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test(accuracy): ratchet after HP water-heating 100% floor 🟪

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The Appendix N3.7 water-heating 100% floor drops corpus MAE 0.726 -> 0.721
and lifts within-0.5 74.1% -> 74.2% on the 1000-cert RdSAP-21.0.1 sample
(cert 100110101713 moves inside +-0.5). Tighten the MAE ceiling to 0.722 and
the within-0.5 floor to 0.742, and log the slice.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Khalim Conn-Kowlessar 2026-06-29 15:40:53 +00:00
parent dbaf3c49e2
commit 8914496456
1 changed files with 11 additions and 2 deletions
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tests/infrastructure/epc_client/test_sap_accuracy_corpus.py
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@ -193,7 +193,10 @@ _CORPUS = Path(
# within-0.5 71.6% -> 72.5%, MAE 0.819 -> 0.815. Surfaced by Khalim's Elmhurst
# stress worksheet (simulated case 46): closed its last ventilation residual
# (our Jan ACH 9.14 -> 9.0748 exact; SAP 29 -> 30 = accredited Elmhurst).
_MIN_WITHIN_HALF_SAP = 0.74
# 0.74 -> 0.742 via the heat-pump water-heating 100% floor (App N3.7): cert
# 100110101713 moves inside +-0.5 (|err| 4.97 -> 0.49). See the _MAX_SAP_MAE
# log below for the paired space-heating PSR-extension + water-floor slices.
_MIN_WITHIN_HALF_SAP = 0.742
# 0.793 -> 0.789 via the §12 Unknown-meter + dual-electric-immersion off-peak
# trigger (RdSAP 10 PDF p.62): Apartment 241 (main 691 + 903 dual immersion)
# -5.38 -> -1.05. Worksheet-validated on "simulated case 48" (Elmhurst SAP 57,
@ -257,7 +260,13 @@ _MIN_WITHIN_HALF_SAP = 0.74
# 3.107 over largest 2.0): (206) 334.4% -> 139.66% = Elmhurst exact. Only two
# certs move (both oversized-PSR heat pumps): 100110101713 +18.32 -> -4.97 and
# 4510053280 -0.61; within-0.5 holds at 74.1%.
_MAX_SAP_MAE = 0.726
# Then 0.726 -> 0.722 (within-0.5 74.1% -> 74.2%) via the heat-pump water-
# heating 100% floor (SAP 10.2 Appendix N3.7, PDF p.109: in-use x eta_water
# subject to a minimum efficiency of 100%). Only 100110101713 moves: its
# oversized-PSR water eff 0.60 x 128.55% = 77.13% is floored to 100% (=
# accredited Elmhurst (216)), taking the cert 68.03 -> 72.51 (|err| 4.97 ->
# 0.49, now inside +-0.5). In-range heat pumps keep their > 100% water COP.
_MAX_SAP_MAE = 0.722
_MAX_CO2_MAE_TONNES = 0.09 # t CO2 / yr vs co2_emissions_current
_MAX_PE_PER_M2_MAE = 3.5 # kWh / m2 / yr vs energy_consumption_current