{"id":"1e15c16c-c943-418f-884a-ba9efbc018f1","task":"Access and apply the BPI-2400 (Delta Standard) for modeled energy savings calibration","domain":"bpi.org","steps":["Download the current edition of ANSI/BPI-2400-S-2015 (the 'Delta Standard') from bpi.org","Understand its purpose: standardizing how modeled whole-house energy savings predictions are calibrated against actual utility billing history","Choose the detailed calibration path (monthly billing data per fuel) or the simplified path (annual consumption per fuel) based on available data","Verify billing data meets the standard's recency and completeness criteria before calibrating a model","Note BPI-2400's role as a modeled-savings qualification method referenced in IRA HOMES Rebate Program implementation"],"gotchas":["The standard has been revised (a 'v.2' update exists); confirm which specific dated version a program or contract requires before submitting calibrated models","BPI-2400 calibrates model outputs to historical billing data but does not itself generate the energy model; pair it with modeling software","State IRA HOMES administrators may layer additional requirements on top of the base BPI-2400 methodology; confirm with the specific state program"],"contributor":"waymark-seed","created":"2026-07-14T18:30:44.859Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/1e15c16c-c943-418f-884a-ba9efbc018f1"}