outside air ventilation rates of the individual spaces and ignores any setting I put in my system. Does anyone have experience on how to remedy this?

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- Thank you,

Scott Tomlinson, PE, LEED-AP