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Khalim Conn-Kowlessar fd0530159f feat(tariff): complete §12 Unknown-meter clause — GSHP/WSHP main triggers off-peak (RdSAP 10 PDF p.62) 
Closes the follow-up from 22fe4f41. RdSAP 10 §12's third Unknown-meter
exception bullet — "main heating is ground source or water source heat pump" —
was unimplemented. Add `_GROUND_OR_WATER_SOURCE_HEAT_PUMP_CODES` (Table 4a,
SAP 10.2 PDF p.176-177: ground 211/215/221/225 + warm-air 521/525; water
213/216/223/226 + warm-air 523/526) to the Unknown-meter off-peak triggers;
once dual, Rules 1-4 (Rule 3) resolve it to 10-hour.

AIR-source heat pumps (214/217/224/227, 524/527) are deliberately EXCLUDED —
the spec names only ground/water source. Verified the only Unknown-meter heat
pumps in the corpus are "3/10 Bedford House" (main 214 = AIR source), which
correctly KEEP STANDARD. 0 corpus certs carry a GSHP/WSHP on an Unknown meter,
so this is a spec-completeness forward guard (gauge unchanged 72.5% / 0.789),
same family as the Scotland-J wall / rafters-M roof 0-impact spec fixes.
Coverage gap noted in-code: a database-index heat pump without a 211/213-style
SAP code can't have its source type read from the code alone (rare).

Spec-pinned (test_unknown_meter_ground_or_water_source_heat_pump_triggers_off_
peak). Gates green: corpus 72.5%/0.789, batch worksheet 0 raised/0 diverge,
suite 2989 passed (2 known pre-existing fails). pyright not installed locally.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-23 10:09:59 +00:00
..
addresses standardist Address 2026-05-22 10:13:32 +00:00
billing refactor(billing): relocate Bill Derivation to domain/billing/ (cross-stage) 2026-06-03 17:19:23 +00:00
epc move overlas to its own thing 2026-06-18 10:04:14 +00:00
epc_prediction sap calculator variaince changes 2026-06-18 10:22:21 +00:00
fuel_rates feat(fuel-rates): FuelRates snapshot + repository foundation (ADR-0014) 2026-06-02 09:29:07 +00:00
magicplan handle 50 rows in new template file 2026-06-10 16:18:46 +00:00
modelling fix(climate): compute EPC CO2/PE on the postcode demand cascade (SAP 10.2 Appendix U p.124) 2026-06-18 14:15:34 +00:00
property move overlas to its own thing 2026-06-18 10:04:14 +00:00
property_baseline feat(baseline): sap_code_to_fuel normalizes via the calculator's own helper 2026-06-05 18:59:25 +00:00
sap10_calculator feat(tariff): complete §12 Unknown-meter clause — GSHP/WSHP main triggers off-peak (RdSAP 10 PDF p.62) 2026-06-23 10:09:59 +00:00
tasks tests framework completed 2026-05-20 14:00:19 +00:00
__init__.py added postcode splitter rewrite to ddd 2026-05-19 16:35:09 +00:00
test_building_geometry.py feat(modelling): floor Recommendation Generator + ground-floor-area geometry 2026-06-03 09:12:29 +00:00
test_postcode.py tests framework completed 2026-05-20 14:00:19 +00:00