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Third slice of the SAP10 Calculator Session A (ADR-0009). Ports the SAP 10.2 / RdSAP10 §4.1 air-change-rate worksheet for the no-pressure-test path. Returns an InfiltrationBreakdown carrying each named worksheet line so callers can audit per SAP convention: (8) openings_ach — Table 2.1 rate × count / volume (10) additional_ach — (storey_count − 1) × 0.1 (11) structural_ach — 0.25 steel/timber-frame, 0.35 masonry (12) floor_ach — 0.2 unsealed timber / 0.1 sealed / 0 (13) draught_lobby_ach — 0.05 absent, 0.0 present (15) window_ach — 0.25 − 0.2 × (pct_dp / 100) (16) total_ach — sum of all of the above Table 2.1 rates: open chimney 80, open flue 20, closed-fire chimney 10, solid-fuel-boiler chimney 20, other-heater chimney 35, blocked chimney 20, intermittent fan 10, passive vent 10, flueless gas fire 40 (all m³/hour per opening). 9 AAA cycles cover the baseline calculation, each Table 2.1 opening contribution, frame-vs-masonry structural baseline, suspended-timber floor sealed/unsealed split, draught-lobby presence, window draught- proofing scale, multi-opening aggregation, and volume_m3 ≤ 0 validation. Pressure-test override (worksheet lines 17-21) and mechanical-ventilation adjustments (Table 4g, n_eff formula §2.6.6) are out of scope for this slice — separate later slices per ADR-0009. |
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| .. | ||
| src/domain | ||
| pyproject.toml | ||
| 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/.