Comprehensive Recommendations for Fan VFD Protocol Development

1. Fan VFD Standard Protocol Recommendation Regional Technical Forum September 17, 2013

2. Estimate of Fan VFD Market Potential

3. Estimate of Market Potential (continued) • Potential limited due to requirement of constant system curve in pre/post case • Similar concern expressed by subcommittee • Industrial potential limited to about 2 projects per year in BPA territory • Not enough to prove out a protocol in a timely fashion • Larger projects would likely warrant a detailed custom analysis • Would not generate more projects beyond status quo

4. Estimate of Market Potential (continued) • Commercial sector faces similar challenges • Dynamic system curve in post case • New construction market limited by code • Market potential small for CAV systems • Simplified method does not appear to provide practitioner with a better means of estimating savings reliably • Engineering judgment likely to be needed

5. Deciding on a Path Forward – Option 1 • Option 1 - Develop protocol and calculator to just do pre/post data entry and annualization • Essentially a Best Practice approach • Subcommittee agreed this made sense from technical standpoint • Need input from program implementers on usefulness in programs

6. Deciding on a Path Forward – Option 1 • Option 1 – Pros • Provides a regionally consistent method to do annualization and length of time for metering pre/post • Consistent with most utilities custom approach • Minor modifications needed to existing protocol and calculator • Option 1 – Cons • Still much variability on site by site basis; requires engineering judgment in most cases • Structured annualization tool might not be what programs are currently used to; will take some effort to conform to format and requirements • Subcommittee unsure of the benefit of this approach over a custom analysis by a qualified engineer

7. Deciding on a Path Forward – Option 2 • Option 2 – Reverts to custom analysis by program • Abandon Standard Protocol and associated savings calculator • Point to established M&V documents for evaluation Fan VFD savings • Guidelines provide high level guidance on custom measures

8. Deciding on a Path Forward – Option 2 • Option 2 – Pros • Provides program implementers and evaluators with a consistent guideline for many application variations • Doesn’t constrain programs to standardized data collection and calculation methodology • Option 2 – Cons • Still much variability on site by site basis; requires engineering judgment in most cases • Subcommittee concern that this is getting too deep into the M&V realm instead of focusing on savings estimation • Custom analysis from programs will likely vary even with guidance for each case

9. Deciding on a Path Forward – Option 3 • Option 3 - Develop the protocol and calculator as-is knowing that it is a niche application • Continue to develop other niche protocols as the need arises • Pros: • Retains a lot of work done already • Cons: • Long time projected to get enough provisional data to prove out simplest reliable method • Likely confusing and process heavy to update multiple protocols for many similar applications

10. RTF Decision • I recommend that the Fan VFD Standard Protocol be developed further under Option ______.