How can I get the total load capacity for each zone in openstudio ?

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I can not to find the total load information in openstudio or energy plus report. I modeled an office building with hvac system : water cooled chillers and vav with reheat at each thermal zonewith a boiler loop for heating . and i do not know how to find the heating capacity used at the cooling mode for temperature control when the vav close to its minimum.