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d769f4488a
RdSAP 10 Specification (10-06-2025) §5.2.5: "If a dwelling or part of a
dwelling has commercial premises above record as another dwelling
above" — so code 9 ("another premises above") must get the same
zero-heat-loss treatment as code 7 ("another dwelling above"), per the
spec's own "there is no heat loss through the roof of a building part
that has the same dwelling above or another dwelling above."
The previous fix mapped both to None, which only avoided the mapper
crash — it didn't achieve zero heat loss. heat_transmission.py's
per-part suppression (part_roof_is_party) only fires when
roof_construction_type CONTAINS the literal string "another dwelling
above"; that string was only ever set on the Elmhurst ingestion path.
The API path mapped 7 (and, until now, 9) to None, so the suppression
never fired for any API-derived cert — has_exposed_roof (the
dwelling_type-label-only fallback) was the sole gate, with no way to
know about a per-part party-ceiling lodgement. Both codes now map to
"(another dwelling above)" so the existing suppression logic fires on
both ingestion paths, matching what
domain/epc/property_overrides/roof_party_ceiling_guard.py already does
independently for the landlord-override pipeline (same spec citation).
Verified against the motivating cert (uprn 10013320122): roof_w_per_k
now correctly computes to 0.0. Full RdSAP-21.0.1 corpus (1000 certs)
re-run: within-0.5 unchanged at 77.8%, MAE improves marginally
(0.6364 vs 0.637 ceiling) — no regression.
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| .. | ||
| domain | ||
| loaders | ||
| schema | ||
| search | ||
| surveys | ||
| __init__.py | ||
| construction_age_band.py | ||
| efficiency.py | ||
| floor.py | ||
| fuel.py | ||
| heating_controls.py | ||
| hotwater.py | ||
| main_heating.py | ||
| property_type_built_form.py | ||
| roof.py | ||
| walls.py | ||
| windows.py | ||