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ventilation(): the cert lodges no extract-fan count and RdSAP 10 Table 5's age-band B default is 0, but the build entered 1 — inflating Elmhurst's own (8)/(21) infiltration lines relative to both the cert and our engine. space_heating(): switched from the generic "Combi condens" SAP-Table dialog code (84% efficiency, no PCDB record) to elmhurst_lib.set_pcdb_boiler(18908) via clear_main_heating_code — resolves the exact lodged product (Worcester Greenstar 4000, 88.70%) and its correct keep-hot classification (None), matching the SAP engine's own PCDB lookup and removing the "Standard Combi" keep-hot artifact the reused generic code carried. Also corrected the file's stale docstring (described a different property entirely — mid-terrace/250mm/DUAL meter/11 windows/lodged 63 — left over from a copy-paste). Verified against the refreshed worksheet: (21) shelter-adjusted ACH 0.6938 now EXACT vs our engine's ventilation_from_cert; (61) combi loss monthly kWh matches ours to ~0.01 kWh (was carrying a ~360 kWh/yr keep-hot artifact). Both open items from the PR #1439 handoff are resolved. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> |
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