diff --git a/domain/sap10_calculator/rdsap/cert_to_inputs.py b/domain/sap10_calculator/rdsap/cert_to_inputs.py
index 469223ab..0ea700e8 100644
--- a/domain/sap10_calculator/rdsap/cert_to_inputs.py
+++ b/domain/sap10_calculator/rdsap/cert_to_inputs.py
@@ -995,6 +995,8 @@ _SECONDARY_HEATING_FRACTION_BY_CATEGORY: Final[dict[int, float]] = {
                # p.188). Cert 0380 (warm air mains gas, code 506, +
                # electric room-heater secondary) raised here before.
     10: 0.20,
+    11: 0.10,   # Electric ceiling heating (SAP code 701): direct-acting
+                # electric, SAP 10.2 Table 11 "Other electric systems" row.
 }
 _SECONDARY_HEATING_FRACTION_DEFAULT: Final[float] = 0.10
 
diff --git a/tests/domain/sap10_calculator/rdsap/test_cert_to_inputs.py b/tests/domain/sap10_calculator/rdsap/test_cert_to_inputs.py
index c6e53595..17edfabd 100644
--- a/tests/domain/sap10_calculator/rdsap/test_cert_to_inputs.py
+++ b/tests/domain/sap10_calculator/rdsap/test_cert_to_inputs.py
@@ -4958,6 +4958,7 @@ def test_secondary_heating_fraction_for_category_full_table_11_coverage() -> Non
     assert _secondary_heating_fraction_for_category(5) == 0.10
     assert _secondary_heating_fraction_for_category(6) == 0.10
     assert _secondary_heating_fraction_for_category(7) == 0.15
+    assert _secondary_heating_fraction_for_category(8) == 0.10   # was untested
     # Category 9 = warm-air systems (NOT heat pump). A gas/oil warm-air
     # unit is an "All gas, liquid and solid fuel systems" row (0.10);
     # electric warm air is "Other electric systems" (also 0.10) — so 0.10
@@ -4966,6 +4967,7 @@ def test_secondary_heating_fraction_for_category_full_table_11_coverage() -> Non
     # secondary) previously raised UnmappedSapCode here, blocking it.
     assert _secondary_heating_fraction_for_category(9) == 0.10
     assert _secondary_heating_fraction_for_category(10) == 0.20
+    assert _secondary_heating_fraction_for_category(11) == 0.10  # electric ceiling heating (SAP code 701)
     # Absent
     assert _secondary_heating_fraction_for_category(None) == 0.10
     # Lodging present but unmapped → raise