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W W W. M A I N E B I Z . B I Z 29 A P R I L 1 6 , 2 0 1 8 F O C U S R E A L E S TAT E / C O N S T R U C T I O N / D E S I G N While Passive House is often con- fused with LEED, there's a diff erence. LEED, or Leadership in Environmental and Energy Design, is about overall environmental impact. Passive House is about energy effi ciency. " is isn't LEED, this isn't Energy Star," Corson says. "It's about high- performance building envelopes that are designed to meet the international Passive House standards." Focus on energy use At Waynfl ete School, a 33,000-square- foot addition is expected to be ready in September. "At the beginning of the design process, we looked at LEED versus Passive House," says Cordelia Pitman, director of preconstruction services for Contact Nick Sabatine Contact Nick Sabatine at the idea-stage: at the idea-stage: nsabatine@ransomenv.com 207-772-2891 D E V E L O P M E N T D E V E L O P M E N T \ \ D U E D I L I G E N C E D U E D I L I G E N C E \ \ E N V I R O N M E N TA L H E A LT H & S A F E T Y E N V I R O N M E N TA L H E A LT H & S A F E T Y E N V I R O N M E N TA L H E A LT H & S A F E T Y \ \ M U N I C I P A L \ \ U T I L I T Y, E N E R G Y & M A N U F A C T U R I N G Site Planning Site Planning Wastewater Engineering Wastewater Engineering Storm Water Engineering Storm Water Engineering Permitting Permitting Water Supply Engineering Water Supply Engineering GIS Applications GIS Applications Turnkey Brownfield Services Turnkey Brownfield Services Turnkey Brownfield Services Remediation Remediation Funding Assistance Funding Assistance Consulting Engineers and Scientists www.RansomEnv.com BRICKHILL, SOUTH PORTLAND Designing The Future TODAY Lee Speronis knows what it takes to create enjoyable travel experiences. The convenience of updated passenger amenities and warm, friendly service at Bangor International Airport combine to make flying simple and enjoyable. Lee says it deserves a grade of A+, and after all, he's the professor. Learn more at FlyBangor.com. Lee P. Speronis, JD, BS, CHE, CHIA Director and Associate Professor School of Hospitality, Sport and Tourism Management Husson University, College of Business "The experience is completely modern and up to date." ALLEGIANT • AMERICAN • DELTA • UNITED Non-stop flights to major hub cities with connections to the world. BGR_MaineBiz_Testimonials.indd 1 3/30/18 12:30 PM C O N T I N U E D O N F O L L OW I N G PA G E » Passive House principles C ertifi ed Passive House structures (the term Passive House applies to commercial buildings as well), have strict space heating and cooling lim- its, as well as airfl ow and tempera- ture limits. (see passivehouse.org for details). To achieve the requirements, all certifi ed Passive House structures must include: Thermal insulation: All opaque building components of the exterior envelope of the house must be well-insulated. Passive House windows: The window frames must be well-insulated and fi t- ted with glass fi lled with argon or kryp- ton to prevent heat transfer. Ventilation heat recovery: Effi cient heat recovery ventilation is key, allow- ing for a good indoor air quality and saving energy. In Passive House, at least 75% of the heat from the exhaust air is transferred to the fresh air again by means of a heat exchanger. Airtight building: Uncontrolled leakage through gaps must be smaller than 0.6 of the total house volume per hour during a pressure test at 50 Pascal (both pressurised and unpressurised). Absence of thermal bridges: All edges, corners, connections and penetrations must be planned and executed with great care, so that thermal bridges can be avoided. Thermal bridges which cannot be avoided must be minimised as far as possible. S O U R C E : Passive House Institute, www.passivehouse.com

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