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MVPE committee forwards competing C406 credit packages to Council for rulemaking
Summary
After extended technical debate over PNNL modeling, baselines and east/west weighting, the MVPE committee directed staff to include PNNL modeling files in the CR102 package and forwarded two competing sets of C406 credit requirements (the David Reddy and Gregory Johnson proposals) to the Council for public comment and final decision.
In a lengthy virtual session of the MVPE advisory committee to the Building Code Council, members voted to forward PNNL’s updated C406 modeling and two competing credit-requirement methodologies to the Council for CR102 rulemaking and public comment. The decision keeps competing options on the table rather than the committee choosing a single recommendation.
The committee’s technical discussion centered on how many C406 points different building typologies should be required to meet, how point values map to percent energy savings, and which baseline should be used to measure progress. Kjell Anderson (LMN), who helped convene practitioners and engineers to review the modeling, summarized the process: PNNL ran energy models and the workgroup play‑tested credit values; “each point in C406 is worth 0.1% energy savings,” he said, and some measures still lack modeled thresholds.
Gregory Johnson (Avista),…
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