junte/Model
1
0
Fork 0
mirror of https://github.com/Hestia-Homes/Model.git synced 2026-06-08 11:17:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions
Model/packages
History
Khalim Conn-Kowlessar 5e34594d8a Cohort residual slice 18a: sap_heating lodgement on 000480 / 487 / 516 
Wires PCDB main heating index + secondary heating type into the three
open fixtures. All three certs lodge:
- Vaillant ecoTEC PCDB index (000480=16839 pro 28, 000487=18119
  sustain 28, 000516=18118 sustain 24) at main_heating_data_source=1.
- Electricity Electric Panel/convector secondary (SAP code 691) at
  Table 11 fraction 0.10 (gas main + any secondary, page 188).
- number_baths (000480=0, 000487=1, 000516=1).

Confirmed against SAP 10.2 (14-03-2025) Table 11 page 188: "All gas,
liquid and solid fuel systems" main + "all secondary systems" →
fraction 0.10. PDF arithmetic on each fixture matches:
  000480: 12398.58 × 0.10 = 1239.86 kWh secondary ✓
  000487: 10834.78 × 0.10 = 1083.48 kWh secondary ✓
  000516: 12410.32 × 0.10 = 1241.03 kWh secondary ✓

Impact on continuous SAP delta (target <0.01):

  fixture | pre S18a | post S18a | status
  --------|----------|-----------|---------
  000480  |  +7.0885 |  +0.0012  | ✓ within 0.01
  000487  |  +5.5285 |  -1.9586  | over-corrected
  000516  |  +6.8375 |  +0.0349  | nearly closed (0.04)

000480 hits the 0.01 continuous gate — first time outside 000490.
000516 is within 0.04 (was +6.84). 000487 swung from +5.5 to -2.0,
suggesting the PCDB 18119 efficiency cascade diverges from what the
PDF assumes for that specific boiler — separate slice.

The previous fixture-lodgement gap was the dominant cost residual:
(242) secondary cost was £0 and (240) main heating was over-counting
because no PCDB efficiency was applied. Both close in this slice.
The remaining (251) standing charges (£120) gap is a calculator-side
issue addressed in the next slice (Table 12a page 191).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-22 22:10:24 +00:00
..
domain Cohort residual slice 18a: sap_heating lodgement on 000480 / 487 / 516 2026-05-22 22:10:24 +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/.