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Committee advances two ERI tables for Washington residential code; renewables accounting deferred
Summary
The MVPE advanced two primary R408 ERI target tables (R408.51 and R408.52) to the Council for CR102 after PNNL modeling of housing prototypes; the committee deferred final decisions about how on-site renewables should count in ERI scoring for further analysis and public comment.
The MVPE committee voted to forward two primary ERI target tables for Washington’s residential compliance path (the tables labeled R408.51 and R408.52 in staff materials) to the full Council for inclusion in the CR102 rulemaking package. The tables summarize PNNL’s modeled Energy Rating Index (ERI) targets across multiple home sizes and heating‑system types.
Kevin Rose (Northwest Energy Efficiency Alliance) told the committee that NEEA contracted PNNL to model roughly 300 prototype homes across 11 home classes, five system types, two climate zones and two foundation types; for each prototype, the modeling generated an ERI value consistent…
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