HVAC unmet hours - high cfm/ton cooling

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Hello, I am having some issues on a EPAct project with HVAC Equipment. The Quality Check Details states that My CFM/ton of Cooling is high at around 750cfm/ton. I have entered the exact design flows/ sizes of the heat pumps as indicated in the mechanical schedules, but something seems to be short circuiting the heating/ cooling relationship. Should I discard the actual supply flow rate? I guess the real question stems from the fact that when I increase the sizing of the system above 1.0 to ~1.25, the heating actually gets worse. Same thing with specifying airflow zone by zone. At this point, it seems that there is something obvious I am overlooking. thanks, nic

Nicholas Fonner
Energy Modeling Group
Henneman Engineering, Inc. | energy. focused.
1605 South State Street, Champaign, IL 61820
V 217.359.1514 | F 217.359.9354 | C
www.henneman.com | nfonner@henneman.com

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For reducing heating unmet hours I have found that reducing the min flow helps, or sometimes increasing the reheat supply temp if that is an option. -Rohini
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