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Khalim Conn-Kowlessar 5cc68ab3fd §4 slice 2: hot_water_other_uses_monthly_l_per_day (line (42c)m) 
Appendix J equation J11 — daily hot water use for non-shower / non-bath
purposes (sinks, dishwashers, etc.) is annual-avg V_d,other,ave = 9.8 ×
N + 14, modulated month-by-month by the Table J2 monthly factors and
reduced by 5% when the dwelling meets the 125 L/person/day water-use
target.

Validated against both Elmhurst non-RR fixtures to better than 1e-3 L:
  - 000490 N=2.1468 → V_d,other,ave ≈ 35.04, Jan = 38.5426
  - 000474 N=1.8896 → V_d,other,ave ≈ 32.52, Jan = 35.7697

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 15:43:56 +00:00
..
domain §4 slice 2: hot_water_other_uses_monthly_l_per_day (line (42c)m) 2026-05-20 15:43:56 +00:00
fetchers added potential file scaffolding: 2026-05-15 10:56:53 +00:00
repos added potential file scaffolding: 2026-05-15 10:56:53 +00:00
utils added potential file scaffolding: 2026-05-15 10:56:53 +00:00
README.md added potential file scaffolding: 2026-05-15 10:56:53 +00:00

README.md

Shared packages

Workspace packages consumed by services/*. Each package is its own Python distribution with its own pyproject.toml; services import via the workspace dependency mechanism ({ workspace = true }).

Package Purpose
domain/ Shared domain types — Property, BaselinePerformance, Plan, Scenario, EpcPropertyData, etc. No persistence, no IO, no business logic.
repos/ Persistence layer — one repo per aggregate. Owns the SQL. Depends on domain.
fetchers/ External API clients (gov EPC, Ofgem, Google Solar, etc.). Depend on domain for response shapes.
utils/ Cross-cutting infra — logging, S3, CloudWatch URL builders, SQS task helpers.

Adding a new shared package

Only when a real second consumer materialises. Don't pre-shatter (repos-epc, repos-property, ...) — split when a deployment needs to drop a dep, not before.

See ../ara_backend_design.md §11 for the broader monorepo layout and ../CONTEXT.md for the domain glossary that names the types living in domain/.