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Updated Retrofit Engineering Worksheets

October 12, 2016

The following engineering worksheets have been updated by the Business Working Group to align the demand savings (kW) calculation with the Retrofit Program’s updated Project Measurement and Verification (M&V) Procedures:
 

  • Commercial Combined Lighting V6.0

  • VSD Compressed Air V6.0

  • VSD on Fan V6.0

  • VSD on Pump V6.0

  • Unitary AC V6.0

  • Lighting Controls V6.0

  • Compressed Air V6.0

The Retrofit Program’s Project M&V Procedures were updated June 20, 2016 to align the demand savings calculation with the Evaluation Protocols used by the IESO’s program evaluators. These updated worksheets are expected to result in more conservative assessments of demand savings. A comparison of the demand savings calculations between the current engineering worksheets, and those prior to June 20, 2016 is provided below:
 
Previous demand savings definition (prior to June 20, 2016):
Demand savings were determined as the maximum reduction in electricity demand between the base case and the energy efficient case occurring within the same hour, between 11am to 5pm, Monday to Friday, from June 1 to September 30.  Demand savings for weather dependent measures were considered as occurring at peak design load conditions.
 
Current demand savings definition:
Demand savings are determined as the average load reduction in electricity demand between the base case and the energy efficient case that occur between 1 pm to 7 pm, Monday to Friday, June 1 to August 31. Demand savings for weather dependent measures shall be considered as occurring at peak design load conditions.
 
In addition to the demand savings calculation updates, the updated engineering worksheets have also been enhanced to improve user experience and LDC administration.  The updated engineering worksheets will be available on the Save on Energy website by October 28, 2016, with an effective date of November 1, 2016.
 
The updated engineering worksheets may be submitted with new applications when made available on the Save on Energy website, and will formally replace the existing engineering worksheets on November 1, 2016.  Applications submitted before November 1, 2016 with the previous versions of the engineering worksheets will not be subject to the updated demand savings calculations.  Applications submitted afterNovember 1, 2016 with the previous engineering worksheets that have established intent to apply prior to November 1, 2016, may be accepted at the LDC’s discretion.

An overview of the changes to the engineering worksheets and impact of the new demand savings calculations will be provided during a webinar (Updated Retrofit Engineering Worksheets) scheduled for Tuesday, October 25, 2016 at 10am.

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