mirror of
https://github.com/Hestia-Homes/Model.git
synced 2026-07-19 17:03:02 +00:00
34e52a893c
When the main heating system does not heat every habitable room (heated rooms < habitable rooms), SAP 10.2 Appendix A.2.2 assumes the unheated rooms are served by a portable-electric secondary heater, so the Table 11 secondary fraction (0.10 for a boiler main) must be costed at the electricity tariff — even when the cert lodges no explicit secondary system. `_secondary_fraction` previously returned 0 unless a secondary was lodged or the main was a forced-secondary electric-storage code, dropping the assumed secondary and billing 100% of space heat to the (cheaper) main fuel — an over-rate. Added an `unheated_habitable_rooms` trigger plus `_has_unheated_habitable_rooms(epc)`, which prefers the lodged `any_unheated_rooms` flag and guards the gov-API `heated_rooms_count == 0` "not provided" sentinel. The secondary fuel/efficiency cascade already defaults to portable electric (code 693) when no secondary code is lodged. Worksheet-validated on simulated case 46 (heated 4 < habitable 7, no lodged secondary): the assumed 10% electric secondary (2289 kWh, ~£260) lifted our SAP 39 -> 29.35 vs accredited Elmhurst 30 (cost £1502 vs £1493, within 0.6%). Corpus UNCHANGED (71.6% / MAE 0.819): all 17 corpus certs with heated < habitable already lodge an explicit secondary description, so the gov-API path was already costing it; this only adds the assumed secondary where none is lodged (Elmhurst / reduced-field path). pyright not installed locally. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
||
|---|---|---|
| .. | ||
| climate | ||
| rdsap | ||
| validation | ||
| worksheet | ||
| __init__.py | ||
| test_bre_worked_examples.py | ||
| test_calculator.py | ||
| test_pcdb_etl.py | ||
| test_pcdb_lookup.py | ||
| test_pcdb_table_322_lookup.py | ||
| test_pcdb_table_329_lookup.py | ||
| test_pcdb_table_362_lookup.py | ||
| test_postcode_weather.py | ||
| test_real_cert_sap_accuracy.py | ||
| test_table_12.py | ||
| test_table_12a.py | ||
| test_table_13.py | ||
| test_table_32.py | ||