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Default a solid-fuel room heater's natural fuel to house coal 🟥

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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Khalim Conn-Kowlessar 2026-06-30 16:54:07 +00:00
parent d5927c68a9
commit 390df5a6bd
1 changed files with 16 additions and 0 deletions
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16
tests/domain/epc/test_main_heating_system_overlay.py
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@ -436,3 +436,19 @@ def test_electric_room_heaters_drag_their_natural_electricity_fuel() -> None:
assert simulation is not None
assert simulation.heating is not None
assert simulation.heating.main_fuel_type == 29
def test_solid_fuel_room_heater_defaults_to_house_coal_as_its_natural_fuel() -> None:
# Solid fuel is fuel-ambiguous (coal / anthracite / smokeless / dual fuel /
# wood logs / pellets), but the system must still self-cohere when no
# main_fuel override is given. Default to house coal (RdSAP main_fuel code
# 33), the most common solid fuel; a main_fuel override naming a specific
# solid fuel still wins by last-wins composition (ADR-0041).
# Act
simulation = main_heating_overlay_for("Solid fuel room heater, closed", 0)
# Assert
assert simulation is not None
assert simulation.heating is not None
assert simulation.heating.main_fuel_type == 33