Proposed Rooftop HVAC

Standardized Field Measurement Protocol and

Annual Savings Calculator

RTUG REVIEW

January 31, 2012

RTUG AgendaJanuary 31, 2012

• Summary of the RTUG Subcommittee and contractors discussions to date

• Discussion of the draft protocol

• Presentation of the calculator including changes since last meeting

• Additional RTUG review prior to RTF review February 14

• Questions the RTUG might pose to RTF

RTUG Issues Raised

22 annual sites plot Confidence level Weather data comparison Cost of metering Cost-effectiveness How does the protocol meet RTF guideline standards?

- What level of proof is needed? Is there a way to structure the protocol to allow for flexibility in

addressing component measures? Additional measures? VSD, DCV (Y/N), heat pumps –RTF work

underway, Premium Ventilation package, other… Need program evaluation criteria to support the protocol Calculator

RTU Protocol Confidence Limits

• Confidence limits are normalized relative to annual energy• Confidence limits highest for metering periods starting in late June to

mid-July• Confidence limits of +- 5% are achieved with metering periods starting

in late May and early August

RTU M&V Field Protocol

1. Definition of Key Terms

2. Eligible RTU Upgrades

3. Required Knowledge and Skills of Practitioner

4. Required Data Logger Commissioning1. One Time Site Measurements and Descriptions

2. Data Logger Measurements

3. TMY3 Weather Data

1. Savings Estimation Steps

2. Sampling Procedure

3. Relationship to Other Protocols and Guidelines

4. Estimate of Typical M&V Cost

Annualized Energy Use / SavingsCalculator

Next Steps

RTUG Subcommittee recommendations for RTUG review prior to February 14 RTF review

Questions or issues that RTUG participants might want to pose to the RTF in February