diff --git a/IDEAS/Buildings/Components/Interfaces/SolBus.mo b/IDEAS/Buildings/Components/Interfaces/SolBus.mo
index 2acbb3cbd..cee72846e 100644
--- a/IDEAS/Buildings/Components/Interfaces/SolBus.mo
+++ b/IDEAS/Buildings/Components/Interfaces/SolBus.mo
@@ -1,5 +1,5 @@
 within IDEAS.Buildings.Components.Interfaces;
-expandable connector SolBus
+connector SolBus
   "Bus containing solar radiation for various incidence angles as well as external convection coefficients"
   parameter Boolean outputAngles = true "Set to false when linearising in Dymola only";
   IDEAS.Buildings.Components.Interfaces.RealConnector HDirTil(unit="W/(m2)",start=100) annotation ();
diff --git a/IDEAS/Buildings/Components/Interfaces/WeaBus.mo b/IDEAS/Buildings/Components/Interfaces/WeaBus.mo
index 3358796b2..da748a2de 100644
--- a/IDEAS/Buildings/Components/Interfaces/WeaBus.mo
+++ b/IDEAS/Buildings/Components/Interfaces/WeaBus.mo
@@ -1,5 +1,5 @@
 within IDEAS.Buildings.Components.Interfaces;
-expandable connector WeaBus "Data bus that stores weather data"
+connector WeaBus "Data bus that stores weather data"
   parameter Integer numSolBus;
   parameter Boolean outputAngles = true "Set to false when linearising in Dymola only";
 
diff --git a/IDEAS/Buildings/Components/Interfaces/ZoneBus.mo b/IDEAS/Buildings/Components/Interfaces/ZoneBus.mo
index acb124384..a546e8ddc 100644
--- a/IDEAS/Buildings/Components/Interfaces/ZoneBus.mo
+++ b/IDEAS/Buildings/Components/Interfaces/ZoneBus.mo
@@ -1,5 +1,5 @@
 within IDEAS.Buildings.Components.Interfaces;
-connector ZoneBus
+expandable connector ZoneBus
   replaceable package Medium =
     Modelica.Media.Interfaces.PartialMedium "Medium in the component";
   parameter Integer numIncAndAziInBus
diff --git a/IDEAS/Buildings/Components/Window.mo b/IDEAS/Buildings/Components/Window.mo
index 3193ebac9..55818dade 100644
--- a/IDEAS/Buildings/Components/Window.mo
+++ b/IDEAS/Buildings/Components/Window.mo
@@ -145,7 +145,7 @@ model Window "Multipane window"
     m_flow_nominal=m_flow_nominal,
     use_y = use_trickle_vent_control)
     if use_trickle_vent and sim.interZonalAirFlowType <> IDEAS.BoundaryConditions.Types.InterZonalAirFlow.None
-    "Trickle vent"
+"Trickle vent. Height assumed at the middle of the surface, i.e. at the reference pressure."
     annotation (Placement(visible = true, transformation(origin = {0, -158}, extent = {{20, 88}, {40, 68}}, rotation = 0)));
   replaceable
   IDEAS.Buildings.Components.BaseClasses.RadiativeHeatTransfer.SwWindowResponse
@@ -183,7 +183,7 @@ model Window "Multipane window"
   Modelica.Blocks.Sources.RealExpression y_window_trunc(y = max(0, min(1, y_window_internal)))
     "Truncated control signal" annotation (
     Placement(visible = true, transformation(origin = {-10, -90}, extent = {{-10, 10}, {10, -10}}, rotation = 90)));
-  Airflow.Multizone.ReversibleDensityColumn col_trickle(redeclare package Medium = Medium) if sim.interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts "Column for port trickle vent" annotation(
+  Airflow.Multizone.ReversibleDensityColumn col_trickle(redeclare package Medium = Medium, h=hVertical/2) if sim.interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts "Column for port trickle vent" annotation(
     Placement(transformation(origin = {112, -40}, extent = {{50, -10}, {70, 10}}, rotation = 180)));
 protected
   Modelica.Blocks.Interfaces.RealInput y_window_internal;
diff --git a/IDEAS/Buildings/Examples/ZoneExample.mo b/IDEAS/Buildings/Examples/ZoneExample.mo
index 5e54206c1..c5a996bc1 100644
--- a/IDEAS/Buildings/Examples/ZoneExample.mo
+++ b/IDEAS/Buildings/Examples/ZoneExample.mo
@@ -6,7 +6,7 @@ model ZoneExample
   parameter Modelica.Units.SI.Length l=4 "Room length";
   parameter Modelica.Units.SI.Length w=4 "Room width";
   parameter Modelica.Units.SI.Length h=2.7 "Room height";
-  inner BoundaryConditions.SimInfoManager sim(interZonalAirFlowType=IDEAS.BoundaryConditions.Types.InterZonalAirFlow.OnePort)
+  inner BoundaryConditions.SimInfoManager sim(interZonalAirFlowType=IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts)
                                               "Data reader"
     annotation (Placement(transformation(extent={{-96,76},{-76,96}})));
   IDEAS.Buildings.Components.Zone zone(
@@ -122,4 +122,4 @@ First implementation.
       StopTime=1000000,
       Tolerance=1e-06,
       __Dymola_Algorithm="Lsodar"));
-end ZoneExample;
+end ZoneExample;
\ No newline at end of file