diff --git a/IDEAS/Templates/Examples/ConstantAirFlowRecup.mo b/IDEAS/Templates/Examples/ConstantAirFlowRecup.mo
index 154fdd6ad..4cc6561a9 100644
--- a/IDEAS/Templates/Examples/ConstantAirFlowRecup.mo
+++ b/IDEAS/Templates/Examples/ConstantAirFlowRecup.mo
@@ -11,8 +11,8 @@ model ConstantAirFlowRecup
   IDEAS.Templates.Structure.ThreeZone structure(
     redeclare package Medium = Medium)
     annotation (Placement(transformation(extent={{-80,-40},{-50,-20}})));
-  replaceable IDEAS.Templates.Ventilation.ConstantAirFlowRecup constantAirFlowRecup(
-    n=2.*structure.VZones)
+  replaceable IDEAS.Templates.Ventilation.ConstantAirFlowRecup constantAirFlowRecup(n=2*ones(
+        nZones))
   constrainedby IDEAS.Templates.Interfaces.BaseClasses.VentilationSystem(
     nZones=3,
     VZones=structure.VZones,