2019-05-02-PBC-min - Laserfiche WebLink

Browse Search

• The new building will serve as an emergency facility for the Town and will be resilient to natural disasters and other threats. Lexington Sustainable Design Goals and LEED Credit Status • The project will be designed with respect to the sustainable design goals established by the Town of Lexington. The meeting referred to the LEEDv4 for New Construction rating system modified with Lexington specific requirements (L Lex 1-7). • The LEEDv4 rating system acted as a framework to guide design decisions but the project is not pursuing formal LEED certification. • Below please find a summary of significant discussions regarding specific sustainability goals. Some of these items may require follow up from various team members. ENERGY AND ATMOSPHERE L Lex 1 and LEED EAp1 and EAc1: Fundamental and Enhanced Commissioning and Verification • The project team intends to conduct Fundamental Commissioning and HVAC Commissioning in accordance with LEEDv4 criteria. Building Envelope Commissioning was discussed as a possibility. Monitoring based commissioning was discussed in order to monitor and track energy performance over the operational life of the building. LEED EAp2 and EAc2 Minimum / Optimize Energy Performance • The Lexington I BDP draft requires new buildings to reduce energy use by at least 30% over an ASHRAE 90.1 baseline (current or better). The building's HVAC system will include VRF's with air- source heat pumps. Energy recovery ventilation and demand-controlled ventilation in applicable areas, such as the garage, will be utilized. The system will be mostly electric. • MEP to conduct an early "Shoe-Box" energy model in order to inform design decisions in SD and work toward savings goals. The Whole Building Energy Model will be conducted in the DD phase and will include project specific inputs. • Energy targets for the project were discussed. Energy Star Target Finder shows an EUI of 67 kbtu/sf/yr (site energy) for an "average" police station in Lexington. Meeting the Architecture 2030 goal of a 70% energy reduction would require an EUI of 20 kbtu/sf/yr. LEED EAp3 and EAc3 Building Level and Advanced Energy Meterinq • The project team intends to follow the LEEDv4 criteria for installing whole building energy meters as well as advanced energy meters in order to track energy performance through a building automation system. LEED EAc5: Renewable Energy Production • The project intends to utilize an onsite renewable energy system to offset operating energy use by 20%. This may be supplemented with offsite renewable energy production. Renewable energy system may be a solar canopy in the parking area. Once early energy model is complete the team will conduct an energy storage analysis to determine storage needs. PBC Meeting 05.02.19 2