diff --git a/domain/epc/property_overlays/water_heating_overlay.py b/domain/epc/property_overlays/water_heating_overlay.py
index d75ea81c0..e55a578ed 100644
--- a/domain/epc/property_overlays/water_heating_overlay.py
+++ b/domain/epc/property_overlays/water_heating_overlay.py
@@ -21,6 +21,8 @@ from domain.modelling.simulation import EpcSimulation, HeatingOverlay
 # family (26 mains gas, 29 electricity), matching the main_fuel overlay.
 _WATER_HEATING_CODES: dict[str, tuple[int, int]] = {
     "From main system, mains gas": (901, 26),
+    "From main system, electricity": (901, 29),
+    "Electric immersion, electricity": (903, 29),
 }