diff --git a/domain/epc/property_overrides/main_heating_system_type.py b/domain/epc/property_overrides/main_heating_system_type.py
index bea14e6a..3bfff01e 100644
--- a/domain/epc/property_overrides/main_heating_system_type.py
+++ b/domain/epc/property_overrides/main_heating_system_type.py
@@ -24,4 +24,5 @@ class MainHeatingSystemType(Enum):
     ELECTRIC_STORAGE_CONVECTOR = "Electric storage heaters, convector"
     ELECTRIC_STORAGE_FAN = "Electric storage heaters, fan"
     DIRECT_ELECTRIC = "Direct-acting electric"
+    ELECTRIC_ROOM_HEATERS = "Electric room heaters"
     UNKNOWN = "Unknown"