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CH6's P960 worksheet input lodges Distribution Loss = "Two adjoining dwellings sharing a single heating system" → (306) DLF = 1.0000, vs CH4's "Calculated" → 1.5 → (306) = 1.4500. That DLF choice swings SAP/cost/CO2/PE materially, but it is NOT present in the Summary PDF that the corpus pipeline consumes (Summary → ElmhurstSiteNotesExtractor → mapper → calculator). Proven empirically with a user-supplied controlled pair (CH adjoined dwellings/Summary_001431 (1) vs (2)): the two Summaries are byte-identical across every RdSAP INPUT field, differing only in the derived header (SAP 80 vs 75, bill £954 vs £1237, emissions 5.407 vs 7.394 t). A case-insensitive scan of the CH6 Summary for "distribution"/"adjoin" returns 0 hits. Since CH4/CH6 Summaries are themselves identical bar fuel type, no Summary-derivable rule can yield CH4=1.45 AND CH6=1.0. Doc-only change (comment in _EXPECTATIONS); 20/20 community-heating corpus tests pass. Closes the CH6 re-litigation: pin held. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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| .. | ||
| fixtures | ||
| __init__.py | ||
| test_elmhurst_end_to_end.py | ||
| test_elmhurst_extractor.py | ||
| test_end_to_end.py | ||
| test_extractor.py | ||
| test_heating_systems_corpus.py | ||
| test_pdf.py | ||
| test_summary_pdf_mapper_chain.py | ||