diff --git a/src/HPWHpresets.cc b/src/HPWHpresets.cc
index 81b2ada4..a7b6bf81 100644
--- a/src/HPWHpresets.cc
+++ b/src/HPWHpresets.cc
@@ -3827,7 +3827,7 @@ int HPWH::HPWHinit_presets(MODELS presetNum) {
 		heatSources[0].companionHeatSource = &heatSources[2];
 	}	
 	else if (presetNum == MODELS_AQUATHERMAIRE) { // AquaThermAire
-		setNumNodes(1);
+		setNumNodes(12);
 		setpoint_C = 50.;
 
 		initialTankT_C = 49.32;
diff --git a/test/AquaThermAire.txt b/test/AquaThermAire.txt
index 4886aa79..7b2e093b 100644
--- a/test/AquaThermAire.txt
+++ b/test/AquaThermAire.txt
@@ -1,5 +1,5 @@
 verbosity silent
-numNodes 1 #number of nodes
+numNodes 12 #number of nodes
 setpoint 50 C
 volume 54.4 gal
 UA 10.35 kJperHrC