Energy System Concept Design | 1301 Pennsylvania Avenue NW

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Plans for the reinvention of 1301 Pennsylvania Avenue NW included replacing the existing building with a new, highly efficient, trophy class office building.

GHT provided energy system concept designs for the project, including a dedicated outdoor air system (DOAS) as part of an ultra high efficiency HVAC system. A DOAS can benefit tenants and owners by maximizing building energy efficiency and usable square footage compared to other HVAC systems.

Other sustainable design features that were explored included external sunshades; a green roof; photovoltaic array; rainwater collection; geothermal; and natural ventilation. The team evaluated how the design would react to typical climate data and the results suggested that occupants would be able to utilize operable windows approximately a third of the year during typical occupied hours.

The design team’s initial analysis of sustainable design strategies also found that the new building could be 70% more energy efficient than an average comparable building, the combined result of a predicted:

  • 27% total annual energy use reduction
  • 23% total annual energy cost reduction
  • 45% reduction in HVAC energy consumption and lighting loads
Year Completed
Services Provided
GHT Studio