Hisham,
The value is a judgment on the part of the energy modeler and should reflect realistic expectations for the HVAC system control. I like to use 0.5C, although I think you can justify up to 1C, depending on the system. The E+ default value is too small, in my opinion, for almost every system and can produce large numbers of unmet heating / cooling load hours.
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Monday, August 18, 2014 2:51 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] OutputControl:ReportingTolerances for Reporting Unmet Hours
Dear group,
Please, can anyone define exactly where to get this value? Default OutputControl:ReportingTolerances is 0.2C in e+ and 0.5C in DB, I searched the group but no posts defined this clearly.
If there is some procedure to determine this tolerance for each certain project, then please describe it.
Hisham
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Posted by: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
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