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Cert 2225 (Mitsubishi PUZ-WM50VHA, semi-detached 2-bp, TFA 82.49) lodges `sap_heating.shower_outlets = None` in the Open EPC API JSON. The worksheet (42a) "Hot water usage for mixer showers" reads 0 every month — Elmhurst's convention is "absent ⇒ no shower". Pre-fix the API mapper returned `mixer_shower_count = None`, deferring to the cert→inputs cascade's "RdSAP modal lodging" default of 1 vented mixer. That added ~7 L/day to (44) daily HW use, ~113 kWh/yr to (62) HW demand, and shifted cert 2225's SAP residual from -0.31 → +0.04 (now aligned with the cohort's +0.03..+0.06 cluster) once the mapper returns 0. `_count_shower_outlets_by_type` now treats None as 0 (the API mapper-only path). The cert→inputs cascade's `_mixer_shower_flow_rates_from_cert` keeps the None→1 default for the Elmhurst hand-built fixture path that doesn't route through this helper. Cohort impact: 6 of 7 ASHP certs now cluster at SAP Δ +0.03 to +0.06 (vs worksheet); only cert 2636 remains an outlier (+0.49). Golden cert PE/CO2 pins re-pinned for 6035, 8135, 0390 (the three certs that previously lodged shower_outlets=None and consumed the spurious 1-mixer default). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> |
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| .. | ||
| handler | ||
| tests | ||
| __init__.py | ||
| db_writer.py | ||
| elmhurst_extractor.py | ||
| extractor.py | ||
| local_runner.py | ||
| parser.py | ||
| pdf.py | ||