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00921f71e8
SAP 10.2 Table 3 (PDF p.160) verbatim: "For heat networks apply the formula above with p = 1.0 and h = 3 for all months." The primary circulation hours for a heat-network main are fixed at h=3 winter and summer, independent of the cylinder-thermostat / separate-timing lodgement that selects the h=5/h=11 rows for boiler systems. `primary_loss_monthly_kwh` / `primary_circuit_hours_per_day_table_3` gain a `heat_network` flag (→ (3, 3)); `_primary_loss_override` passes `_is_heat_network_main(main)`. p=1.0 was already pinned via `_HEAT_NETWORK_PIPEWORK_INSULATION_FRACTION`; only the hours were wrong. Before, cert 8536 routed through the h=5/3 row because its community biomass DHW fuel (31) collides with electricity code 31, so `_separately_timed_dhw` returned False. The Table 3 heat-network rule overrides that path: 8536 primary loss (59) 335.81 → 273.90, EXACT to the faithful case-32 worksheet (storage (56) 376.58 also matches 376.94). API eval within-0.5 57.0% → 56.9% (one offsetting-error cert crosses out; signed err −0.205 → −0.202). Applied spec-uniformly per the determinism principle — the heat-network primary hours are unambiguous. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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| addresses | ||
| data_transformation | ||
| epc | ||
| fuel_rates | ||
| geospatial | ||
| property | ||
| property_baseline | ||
| sap10_calculator | ||
| sap10_ml | ||
| tasks | ||
| postcode.py | ||