diff --git a/ThermoPower/Thermal.mo b/ThermoPower/Thermal.mo
index 6a15c39..551168e 100644
--- a/ThermoPower/Thermal.mo
+++ b/ThermoPower/Thermal.mo
@@ -881,7 +881,7 @@ The swapping is performed if the counterCurrent parameter is true (default value
     DHTVolumes side2(final N=Nv) annotation (Placement(transformation(extent={{-40,-42},{40,-20}},
             rotation=0)));
   equation
-    side1.Q = G*(side1.T - side2.T) "Convective heat transfer";
+    side1.Q = G*(side1.T - side2.T)/Nv "Convective heat transfer";
     side1.Q + side2.Q = zeros(Nv) "Static energy balance";
     annotation (Icon(graphics={Text(
             extent={{-100,-44},{100,-68}},