Oil A = (90.6, 82.8) [PCDB 17292 Firebird Enviromax Blue Supreme], B = (88.0, 80.2)
[PCDB 10498 Worcester Greenstar Danesmoor], applied to oil regular (127) + combi
(130). No separate oil Elmhurst build: the gas builds proved Elmhurst's worksheet
(206)/(217) for a database boiler == its PCDB winter/summer read verbatim (SAP 10.2
App D2.1), so the PCDB record is the accredited value. Corpus unmoved; 68 overlay
tests green (ADR-0068). Full A/B matrix (gas/LPG/biogas + oil) now live.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>