Khalim Conn-Kowlessar 86226ebdb6 Slice S0380.31: deduct alt-wall window opening from (31) net external area — closes cert 2636 cantilever residual -0.015 → -2.4e-6 ... SAP 10.2 Appendix K eqn (K2) p.84: HTB = y × Σ(Aexp) where Aexp is "the total area of external elements calculated at worksheet (31)". The worksheet (31) column header reads "Total NET area of external elements" — net of openings. Cert 2636 (dr87-0001-000898 line 187): (31) = 160.33 m² = 47.70 main net + 11.57 alt net + 42.92 roof + 39.18 ground floor + 3.74 cantilever + 11.52 windows + 3.70 doors. Pre-fix cascade summed the alt-wall at its 12.76 m² gross (no opening deduction) — (31) was 161.52, driving (36) to 24.228 vs worksheet 24.0495 (Δ +0.1785 W/K). That drift propagated through (39) HTC → MIT → space heating, leaving cert 2636 at Δ -0.015 SAP — the only ASHP cohort cert above the 1e-4 floor. `alt_walls_total_area` aggregates per-alt-wall gross at line 736; this slice subtracts `alt_window_area` from it in the (31) sum so the alt-wall contribution is net, matching the (29a) net-area convention already applied per-element to the A×U sums. Cohort-1 ASHP cohort: 9/9 certs < 1e-4 Summary path (was 8/9 with cert 2636 at -0.015). Cert 2636 API path also closes to < 1e-4 — the bug was path-symmetric in the cascade, not in either mapper. Cohort-2 unchanged at 33 exact + 5 ≤0.07. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>		2026-05-28 14:10:11 +00:00
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addresses	get rid of comments	2026-05-20 13:21:11 +00:00
sap10_calculator	Slice S0380.31: deduct alt-wall window opening from (31) net external area — closes cert 2636 cantilever residual -0.015 → -2.4e-6	2026-05-28 14:10:11 +00:00
sap10_ml	Slice S0380.26: RdSAP10 §5.8 dry-lining adjustment on alt walls — closes cert 7700 -0.44 → +5e-5	2026-05-28 10:56:11 +00:00
tasks	added postcode splitter rewrite to ddd	2026-05-19 16:35:09 +00:00
postcode.py	get rid of comments	2026-05-20 13:21:11 +00:00