public bool ConvertValues(bool isIS)
        {
            bool isChanged = false;

            if (IsInternationalSystemOfUnits_IS != isIS)
            {
                IsInternationalSystemOfUnits_IS = isIS;
                WaterFlowRateDataValue.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                HotWaterTemperatureDataValue.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                ColdWaterTemperatureDataValue.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                WetBulbTemperatureDataValue.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                DryBulbTemperatureDataValue.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                FanDriverPowerDataValue.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                BarometricPressureDataValue.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                LiquidToGasRatioDataValue.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                //MechanicalDraftPerformanceCurveDesignInputData.ConvertValue(IsInternationalSystemOfUnits_IS, true);
                isChanged = true;
            }
            return(isChanged);
        }