diff --git a/etl/epc_clean/epc_attributes/MainheatAttributes.py b/etl/epc_clean/epc_attributes/MainheatAttributes.py
index c9f9fbe3..6382238f 100644
--- a/etl/epc_clean/epc_attributes/MainheatAttributes.py
+++ b/etl/epc_clean/epc_attributes/MainheatAttributes.py
@@ -34,6 +34,8 @@ class MainHeatAttributes(Definitions):
         "gwresogyddion ystafell, trydan": "room heaters, electric",
         "pwmp gwres sygçön tarddu yn yr awyr, dan y llawr, trydan": "air source heat pump, underfloor heating, "
                                                                     "electric",
+        "pwmp gwres sygçön tarddu yn yr awyr, dan y llawr, trydan, pwmp gwres sygçön tarddu yn yr awyr, dan y llawr, "
+        "trydan": "air source heat pump, underfloor heating, electric",
         "cynllun cymunedol": "community scheme",
         "bwyler a gwres dan y llawr, nwy prif gyflenwad": "boiler and underfloor heating, mains gas",
         "bwyler a rheiddiaduron, logiau coed": 'boiler and radiators, wood logs',