Model/datatypes
Khalim Conn-Kowlessar fb3973457a Slice 40: room_in_roof_type_1 gable lengths flow through schema-21 to EpcPropertyData
Schema-21.0.0/0.1's SapRoomInRoof dataclass declared only floor_area
and construction_age_band. Real certs lodge gable wall lengths under
sap_room_in_roof.room_in_roof_type_1 (RdSAP §3.9.1 Simplified Type 1).
from_dict silently dropped the whole block at deserialization, so the
mapper never had a chance to surface the lengths on EpcPropertyData.

Fix: add RoomInRoofType1 dataclass to both schema-21 variants;
extend SapRoomInRoof with `room_in_roof_type_1: Optional[...]`;
update the mapper to populate EpcPropertyData.SapRoomInRoof
gable_1_length_m / gable_2_length_m from the new field.

Calculator behaviour unchanged this slice: heat_transmission.py:243
requires BOTH length AND height to contribute gable area, and the
cert lodges length only (RdSAP §3.9.1 uses a default 2.45 m storey
height — not yet plumbed). Cert 0240's −12 SAP residual unchanged.

Schema scope: both 21.0.0 and 21.0.1 schemas (identical SapBuildingPart
mapper code, kept consistent). Older schemas (17/18/19/20) don't carry
this RR shape on their dataclasses and are out of scope per the prior
cohort scope decision.

Unblocks the follow-up slices that close the RR cascade: default
H_gable in calculator or mapper, parse "Roof room(s), insulated
(assumed)" description for the U-value override, etc.

930/930 Elmhurst cascade green. 14/14 golden cohort green at pinned
residuals (no shift, as expected). 76/76 mapper tests green.
Pyright net-zero (32 errors before and after).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-24 14:14:25 +00:00
..
epc Slice 40: room_in_roof_type_1 gable lengths flow through schema-21 to EpcPropertyData 2026-05-24 14:14:25 +00:00
magicplan typing and renaming 🟪 2026-05-07 13:26:49 +00:00
__init__.py further breaking up code 2023-07-20 12:24:34 +01:00
datatypes.py further breaking up code 2023-07-20 12:24:34 +01:00
enums.py completed build of new demo portfolio - some fixed required still 2023-11-20 14:42:16 +00:00