Berkeley Research Group’s space at the repositioned 1800 M Street NW features a combination of VAV terminal units and chilled beams. GHT provided mechanical, electrical, and plumbing (MEP) engineering design services for the fit-out, which includes private offices along the perimeter, interior workstations, conference rooms, and support areas.
VAV terminal units provide cooling for interior zones and are fed from the penthouse air handling units. The perimeter is served by concealed chilled beams with electric heat. The chilled beams receive chilled water and primary air via perimeter risers. A chilled water control valve modulates the flow of the chilled beams in response to the room temperature sensor. Two dedicated LAN air conditioning units, connected to the existing condenser water loop at the building core, provide cooling to accommodate the heat output of the LAN room’s equipment racks.
The project achieved a certification level of Gold under the LEED for Commercial Interiors™ rating system. Lighting was designed to exceed ASHRAE/IESNA efficiency standards by 20% or greater. Reduced lighting loads are achieved through the use of occupancy sensors, photocells/dimming ballasts, proper zoning, energy efficient mechanical equipment, and control sequences – all of which contribute to overall energy efficiency.