Pset_SpaceThermalDesignDefinition from IAI: Space or zone HVAC design requirements. HISTORY: New property set in IFC Release 1.0 (Pset_SpaceHvacInformation); renamed to Pset_SpaceThermalDesign and revised in IFC2x2.Entity common property setIfcSpaceCoolingDesignAirflowThe air flowrate required during the peak cooling conditions. HeatingDesignAirflowThe air flowrate required during the peak heating conditions, but could also be determined by minimum ventilation requirement or minimum air change requirements. TotalSensibleHeatGainThe total sensible heat or energy gained by the space during the peak cooling conditions. TotalHeatGainThe total amount of heat or energy gained by the space at the time of the space's peak cooling conditions. TotalHeatLossThe total amount of heat or energy lost by the space at the time of the space's peak heating conditions. CoolingDryBulbInside dry bulb temperature for cooling design CoolingRelativeHumidityInside relative humidity for cooling design. HeatingDryBulbInside dry bulb temperature for heating design HeatingRelativeHumidityInside relative humidity for heating design. VentilationAirFlowrateVentilation outside air requirement for the space. ExhaustAirFlowrateDesign exhaust air flow rate for the space. CeilingRAPlenumCeiling plenum used for return air or not. TRUE = Yes, FALSE = No. BoundaryAreaHeatLossHeat loss per unit area for the boundary object. This is a design input value for use in the absence of calculated load data.