Targeting 100! – New Prototype High Performance Hospitals – Seattle, Los Angeles, Phoenix, Chicago, Houston, and New York


Prototype Integrated High Performance Design / Energy Modeling


Mike Hatten and SOLARC were key team members in a 2-year effort led by the University of Washington Integrated Design Lab (UWIDL) to develop multiple prototype designs for the high performance hospital of the future.  The name of the project refers to the overall energy use goal of the prototypes to achieve an Energy Use Intensity of 100 kBtu/SF-year or less.SOLARC performed all of the modeling and mechanical system design for the two prototype hospitals in six locations throughout the United States.  Energy modeling was used extensively to identify and evaluate load reduction strategies.  All advanced mechanical system options carefully addressed de-humidification issues related to maintaining required humidity levels, especially in humid climates.


The project included two rounds of on-site meetings with peer review stakeholder groups representing all six locations identified for the project.  Hatten participated in all twelve stakeholder sessions working closely with team colleagues at the UWIDL. Complete results of the project can be viewed and downloaded at:


Project Summary


Hospital size:  550,000 sq.ft.

Annual energy savings, percent: 57% to 64%, compared to typical U.S. hospitals.

Annual energy cost savings: $463,000 to $546,000.

Cost Adder for Efficiency Features: $10/SF to $14/SF.


Integrated Design Measures


• High performance glazing

• Orientation-specific exterior shading – either fixed or dynamic depending upon exposure.

• Daylighting

• Ultra-efficient electric lighting

• De-coupled building HVAC systems using displacement ventilation and radiant heating and cooling, including integration of:

• Advanced dual heat exchanger de-humidification heat recovery

• Advanced  variable  air  volume  systems  for  operating  rooms,  laboratories,  and  other  areas with high required air circulation rates.

     - Multiple high performance central energy plant options

     - Distributed dedicated heat generation

     - Heat recovery chillers

     - Ground-coupled heat pumping