diff --git a/IDEAS/Buildings/Components/Shading/Screen.mo b/IDEAS/Buildings/Components/Shading/Screen.mo
index 358e854c3..cf4a0b796 100644
--- a/IDEAS/Buildings/Components/Shading/Screen.mo
+++ b/IDEAS/Buildings/Components/Shading/Screen.mo
@@ -22,7 +22,7 @@ protected
   Modelica.Units.SI.Temperature TShaScreen = Te_internal + (HSha*(1-g_glazing) + (H - HSha) * epsSw_shading) /hSha
     "Modified shading device heat balance";
 initial equation
-  assert( abs(shaCorr + refSw_shading + epsSw_shading - 1) > 1e-3, "In " + getInstanceName() +
+  assert( abs(shaCorr + refSw_shading + epsSw_shading - 1) < 1e-3, "In " + getInstanceName() +
     ": The sum of the screen transmittance 'shaCorr', reflectance 'refSw_shading' and absorptance 'epsSw_shading' does not equal one. This is non-physical.");
 equation
   HShaDirTil = HDirTil*((1 - limiter.y) + limiter.y*shaCorr);
diff --git a/IDEAS/Buildings/Components/Window.mo b/IDEAS/Buildings/Components/Window.mo
index 447aa9568..49a9087ef 100644
--- a/IDEAS/Buildings/Components/Window.mo
+++ b/IDEAS/Buildings/Components/Window.mo
@@ -142,6 +142,8 @@ model Window "Multipane window"
   IDEAS.Airflow.Multizone.TrickleVent trickleVent(
     redeclare package Medium = Medium,
     allowFlowReversal = true,
+    dp_nominal=dp_nominal,
+    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"