Model/packages/domain
Khalim Conn-Kowlessar 1dcbdb28e6 §4 slice 4: hot_water_mixer_showers_monthly_l_per_day (line (42a)m)
Appendix J equations J1–J3. Per-day hot water draw for mixer showers
combines the per-day shower count (rising with N, depressed slightly
when a bath is also present) with each outlet's flow × 6 min × Table J5
behavioural factor, then multiplied by the cold-water-dependent hot
fraction (41 °C delivery vs 52 °C hot supply, Tcold from J1).

Multi-outlet handling: N_shower is split across outlets so a dwelling
with two identical mixers produces the same (42a)m total as a single
outlet — the count only matters when outlets have different flow rates.
Instantaneous electric showers belong in (64a)m and must be excluded
from the input.

Validated against the Elmhurst non-RR fixtures (both 1 vented mixer at
7 L/min, mains Tcold):
  - 000490 N=2.1468 → Jan V_d,hot = 52.6878
  - 000474 N=1.8896 → Jan V_d,hot = 48.9139

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 15:51:14 +00:00
..
src/domain §4 slice 4: hot_water_mixer_showers_monthly_l_per_day (line (42a)m) 2026-05-20 15:51:14 +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

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/.