5.1. SR 08-03-2009 - Laserfiche WebLink

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Elk River Library 10 0^ n n ~~ 00 ~o Optimize Energy Performance Design Application Elk River Library 1 /18/2008 Construction Application Credit 1-Version 2.2 9/20/2007 The applicant submitted a signed LEED Submittal Template, energy modeling output reports and utility rate information. The LEED Submittal Template indicates an energy cost savings of 47.6% in comparison to ASHRAE 90.1-2004 minimum requirements. Upon review of the LEED Submittal Template, a few issues were identified that need further clarification before credit achievement can be determined. The issues are: 1. In table 1.4, it appears the applicant calculated lighting power density using the allowable LPD and the space- by-space method, instead of the building area method. However, it is unclear how the baseline lighting power density of 1.53 W/sf was determined. 2. The fan supply volume listed in table 1.4 indicates differences between the supply rates in the proposed and baseline models. It is unclear from the documentation if the ventilation rates are identical in both models, per ASHRAE 90.1-2004 Section G3.1.2.5 requirements. TECHNICAL ADVICE: Please provide additional documentation addressing the issues identified above (i.e. calculations and/or excerpts from the energy model input). Refer to ASHRAE 90.1-2004 Section 9 and G3.1.2.5 for more information and guidance. Design Application 11/26/2007 The applicant submitted a revised LEED Submittal Template and an independent lighting power density calculation. The documentation addresses the issues stated in the preliminary review and supports the 47.6% energy cost savings claimed. On-Site Renewable Energy Enhanced Commissioning Enhanced Refrigerant Management Design Application Credit 2-Version 2.2 Credit 3-Version 2.2 Credit 4-Version 2.2 9/20/2007 The LEED Submittal Template indicates that the refrigerants selected for base building HVAC&R equipment have a combined refrigerant impact per ton of 35.3, below the allowable threshold of 100. Measurement & Verification Green Power Credit 5-Version 2.2 Credit 6-Version 2.2 Page 7 of 13