The Solutions

Lubber Run leverages several strategies to reduce energy consumption and electrical demand. These strategies include a geothermal wellfield with distributed heat pumps, a dedicated outside air system (DOAS) with energy recovery and demand control ventilation, high-performance LED lighting, IT load reductions, and an improved thermal envelope. The building was designed to achieve an EUI of 23 or less and has a 350kW roof-mounted photovoltaic array through a Power Purchase Agreement (PPA).

To make sustainability greatness a reality for Lubber Run, CMTA studied all building envelope features, including walls, windows, and systems. The project included a whole-building blower door pressure test to validate construction tightness, as well as thermal scanning and imaging. The goal was to have a well-insulated building that exceeds code minimum requirements and is also air- and water-tight. Software such as eQuest was utilized to optimize the building envelope. Enhanced roof insulation thickness and wall insulation systems were utilized, as well. Glazing sections were optimized to balance energy consumption with daylighting, and overhang structures enhance shading.

Not only is the building incredibly energy efficient, but the net zero energy design also reduces the facility’s carbon footprint for the life of the building. Compared to an ASHRAE baseline building, Lubber Run eliminates 223 Metric Tons of CO2 emissions each year—and that’s without considering renewable energy. Additional environmental benefits include the elimination of combustibles and the use of battery storage instead of a gas generator. Stormwater retention was also improved on-site with bioretention basins, which lessened the burden of a storm on the community’s overall infrastructure.