Model/datatypes
Khalim Conn-Kowlessar 597ca51dd9 Map PasHub water-heating fields for cylinder dwellings
`_map_sap_heating` set cylinder geometry/insulation but left
`water_heating_code` / `water_heating_fuel` / `immersion_heating_type`
None (and immersion as a raw label). For cylinder dwellings that loses
the HW-system typing the calculator's water cascade keys off.

Resolve them at the mapper boundary, gated on cylinder presence (combi
dwellings keep the None default so HW inherits the main system, unchanged):
- `water_heating_code` from the `system` label — "From main heating 1" -> 901,
  "Electric immersion" -> 903, community -> 950; strict-raises an unknown label.
- `water_heating_fuel` = standard electricity (30) for the electric-immersion
  WHC 903; None otherwise (901 inherits the main fuel).
- `immersion_heating_type` via the Elmhurst map (Single -> 2), cylinder-gated.

Combi-dominated cohort so the accuracy impact is negligible by design
(Tier 3): within-0.5 and MAE unchanged (12.9% / 2.56), harness still
206-xfail with no new hard failures.

Closes #1565

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 17:26:36 +00:00
..
epc Map PasHub water-heating fields for cylinder dwellings 2026-07-14 17:26:36 +00:00
__init__.py further breaking up code 2023-07-20 12:24:34 +01:00
address_match.py refactor(address2uprn): name the match/decision return types; rename helper 2026-07-07 16:00:00 +00:00
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