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Model/backend/epc_api/json_samples/real_life_examples
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Jun-te Kim 8e33a8de53 test(accuracy): ratchet 77.3% -> 77.7% via flat-roof insulation-thickness fix (Elmhurst-validated) 
A FLAT roof lodges its insulation thickness in the DEDICATED gov-EPC API
`flat_roof_insulation_thickness` field (e.g. "75mm"), leaving
`roof_insulation_thickness` None (that field is for pitched-loft joists).
`heat_transmission_from_cert` read only the latter, so a measured
flat-roof thickness was ignored and the roof billed at the uninsulated
age-band flat default (age E = 1.5) instead of its Table-16 insulated U.

Fixed by preferring `flat_roof_insulation_thickness` when the part is a
flat roof — the exact mirror of the existing rafter-thickness branch.
An "AB"/"NI" (as-built/unknown) value parses to None and keeps the
age-band default, unchanged; only measured thicknesses move.

PER-CERT ELMHURST VALIDATION (cert 47084930, top-floor flat, flat roof
75 mm): built on the lodged inputs in accredited Elmhurst RdSAP10-Online
(evidence saved: elmhurst_summary.pdf / elmhurst_worksheet.pdf). The
worksheet bills "insulated flat roof" at U 0.5 (floor 0.70 + wall 0.25
also matching the engine). The fix takes the engine roof 96.4 -> 32.1 W/K
(= 64.26 x 0.5, Elmhurst-exact), PE +47 -> +0.2, SAP 69.51 -> 74.34 =
lodged 74.

Gauge: within 77.3% -> 77.7%, SAP MAE 0.648 -> 0.641, CO2 0.074 -> 0.072,
PE 3.1 -> 2.97. Unit-pinned in test_heat_transmission
(flat_roof_insulation_thickness -> U 0.5); RealCertExpectation 47084930
= 74 (Elmhurst-validated). Also adds the build script build_47084930.py.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-02 23:27:57 +00:00
..
RdSAP-Schema-17.0 sap score and elmhirst mapper optimsaiation 2026-06-20 07:25:42 +00:00
RdSAP-Schema-17.1 updated sap scaema to take in inputs 2026-06-23 10:22:40 +00:00
RdSAP-Schema-18.0 Add UPRN 100020942571 (8 Booth Close) to the SAP accuracy corpus 2026-07-02 11:31:28 +00:00
RdSAP-Schema-19.0 Add SAP-18.0.0 + SAP-16.0 schema coverage; autonomous-run triage findings 2026-06-16 20:04:43 +00:00
RdSAP-Schema-20.0.0 test(accuracy): pin RdSAP-20.0.0 PV semi uprn_22086693 (PV-list fix corpus) 2026-06-23 16:13:34 +00:00
RdSAP-Schema-21.0.1 test(accuracy): ratchet 77.3% -> 77.7% via flat-roof insulation-thickness fix (Elmhurst-validated) 2026-07-02 23:27:57 +00:00
SAP-Schema-16.0 test(accuracy): pin SAP-16.0 storage-flat uprn_10070004512 (built_form fix corpus) 2026-06-23 15:35:06 +00:00
SAP-Schema-16.1/uprn_100021943298 more examples 2026-06-19 09:51:49 +00:00
SAP-Schema-16.2 sap score and elmhirst mapper optimsaiation 2026-06-20 07:25:42 +00:00
SAP-Schema-16.3 data types 2026-06-23 12:42:53 +00:00
SAP-Schema-17.0 neighbouring properties added 2026-06-22 14:38:00 +00:00
SAP-Schema-17.1 sap score and elmhirst mapper optimsaiation 2026-06-20 07:25:42 +00:00
SAP-Schema-18.0.0 Add SAP-18.0.0 + SAP-16.0 schema coverage; autonomous-run triage findings 2026-06-16 20:04:43 +00:00
SAP-Schema-19.1.0/uprn_10096028301 more examples 2026-06-19 09:51:49 +00:00