Pset_CoilPHistory Coil performance history common attributes. Sound attribute deleted in IFC2x2 Pset Addendum: Use IfcSoundProperties instead. IfcCoil IfcCoil AtmosphericPressure Ambient atmospheric pressure. Atmospheric Pressure Pression atmosphérique Pression atmosphérique ambiante. AirPressureDropCurveHistory Air pressure drop curve, pressure drop – flow rate curve, AirPressureDrop = f (AirflowRate). Air Pressure Drop Curve CourbePerteDeChargeAir Courbe de perte de charge aéraulique, courbe perte de charge/débit. SoundCurveHistory Regenerated sound versus air-flow rate. Sound Curve CourbeSon Son généré par rapport au débit aéraulique. FaceVelocity Air velocity through the coil. Face Velocity VitesseFace Vitesse de l'air à travers la batterie.