The MassDOT District 4 Administrative building is a 45,000 sf office building, including a 2,000 sf laboratory for testing asphalt, located in Arlington. The Architect for the project is Austin Architects and the Mechanical Engineer is Building Engineering Resources. BEC is both the Certified Passive House Consultant (CPHCs) and Quality Assurance Commissioning (QACx) agent for the mechanical systems.

The project received Phius 2021 ZERO COMM design certification in July 2024. The Variable Refrigerant Flow (VRF) system with heat recovery will provide space conditioning while the rooftop Energy Recovery Ventilator (ERV) system connected to high-efficiency heat pumps will deliver continuous pre-conditioned fresh air throughout the building. The lab has its own Dedicated Outdoor Air System (DOAS) and exhaust fan with a glycol runaround loop for sensible heat recovery when the ovens are operating to eliminate the possibility of cross-contamination with the hazardous exhaust. Photovoltaics (PV) panels will be on the rooftop and on sun shades attached above the glazing in addition to the solar canopies over the parking lot, resulting in a projected site EUI of -4 kBtu/ft2/yr in WUFI Passive