diff --git a/VECTOAux/VectoAuxiliariesTests/UnitTests/SSMTOOLTests.vb b/VECTOAux/VectoAuxiliariesTests/UnitTests/SSMTOOLTests.vb
index 4709dc41fc1cb94ba608b09b5e1390dc7bddef84..670f09d3139e4636afe6d317a30a2c1478163f01 100644
--- a/VECTOAux/VectoAuxiliariesTests/UnitTests/SSMTOOLTests.vb
+++ b/VECTOAux/VectoAuxiliariesTests/UnitTests/SSMTOOLTests.vb
@@ -115,9 +115,9 @@ Namespace UnitTests
                 Assert.AreEqual(23, target.BoundaryConditions.CoolingBoundaryTemperature.AsDegCelsius)
                 Assert.AreEqual(20, target.BoundaryConditions.VentilationRate.Value()*3600)
                 'Assert.AreEqual(7, target.BoundaryConditions.LowVentilation.Value()*3600)
-                Assert.AreEqual(1236.25, Math.Round(target.BoundaryConditions.VolumeExchange.Value()*3600, 2))
+                'Assert.AreEqual(1236.25, Math.Round(target.BoundaryConditions.VolumeExchange.Value()*3600, 2))
                 'Assert.AreEqual(432.69, Math.Round(target.BoundaryConditions.LowVolumeExchange.Value()*3600, 2))
-                Assert.AreEqual(692.3, Math.Round(target.BoundaryConditions.VentPower.Value(), 2))
+                Assert.AreEqual(692.3, Math.Round(target.BoundaryConditions.VentPower(False).Value(), 2))
                 'Assert.AreEqual(242.3, Math.Round(target.BoundaryConditions.LowVentPower.Value(), 2))
                 Assert.AreEqual(0.56R, target.BoundaryConditions.SpecificVentilationPower.Value()/3600)
                 Assert.AreEqual(0.84, target.BoundaryConditions.AuxHeaterEfficiency)
diff --git a/VECTOAux/VectoAuxiliariesTests/app.config b/VECTOAux/VectoAuxiliariesTests/app.config
new file mode 100644
index 0000000000000000000000000000000000000000..fdc60f6f83437dedadf5df7aad3f232919b15e36
--- /dev/null
+++ b/VECTOAux/VectoAuxiliariesTests/app.config
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="Ninject" publicKeyToken="c7192dc5380945e7" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-3.3.4.0" newVersion="3.3.4.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
\ No newline at end of file
diff --git a/VectoCommon/VectoCommon/BusAuxiliaries/ISSMInputs.cs b/VectoCommon/VectoCommon/BusAuxiliaries/ISSMInputs.cs
index 25ab8d335d72743fbf0d060c0d000b7fc6bde12f..c81d6e24aae0a28c5d7f5b816a84fb19874a724c 100644
--- a/VectoCommon/VectoCommon/BusAuxiliaries/ISSMInputs.cs
+++ b/VectoCommon/VectoCommon/BusAuxiliaries/ISSMInputs.cs
@@ -7,7 +7,6 @@ namespace TUGraz.VectoCommon.BusAuxiliaries
 {
 	public interface ISSMInputs
 	{
-		
 		ISSMBusParameters BusParameters { get; }
 
 		ISSMTechnologyBenefits Technologies { get; }
@@ -40,19 +39,27 @@ namespace TUGraz.VectoCommon.BusAuxiliaries
 		double SolarClouding(Kelvin envTemp);
 
 		Watt HeatPerPassengerIntoCabin(Kelvin envTemp);
+
 		WattPerKelvinSquareMeter UValue { get; }
+
 		Kelvin HeatingBoundaryTemperature { get; }
+
 		Kelvin CoolingBoundaryTemperature { get; }
+
 		Kelvin TemperatureCoolingTurnsOff { get; }
+
 		PerSecond VentilationRate { get; }
-		CubicMeterPerSecond VolumeExchange { get; }
-		Watt VentPower { get; }
+
+		Watt VentPower(bool heating);
+
 		JoulePerCubicMeter SpecificVentilationPower { get; }
+
 		double AuxHeaterEfficiency { get; }
+
 		JoulePerKilogramm GCVDieselOrHeatingOil { get; }
-		//SquareMeterPerMeter WindowAreaPerUnitBusLength { get; }
-		//SquareMeter FrontRearWindowArea { get; }
+
 		Kelvin MaxTemperatureDeltaForLowFloorBusses { get; }
+
 		double MaxPossibleBenefitFromTechnologyList { get; }
 	}
 
@@ -71,7 +78,9 @@ namespace TUGraz.VectoCommon.BusAuxiliaries
 	{
 		// AC-system				            
 		ACCompressorType HVACCompressorType { get; }
+
 		Watt HVACMaxCoolingPower { get; }
+
 		double COP { get; }
 	}
 
@@ -81,14 +90,11 @@ namespace TUGraz.VectoCommon.BusAuxiliaries
 		bool VentilationOnDuringHeating { get; }
 
 		bool VentilationWhenBothHeatingAndACInactive { get; }
-		bool VentilationDuringAC { get;  }
 
-		//VentilationLevel VentilationFlowSettingWhenHeatingAndACInactive { get; }
-		//VentilationLevel VentilationDuringHeating { get; }
-		//VentilationLevel VentilationDuringCooling { get; }
+		bool VentilationDuringAC { get; }
 	}
 
-	
+
 	public enum ACCompressorType
 	{
 		Unknown,
@@ -137,13 +143,10 @@ namespace TUGraz.VectoCommon.BusAuxiliaries
 
 			switch (type) {
 				case ACCompressorType.None:
-				case ACCompressorType.Unknown:
-					return 0;
-				case ACCompressorType.TwoStage:
-					return cop;
+				case ACCompressorType.Unknown: return 0;
+				case ACCompressorType.TwoStage: return cop;
 				case ACCompressorType.ThreeStage:
-				case ACCompressorType.FourStage:
-					return cop * 1.02;
+				case ACCompressorType.FourStage: return cop * 1.02;
 				case ACCompressorType.Continuous:
 					return floortype == FloorType.LowFloor
 						? cop * 1.04
diff --git a/VectoCore/VectoCore/Configuration/Constants.cs b/VectoCore/VectoCore/Configuration/Constants.cs
index 2cccc249901de685b2e12a7d5ee8c8feb0981bec..bbe90aab1c56798a616730e8168d31f54f1e6794 100644
--- a/VectoCore/VectoCore/Configuration/Constants.cs
+++ b/VectoCore/VectoCore/Configuration/Constants.cs
@@ -87,12 +87,11 @@ namespace TUGraz.VectoCore.Configuration
 				public static readonly Kelvin CoolingBoundaryTemperature = 23.0.DegCelsiusToKelvin();
 
 				public static readonly PerSecond HighVentilation = 20.SI(Unit.SI.Per.Hour).Cast<PerSecond>();
+				public static readonly PerSecond HighVentilationHeating = 10.SI(Unit.SI.Per.Hour).Cast<PerSecond>();
 				public static readonly PerSecond LowVentilation = 7.SI(Unit.SI.Per.Hour).Cast<PerSecond>();
 
 				public const double AuxHeaterEfficiency = 0.84;
 
-				public static readonly Watt FuelFiredHeaterPower = 30.SI(Unit.SI.Kilo.Watt).Cast<Watt>();
-
 				public static readonly JoulePerCubicMeter SpecificVentilationPower =
 					0.56.SI(Unit.SI.Watt.Hour.Per.Cubic.Meter).Cast<JoulePerCubicMeter>();
 
diff --git a/VectoCore/VectoCore/InputData/Reader/DataObjectAdapter/DeclarationDataAdapterPrimaryBus.cs b/VectoCore/VectoCore/InputData/Reader/DataObjectAdapter/DeclarationDataAdapterPrimaryBus.cs
index e038ac525c7c68dd62b298bbba544d218872b22b..01777ac29798bbf5b027c12168462fc0505e6035 100644
--- a/VectoCore/VectoCore/InputData/Reader/DataObjectAdapter/DeclarationDataAdapterPrimaryBus.cs
+++ b/VectoCore/VectoCore/InputData/Reader/DataObjectAdapter/DeclarationDataAdapterPrimaryBus.cs
@@ -255,6 +255,7 @@ namespace TUGraz.VectoCore.InputData.Reader.DataObjectAdapter
 			var hvacBusheight = DeclarationData.BusAuxiliaries.CalculateInternalHeight(mission.BusParameter.FloorType, mission.BusParameter.DoubleDecker, busParams.BodyHeight);
 			var coolingPower = CalculateMaxCoolingPower(mission);
 			var retVal = new SSMInputs(null, heatingFuel) {
+				BusFloorType = busParams.FloorType,
 				Technologies = GetSSMTechnologyBenefits(busAuxInputData, mission.BusParameter.FloorType),
 				DefaultConditions = new EnvironmentalConditionMapEntry(
 					Constants.BusAuxiliaries.SteadyStateModel.DefaultTemperature,
@@ -289,7 +290,8 @@ namespace TUGraz.VectoCore.InputData.Reader.DataObjectAdapter
 				NumberOfPassengers =
 					DeclarationData.BusAuxiliaries.CalculateBusFloorSurfaceArea(hvacBusLength, busParams.VehicleWidth) *
 					busParams.PassengerDensity + 1, // add driver for 'heat input'
-				VentilationRate = DeclarationData.BusAuxiliaries.VentilationRate(busParams.HVACConfiguration),
+				VentilationRate = DeclarationData.BusAuxiliaries.VentilationRate(busParams.HVACConfiguration, false),
+				VentilationRateHeating = DeclarationData.BusAuxiliaries.VentilationRate(busParams.HVACConfiguration, true),
 
 				HVACMaxCoolingPower = coolingPower.Item1 + coolingPower.Item2,
 				HVACCompressorType = busParams.HVACCompressorType, // use passenger compartment
diff --git a/VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/HVAC/SSMCalculate.cs b/VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/HVAC/SSMCalculate.cs
index 0886150191f0caa48fd7f316d7a5fbd0855bc8f4..0530682fafa7d21c6cce7f6fdd6683ff489fc174 100644
--- a/VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/HVAC/SSMCalculate.cs
+++ b/VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/HVAC/SSMCalculate.cs
@@ -190,7 +190,7 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 				var run2TotalW = Run2.TotalW(environmentalTemperature, solar);
 
 				var res = run1TotalW < 0 && run2TotalW < 0 && ventilation.VentilationOnDuringHeating
-					? bc.VentPower
+					? bc.VentPower(true)
 					: 0.SI<Watt>();
 
 				return res;
@@ -285,7 +285,7 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 
 			return environmentalTemperature >= gen.BoundaryConditions.TemperatureCoolingTurnsOff && run1TotalW > 0 &&
 					run2TotalW > 0 && gen.Ventilation.VentilationDuringAC
-				?  gen.BoundaryConditions.VentPower
+				?  gen.BoundaryConditions.VentPower(false)
 				: 0.SI<Watt>();
 		}
 
@@ -312,7 +312,7 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 						run1TotalW > 0 && run2TotalW > 0) ||
 						(run1TotalW > 0 && run2TotalW < 0)
 					? gen.Ventilation.VentilationWhenBothHeatingAndACInactive
-						? gen.BoundaryConditions.VentPower
+						? gen.BoundaryConditions.VentPower(false)
 						: 0.SI<Watt>()
 					: 0.SI<Watt>();
 			
@@ -442,69 +442,6 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 			}
 		}
 
-		// Provides Diagnostic Information for the user which can be displayed on the form.
-		// Based on the inputs generated, can be used to cross reference the Excel Model with the
-		// Outputs generated here.
-		public override string ToString()
-		{
-			var sb = new StringBuilder();
-			var vbTab = "\t";
-
-			sb.AppendLine("");
-			sb.AppendLine("TechList Detail");
-			sb.AppendLine("***********************");
-
-			var nameLength = 40;
-			var catLength = 15;
-			var unitLength = 15;
-			var firstValuePos = nameLength + catLength + unitLength + 2;
-			//string cat;
-			//string name;
-
-			sb.AppendLine(string.Format(new string(' ', firstValuePos) + "H{0}VH{0}VV{0}VC{0}C{0}", vbTab));
-
-			//foreach (var line in ssmTOOL.TechList.TechLines) {
-			//	{
-			//		var withBlock = line;
-
-			//		var extraNameSpaces = nameLength - withBlock.BenefitName.Length;
-			//		var extraCatSpaces = catLength - withBlock.Category.Length;
-
-			//		cat = line.Category.Substring(0, Math.Min(line.Category.Length, catLength)) +
-			//			new string(' ', extraCatSpaces < 0 ? 0 : extraCatSpaces).Replace(" ", ".");
-			//		name = line.BenefitName.Substring(0, Math.Min(line.BenefitName.Length, nameLength)) +
-			//				new string(' ', extraNameSpaces < 0 ? 0 : extraNameSpaces).Replace(" ", ".");
-
-			//		sb.AppendLine(
-			//			string.Format(
-			//				cat + name + " {0}{1}{0}{2}{0}{3}{0}{4}{0}{5}", vbTab, withBlock.H.ToString("0.000"),
-			//				withBlock.VH.ToString("0.000"), withBlock.VV.ToString("0.000"), withBlock.VC.ToString("0.000"),
-			//				withBlock.C.ToString("0.000")));
-			//	}
-			//}
-
-			sb.AppendLine("");
-			sb.AppendLine("TechList Totals");
-			sb.AppendLine("***********************");
-
-			{
-				var withBlock = ssmTOOL.TechList;
-				sb.AppendLine(vbTab + vbTab + "H" + vbTab + "VH" + vbTab + "VV" + vbTab + "VC" + vbTab + "C");
-				sb.AppendLine(
-					string.Format(
-						"Base Var %   {0}{1}{0}{2}{0}{3}{0}{4}{0}{5}", vbTab, withBlock.HValueVariation.ToString("0.000"),
-						withBlock.VHValueVariation.ToString("0.000"), withBlock.VVValueVariation.ToString("0.000"),
-						withBlock.VCValueVariation.ToString("0.000"), withBlock.CValueVariation.ToString("0.000")));
-			}
-
-			// Runs
-			sb.AppendLine(Run1.ToString());
-			sb.AppendLine(Run2.ToString());
-
-			
-			return sb.ToString();
-		}
-
 		private Watt CalculateElectricalWBase(ISSMInputs genInputs, IEnvironmentalConditionsMapEntry env)
 		{
 			// MIN(SUM(H94),C54*1000)/C59+SUM(I93:I95)
diff --git a/VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/HVAC/SSMInputs.cs b/VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/HVAC/SSMInputs.cs
index 2a53575a7432a4caaad6abb02f25feff8a7e92b7..fbf2327de6ad0a2ef1df23d0e40b18d5aaba5118 100644
--- a/VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/HVAC/SSMInputs.cs
+++ b/VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/HVAC/SSMInputs.cs
@@ -11,7 +11,7 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 	public class SSMInputs : ISSMInputs, ISSMBoundaryConditions, IEnvironmentalConditions, IACSystem, IVentilation,
 		IAuxHeater, ISSMBusParameters
 	{
-		private IFuelProperties HeatingFuel;
+		private readonly IFuelProperties HeatingFuel;
 
 		public SSMInputs(string source, IFuelProperties heatingFuel = null)
 		{
@@ -21,168 +21,45 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 
 		public string Source { get; }
 
-		//public IVehicleData Vehicle { get; }
-
-
 		// C5/D5
-		public double NumberOfPassengers
-		{
-			get;
-			internal set;
-
-			//get { return Vehicle.PassengerCount; }
-		}
+		public double NumberOfPassengers { get; internal set; }
 
 		// C6/D6
 		public FloorType BusFloorType { get; internal set; }
 
-		// C10/D10
-		//public bool DoubleDecker
-		//{
-		//	get { return Vehicle.DoubleDecker; }
-		//}
-
-		// D12/C12 - ( M )
-		//public Meter BusLength
-		//{
-		//	get { return Vehicle.Length; }
-		//}
-
-		//// D13/C13 - ( M )
-		//public Meter BusWidth
-		//{
-		//	get { return Vehicle.Width; }
-		//}
-
-		//// D14/C14 - ( M )
-		//public Meter BusHeight
-		//{
-		//	get { return Vehicle.Height; }
-		//}
-
-
-		// D7/C7 - ( M/2 )
-		//public SquareMeter BusFloorSurfaceArea
-		//{
-		//	get {
-		//		// =IF(AND(C6="low floor",C13<=2.55,C13>=2.5),(2.55*(C12-1.2)),((C12-1.2)*C13))
-		//		if (BusFloorType == FloorType.LowFloor && BusWidth <= 2.55 && BusWidth >= 2.5) {
-		//			return 2.55.SI<Meter>() * (BusLength - 1.2.SI<Meter>());
-		//		}
-
-		//		return ((BusLength - 1.2.SI<Meter>()) * BusWidth);
-		//	}
-		//}
-
 		// D8/C8 - ( M/2 )
-		public SquareMeter BusSurfaceArea
-		{
-			get;
-			 internal set;
-
-			//get {
-			//	// 2 * (C12*C13 + C12*C14 + C13*C14)
-			//	return 2 * ((BusLength * BusWidth) + (BusLength * BusHeight) + (BusWidth * BusHeight));
-			//}
-		}
+		public SquareMeter BusSurfaceArea { get; internal set; }
 
 		// D9/C9 - ( M/2 )
 		public SquareMeter BusWindowSurface { get; internal set; }
 
-
 		// D11/C11 - ( M/3 )
-		public CubicMeter BusVolume
-		{
-			get; internal set;
-
-			//get {
-			//	// =(C12*C13*C14)
-			//	return BusLength * BusWidth * BusHeight;
-			//}
-		}
-
+		public CubicMeter BusVolume { get; internal set; }
 
 		// C17
 		public double GFactor { get; set; }
 
-		//PassengerBoundaryTemperature = 17
-
 		// C18            
 		public double SolarClouding(Kelvin enviromentalTemperature)
 		{
-			
-				// =IF(C46<17,0.65,0.8)
-				return  enviromentalTemperature < Constants.BusAuxiliaries.SteadyStateModel.PassengerBoundaryTemperature
-					? Constants.BusAuxiliaries.SteadyStateModel.SolarCloudingLow
-					: Constants.BusAuxiliaries.SteadyStateModel.SolarCloudingHigh;
-			
+			// =IF(C46<17,0.65,0.8)
+			return enviromentalTemperature < Constants.BusAuxiliaries.SteadyStateModel.PassengerBoundaryTemperature
+				? Constants.BusAuxiliaries.SteadyStateModel.SolarCloudingLow
+				: Constants.BusAuxiliaries.SteadyStateModel.SolarCloudingHigh;
 		}
 
 		// C19 - ( W )
 		public Watt HeatPerPassengerIntoCabin(Kelvin enviromentalTemperature)
 		{
-				// =IF(C46<17,50,80)
-				return enviromentalTemperature < Constants.BusAuxiliaries.SteadyStateModel.PassengerBoundaryTemperature
-					? Constants.BusAuxiliaries.SteadyStateModel.HeatPerPassengerIntoCabinLow
-					: Constants.BusAuxiliaries.SteadyStateModel.HeatPerPassengerIntoCabinHigh;	
+			// =IF(C46<17,50,80)
+			return enviromentalTemperature < Constants.BusAuxiliaries.SteadyStateModel.PassengerBoundaryTemperature
+				? Constants.BusAuxiliaries.SteadyStateModel.HeatPerPassengerIntoCabinLow
+				: Constants.BusAuxiliaries.SteadyStateModel.HeatPerPassengerIntoCabinHigh;
 		}
 
-		// C20 - ( oC )
-		//public Kelvin PassengerBoundaryTemperature { get; set; }
-
-		// C21 - ( Passenger/Metre Squared )
-		//public PerSquareMeter PassengerDensityLowFloor
-		//{
-		//	get {
-		//		// =IF($C$10="No",3,3.7)
-		//		return (DoubleDecker ? 3.7 : 3).SI<PerSquareMeter>();
-		//	}
-		//}
-
-		//// C22 - ( Passenger/Metre Squared )
-		//public PerSquareMeter PassengerDensitySemiLowFloor
-		//{
-		//	get {
-		//		// =IF($C$10="No",2.2,3)
-		//		return (DoubleDecker ? 3 : 2.2).SI<PerSquareMeter>();
-		//	}
-		//}
-
-		//// C23 - ( Passenger/Metre Squared )
-		//public PerSquareMeter PassengerDensityRaisedFloor
-		//{
-		//	get {
-		//		// =IF($C$10="No",1.4,2)
-		//		return (DoubleDecker ? 2 : 1.4).SI<PerSquareMeter>();
-		//	}
-		//}
-
-		//// C24               
-		//public double CalculatedPassengerNumber
-		//{
-		//	get {
-		//		// =ROUND(IF($D$5<IF(D6="low floor",C21,IF(D6="semi low floor",C22,C23))*D7,$D$5,IF(D6="low floor",C21,IF(D6="semi low floor",C22,C23))*D7),0)
-		//		var tmp = (BusFloorType == FloorType.LowFloor
-		//					? PassengerDensityLowFloor
-		//					: BusFloorType == FloorType.SemiLowFloor
-		//						? PassengerDensitySemiLowFloor
-		//						: PassengerDensityRaisedFloor) * BusFloorSurfaceArea;
-		//		return Math.Round(NumberOfPassengers < tmp ? NumberOfPassengers : tmp.Value(), 0);
-		//	}
-		//}
 
 		// C25 - ( W/K/M3 )
-		public WattPerKelvinSquareMeter UValue
-		{
-			get;
-			internal set;
-
-			//get {
-			//	// =IF(D6="low floor",4,IF(D6="semi low floor",3.5,3))
-			//	return (BusFloorType == FloorType.LowFloor ? 4 : BusFloorType == FloorType.SemiLowFloor ? 3.5 : 3)
-			//		.SI<WattPerKelvinSquareMeter>();
-			//}
-		}
+		public WattPerKelvinSquareMeter UValue { get; internal set; }
 
 		// C26 - ( oC )
 		public Kelvin HeatingBoundaryTemperature { get; set; }
@@ -199,45 +76,15 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 		// C29 - ( L/H )  --- !! 1/h
 		public PerSecond VentilationRate { get; set; }
 
-		// C30 - ( L/H )   --- !! 1/h
-		//public PerSecond LowVentilation { get; set; }
-
-		// C31 - ( M3/H )
-		public CubicMeterPerSecond VolumeExchange
-		{
-			get {
-				// =D11*C29
-				return BusVolume * VentilationRate;
-			}
-		}
-
-		// C32 - ( M3/H )
-		//public CubicMeterPerSecond LowVolumeExchange
-		//{
-		//	get {
-		//		// =C30*D11
-		//		return BusVolume * LowVentilation;
-		//	}
-		//}
+		public PerSecond VentilationRateHeating { get; internal set; }
 
 		// C33 - ( W )
-		public Watt VentPower
+		public Watt VentPower(bool heating)
 		{
-			get {
-				// =C31*C35
-				return VolumeExchange * SpecificVentilationPower;
-			}
+			// =C31*C35
+			return BusVolume * (heating ? VentilationRateHeating : VentilationRate) * SpecificVentilationPower;
 		}
 
-		// C34 - ( W )
-		//public Watt LowVentPower
-		//{
-		//	get {
-		//		// =C32*C35
-		//		return LowVolumeExchange * SpecificVentilationPower;
-		//	}
-		//}
-
 		// C35 - ( Wh/M3 )
 		public JoulePerCubicMeter SpecificVentilationPower { get; set; }
 
@@ -245,25 +92,10 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 		public double AuxHeaterEfficiency { get; set; }
 
 		// C38 - ( KW/HKG )
-		public JoulePerKilogramm GCVDieselOrHeatingOil { get { return HeatingFuel.LowerHeatingValueVecto; } }
-
-		// C40 - ( M2/M )
-		//public SquareMeterPerMeter WindowAreaPerUnitBusLength
-		//{
-		//	get {
-		//		// =IF($C$10="No",1.5,2.5)
-		//		return (DoubleDecker ? 2.5 : 1.5).SI<SquareMeterPerMeter>();
-		//	}
-		//}
-
-		//// C41 - ( M/2 )
-		//public SquareMeter FrontRearWindowArea
-		//{
-		//	get {
-		//		// =IF($C$10="No",5,8)
-		//		return (DoubleDecker ? 8 : 5).SI<SquareMeter>();
-		//	}
-		//}
+		public JoulePerKilogramm GCVDieselOrHeatingOil
+		{
+			get { return HeatingFuel.LowerHeatingValueVecto; }
+		}
 
 		// C42 - ( K )
 		public Kelvin MaxTemperatureDeltaForLowFloorBusses
@@ -275,12 +107,6 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 		public double MaxPossibleBenefitFromTechnologyList { get; set; }
 
 
-		// C46 - ( oC )
-		//public Kelvin EnviromentalTemperature { get; set; }
-
-		// C47 - ( W/M3 )
-		//public WattPerSquareMeter Solar { get; set; }
-
 		public IEnvironmentalConditionsMapEntry DefaultConditions { get; set; }
 
 		// ( EC_EnviromentalTemperature and  EC_Solar) (Batch Mode)
@@ -317,19 +143,6 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 		// C64 - Boolean Yes/No
 		public bool VentilationDuringAC { get; set; }
 
-		// C65 - String high/low
-		//public VentilationLevel VentilationFlowSettingWhenHeatingAndACInactive { get; set; }
-
-		//// C66 - String high/low
-		//public VentilationLevel VentilationDuringHeating { get; set; }
-
-		//// C67 - String high/low                                               
-		//public VentilationLevel VentilationDuringCooling { get; set; }
-
-
-		// C70 - ( KW )
-		//public Watt EngineWasteHeatkW { get; set; }
-
 		// C71 - ( KW )
 		public Watt FuelFiredHeaterPower { get; set; }
 
@@ -372,7 +185,6 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.DownstreamModules.Impl.HVAC
 
 		public ISSMTechnologyBenefits Technologies { get; set; }
 
-
 		#endregion
 	}
 }
diff --git a/VectoCore/VectoCore/Models/Declaration/DeclarationData.cs b/VectoCore/VectoCore/Models/Declaration/DeclarationData.cs
index a8a39a1cfba8914c9cc5145e1fdee4c9b4d007ee..c05f03cca2764aa83b57ddf0b38d4b8ac6a8713f 100644
--- a/VectoCore/VectoCore/Models/Declaration/DeclarationData.cs
+++ b/VectoCore/VectoCore/Models/Declaration/DeclarationData.cs
@@ -197,7 +197,7 @@ namespace TUGraz.VectoCore.Models.Declaration
 				get { return hvacMaxCoolingPower ?? (hvacMaxCoolingPower = new HVACCoolingPower()); }
 			}
 
-			public static PerSecond VentilationRate(BusHVACSystemConfiguration hvacSystemConfig)
+			public static PerSecond VentilationRate(BusHVACSystemConfiguration hvacSystemConfig, bool heating)
 			{
 
 				switch (hvacSystemConfig) {
@@ -213,7 +213,9 @@ namespace TUGraz.VectoCore.Models.Declaration
 					case BusHVACSystemConfiguration.Configuration7: 
 					case BusHVACSystemConfiguration.Configuration8: 
 					case BusHVACSystemConfiguration.Configuration9:
-						return Constants.BusAuxiliaries.SteadyStateModel.HighVentilation;
+						return heating
+							? Constants.BusAuxiliaries.SteadyStateModel.HighVentilationHeating
+							: Constants.BusAuxiliaries.SteadyStateModel.HighVentilation;
 						
 					default: throw new ArgumentOutOfRangeException(nameof(hvacSystemConfig), hvacSystemConfig, null);
 				}