Khalim Conn-Kowlessar fe59c4d8a2 S0380.208: case 7 combi e2e fixture — condensing-oil-combi path validated exact ...

Adds simulated case 7: case 6 (P960-0001-001431) with the heating swapped
to a CONDENSING OIL COMBI (SAP code 130, Table 4b 82/73) and the cylinder
removed — combi instantaneous DHW (WHC 901), Table 3a keep-hot combi loss
(61) = 600 kWh/yr, no primary/storage loss, boiler interlock PRESENT (no
−5pp). This is the heating archetype golden cert 0240-0200-5706-2365-8010
uses, which case 6 (SAP code 127, a *regular* condensing oil boiler +
cylinder) never exercised.

The cascade reproduces the case-7 worksheet EXACTLY at abs=1e-4 on every
top-level SapResult output with ZERO calculator changes:
  (211) 7865.4304  (213) 7556.9821  (219) 3496.8121  (98c) 12646.3783
  (255) 1123.3372  (257) 1.9631     (272) 5738.9315  (258) 73
This validates the SAP 10.2 Appendix D Eq D1 combi efficiency blend +
Table 3a keep-hot combi loss + Table 4b code 130 (82/73) path, and
exonerates the combi mechanism as the source of 0240's API-path residual
— which therefore lives in 0240's fabric/demand or the API mapper.

Test-only slice (no impl change). New fixture file: 0 pyright errors.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-03 17:57:22 +00:00

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