diff --git a/gsy_framework/sim_results/__init__.py b/gsy_framework/sim_results/__init__.py
index 1d488522..1641aad3 100644
--- a/gsy_framework/sim_results/__init__.py
+++ b/gsy_framework/sim_results/__init__.py
@@ -40,6 +40,7 @@ def is_heatpump_node_type(area):
         "VirtualHeatpumpStrategy",
         "MultipleTankHeatPumpStrategy",
         "MultipleTankVirtualHeatpumpStrategy",
+        "HeatPumpStrategyWithoutTanks",
     ]