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Khalim Conn-Kowlessar 049694e1e6 Slice 29: §9a energy requirements cascade pin (72/72) 
Adds `energy_requirements_section_from_cert(epc)` to the cert→inputs
cascade. Composes §8 (98c)m + Table 11 secondary fraction + per-system
efficiencies into (201)..(221) line refs via the existing
`space_heating_fuel_monthly_kwh` orchestrator.

Extracts `_main_heating_efficiency(epc)` as a shared helper — same eff
derivation as the inline `cert_to_inputs` flow (PCDB winter override →
Table 4a/4b seasonal → heat-network 1/DLF override). Single source of
truth for §4 and §9a.

Worksheet display convention: when no secondary system is lodged the
PDF displays (208) = 0 (not the fallback 100% electric efficiency). The
per-system fuel formula already collapses to 0 via fraction_201 = 0, so
this is presentation-only; the helper zeros (208) when
`secondary_fraction == 0`. 000474 (no secondary) now matches exactly.

Adds §9a LINE_ constants to all 6 fixtures — (201), (202), (206), (207),
(208), (211)m, (211), (213)m, (213), (215)m, (215), (221). Extracted
from `sap worksheets/U985-0001-NNNNNN.txt` PDF blocks.

Cascade scoreboard: 396/396 → 468/468 (§7..§9a closed).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-24 00:16:12 +00:00
..
src/domain Slice 29: §9a energy requirements cascade pin (72/72) 2026-05-24 00:16:12 +00:00
pyproject.toml slice 13: to_rows(properties) returns pd.DataFrame 2026-05-16 16:43:28 +00:00
README.md added potential file scaffolding: 2026-05-15 10:56:53 +00:00

README.md

domna-domain

Shared domain types — Property, Properties, BaselinePerformance, Plan, PlanPhase, Scenario, ScenarioPhase, ScenarioSnapshot, Recommendation, OptimisedPackage, EpcPropertyData, etc.

Boundary: types only. No persistence, no IO, no business logic. Other packages and services depend on domna-domain; this package depends on nothing internal.

Domain definitions live in ../../CONTEXT.md. New types added here must match the glossary terms.

Layout

src/domain/
├── __init__.py
├── property.py             # Property, Properties, PropertyIdentity
├── site_notes.py
├── landlord_overrides.py
├── baseline_performance.py # lodged + effective pair (ADR-0004)
├── plan.py                 # Plan, PlanPhase, OptimisedPackage
├── scenario.py             # Scenario, ScenarioPhase, ScenarioSnapshot (ADR-0005)
├── recommendation.py
├── geospatial.py
├── solar.py
├── anomaly_flags.py
└── ml/
    ├── __init__.py
    ├── transform.py        # EpcMlTransform (versioned per §8.3)
    └── schema.py

When datatypes/epc/domain/ folds in, the EPC schema types move under src/domain/epc/.