As stated in the administrative posting dated 6/21/2008: "Any energy produced from the eligible fuels qualifies for points in EAc2, and any energy produced from the ineligible fuels does not qualify." We are looking for clarification on how to determine the qualifying fuels contribution to the credit criteria. Our project looks to use bio-diesel fired boilers with absorptive chillers to accommodate both the heating and cooling loads for the building. The LEED reference guide standards allow for the use of bio-diesel but does not specify what blend of bio-diesel is necessary to qualify for the credit or how to calculate the contribution. Based on the administrative ruling, we propose that the qualifying percentage of bio-based diesel vs. traditional diesel in the blend be used to determine the level of contribution EAc2. For example, if a B20 bio-diesel blend is used (20% bio/80% traditional diesel)then 20% of the energy produced by the bio-diesel is applicable towards the EAc2 Renewable Energy credit thresholds. If B100 is used, then 100% of the energy is applicable. Please advise if this compliance path is acceptable.
The applicant is requesting clarification regarding whether energy production from bio-diesel may be used to achieve credit for EAc2. Only 100% bio-diesel fuel (i.e., B100) may be considered as an eligible bio-fuel. In order to satisfy the credit intent, the project team must demonstrate a 2 year commitment to the use of B100 bio-diesel. Please note that the EA TAG committee will provide a more comprehensive definition of eligible renewable sources in the future that may supersede this ruling. Applicable Internationally.