The following will be allowed as an alternative compliance path for buildings where manufacturing or industrial processes comprise more than 60% of the total project energy consumption, AND where the project is not eligible for an ENERGY STAR rating:
- Provide documentation showing that the process energy consumption associated with manufacturing or industrial processes comprise more than 60% of the total project energy consumption. This analysis should be based on submetered data or an engineering analysis.
- Submeter the energy consumption for any portions of the building that could achieve an ENERGY STAR rating if they were stand-alone buildings (e.g. office, warehouse, etc.) separately from the remainder of the facility. Document that the ENERGY STAR score for this portion of the building meets the minimum requirements of EA Prerequisite 2.
- Collect 3 consecutive years of historical energy use data for the facility. The 3 years of data must fall within 6 years of the beginning of the application performance period.
- Collect a minimum of 1 year of current energy use data. The entire performance period must be included in the current year data if the performance period is less than one year.
- Identify the most appropriate metric for determining the source energy use intensity for the remainder of the facility relative to the manufacturing process (i.e. Btu/pound or Btu/unit – if using a different metric, please submit a CIR to confirm whether the metric is acceptable). Determine the energy use intensity for each historical year of data, and for the current year of data based on this metric.
- Normalize the production-based energy intensity metrics for other factors as applicable. Each year of historical data should be normalized based on the current year conditions. Examples include:
-- Normalization for weather data if the process loads are directly tied to weather data (e.g. refrigeration)
-- Normalization for process equipment that does not change in response to varying production capacities (e.g. burners that have the same energy output per hour of operation regardless of the pounds of product produced). A supplemental narrative should confirm that the production equipment does not have the capability to limit the energy output in response to production capacity, and any retrofit or add-ons to the equipment that would allow the energy output to be limited in response to production capacity has a simple payback period (based on energy cost savings) of ten years or longer.
- Average the normalized production-based energy intensity for the previous three years of data.
- Document a minimum 5%* improvement in the Current Annual Energy Use beyond the historical average energy use.
One additional point beyond the minimum prerequisite requirements shall be awarded for every additional 2% improvement documented in the Current Annual Energy Use.
**Updated 10/1/2013: Replace Bullet 2 with the following: Submeter all major energy sources serving any contiguous areas of the building that are 5,000 sf or greater, are one of the building types eligible for an ENERGY STAR rating, operate independently from the manufacturing areas such as supporting office or warehouse spaces, and are served by dedicated HVAC systems. These spaces must be entered into ENERGY STAR as if they were standalone buildings and demonstrate that they meet the minimum requirements of EA Prerequisite 2. Note that all spaces meeting the above criteria must be separately entered into ENERGY STAR and demonstrate EAp2 compliance. Energy sources that are calculated or measured to represent less than 5% of one of the ENERGY STAR eligible space’s energy use can forgo submetering if the entire energy source is included in the ENERGY STAR documentation (for example if domestic hot water is less than 5% of the office area’s energy use, it may forgo submetering if the entire building’s domestic hot water energy use is included in the ENERGY STAR rating for the office portion).