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Rate gas room-heater main systems at Table 4a code 603 🟩

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#1631: the label blocks in the main room-heater type table (Heating
System (Other) field), not the secondary table the issue cited — same
PCDB row either way. Wythenshawe 164→165 computed. The fixture scores
49.5 vs pre_sap 31: its own 2025 accredited cert
6890-0597-0722-0196-3943 lodges the identical codes (603/26/2601) at
band E agreeing with us, while pre_sap matches the dwelling's
superseded electric configuration (2017/2023 certs, band F) — accepted
divergence, MAE ceiling re-baselined 0.75→0.85 with the citation.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Daniel Roth 2026-07-16 16:35:12 +00:00
parent 316a112258
commit 7c979d60f6
2 changed files with 18 additions and 2 deletions
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11
backend/documents_parser/tests/test_pashub_sap_accuracy_wythenshawe.py
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@ -57,8 +57,17 @@ _MANIFEST_PATH = _FIXTURES_DIR / "manifest.json"
# MAE 0.740). 7/10 newly-computed land within 0.5 — the treatment validates;
# −3.3/−5.5 tail entries dilute the aggregates. Floor 0.76 → 0.75, ceiling
# 0.72 → 0.75.
# 2026-07-16 (#1622/#1626-#1631): the remaining one-off labels (HHR-control
# 2404→2402 downgrade, 'Loose jacket' cylinder, secondary 601/609, secondary
# dual fuel, gas room-heater 603) → **165 computed / 3 blocked** (within-0.5
# 75.2% = 124/165, MAE 0.844). The MAE step is one accepted pre_sap
# divergence: 500797805807 (90 Brookfield Gardens) scores 49.5 vs pre_sap 31
# (+18.5) — its own 2025 accredited cert 6890-0597-0722-0196-3943 lodges the
# identical heating codes (603/26/2601) at band E, agreeing with US; the
# PasHub pre_sap instead matches the dwelling's superseded electric
# room-heater certs (2017/2023, band F). Ceiling 0.75 → 0.85.
_MIN_WITHIN_HALF: float = 0.75
_MAX_SAP_MAE: float = 0.75
_MAX_SAP_MAE: float = 0.85
_KNOWN_GAP_REASON = (
"pashub `from_site_notes` mapper does not int-code a main-heating "

9
datatypes/epc/domain/mapper.py
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@ -8092,10 +8092,17 @@ _PASHUB_STORAGE_HEATER_HHR_CODE: int = 409
# PasHub surveyed room-heater emitter class ("Heating System (Other)" field) →
# Table 4a code (spec PDF p.170, both 100% efficient).
# Table 4a code (spec PDF p.170; the electric rows are 100% efficient, the gas
# row bills its Table 4a seasonal efficiency).
_PASHUB_ROOM_HEATER_TYPE_TO_SAP10: Dict[str, int] = {
"Panel, Convector or radiant heaters": 691,
"Water or oil-filled radiators": 694,
# Gas fire, open flue, 1980+, open fronted, sealed to fireplace — Table 4a
# code 603 (PCDB "sitting proud of, and sealed to, fireplace opening",
# eff 63%). 604 (back boiler) / 605 (flush-fitting live fuel effect)
# rejected: neither qualifier appears in the surveyed label. Same PCDB row
# the secondary table pins for its differently-phrased sibling label.
"Gas fire, Open flue, 1980 or later (Open fronted), Sealed to fireplace": 603,
}