1707 L Street NW

Date 2013
Location Washington, DC
Client The Tower Companies
Category Office Building
Gross Sq.Ft. 110,000

Part of the Tower Companies’ Energy Management initiative was engaging HVAC Concepts, Inc., to provide a detailed alarm service for their building systems. HVACC established procedures to remotely monitor certain systems settings, such as chilled water temperature, and to send messages to the building engineer if system conditions were outside defined parameters. HVACC would follow up by phone or text messages with the engineer to assure that red flags were addressed. While certain aspects of the monitoring service were automated, HVACC personnel had an escalation routine to engage Tower supervisors in specific instances. HVACC also enabled Tower to quickly implement adjustments to BMS control routines or settings as needed to implement AtSite’s recommendations. It is important to emphasize the services provided by the companies involved in this project (or comparable services) are offered today by many firms in the market to building owners and tenants. Property owners or management firms may also perform this type of energy management function without the use of outside firms. This report is focused on assessing the type of service provided, not the service of the individual firms involved in this case study. Tower’s initiative focused on operational settings for building systems and identifying and correcting faults. We refer to this as real-time energy management. In every case, Tower was free to accept or decline AtSite’s and HVAC Concepts recommendations.

Our Solutions

HVAC Concepts implemented highly detailed alarms tied to building systems and our monitoring service. We would send e-mail or phone messages to the building engineers when system conditions were outside defined parameters, such as the temperature of chilled water rising above or dropping below set points. HVACC would follow up by phone or text messages with the engineers—or a supervisor, in certain instances—to ensure that red flags were addressed. Tower’s building professionals met monthly with HVACC to review recommendations, track progress, and identify challenges. HVACC’s monitoring services gave the building engineers additional tools and gave Tower supervisors additional confidence that exceptions would be identified.

We also installed additional metering devices at the building’s main utility meter that would measure and transmit electricity usage data to us. Electrical submeters were installed on the building’s chillers. We note that Tower also had installed meters on natural gas service, but in their case study they examined only the electricity usage and savings. HVAC Concepts installed devices to enable greater access to and control of certain BMS functions.

Project Details: 1707 L Street NW

  • Tower Fans Call On/Status Off and Call Off/Status Off Alarm 
  • Condenser and Chilled Water Pump Call On/Status Off and Call Off /Status Off Alarm 
  • Tower Out, Chiller 1 Supply, Chiller 2 Supply and Hot Water Supply Temperature High/Lo Alarm
  • Boiler 1 and 2 Flame Alarm
  • Induction Unit Supply and Return Fan Call On/Status Off and Call Off/Status Off Alarm
  • Induction Unit Supply Static Pressure High/Lo Alarm 
  • Floors 2-10 AHU Supply Fan Call On/Status Off and Call Off/Status Off Alarm
  • Floors 2-10 Return Air Temperatures High/Lo Alarm

 

View the NRDC Case Study