Bill pre-1980 open-fronted gas fires at Table 4a code 601 (50%) 🟩

#1627: Wythenshawe 162→163 computed; within-0.5 75.5%, MAE 0.741 —
ratchets hold.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Daniel Roth 2026-07-16 16:26:08 +00:00
parent 951913f1de
commit 223edb0066

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@ -6691,6 +6691,10 @@ _PASHUB_SECONDARY_HEATING_TYPE_TO_SAP10: Dict[str, int] = {
# Gas room heaters (Table 4a column A).
"Flush fitting live fuel effect open front fire, sealed to fireplace": 605,
"1980 or later - Open front fire with open flue, sealed to fireplace": 603,
# Pre-1980 open-fronted gas fire, open flue, not sealed to the fireplace
# (no qualifier in the label) — PCDB 601, eff 50%. 602 (601 + back boiler)
# rejected: no back-boiler qualifier surveyed.
"Pre 1980 - Open front fire with open flue": 601,
# Solid fuel (eff 0.32 column B).
"Open fire in grate": 631,
}