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This case study details the design and operations of the National Renewable Energy Laboratory (NREL) Research Support Facility data center and its contributions to energy efficiency.

This presentation highlights the importance of modeling the off-design performance of equipment in data centers as a consequence of their dynamic behavior and describes an experimentally validated tool for modeling the energy use of the data center and cooling infrastructure.

The rooftop unit (RTU) decision tree can be used for preliminary screening for replacement of RTU units with more efficient units. This decision tree organizes RTUs into bins for “retrofit,” “replacement,” “no action,” or “needs further analysis.”

Older, inefficient commercial rooftop unit (RTU) air conditioning systems are common and can waste from $1,000 to $3,700 per unit annually, depending on the building size and type. By replacing or retrofitting them, you can save money, improve your energy efficiency, make your building more comfortable, and help the environment. The Advanced RTU Campaign (ARC) encourages commercial building owners and operators to replace their old RTUs with more efficient units or to retrofit their RTUs with advanced controls in order to take advantage of these benefits. This website shows updates to the campaign including resources and progress towards the campaign's goal.

Owner Commitment: Project Manager Perspective presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012

Design Team Commitment: An Architect's Perspective presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012

Integrated Design presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012

Presentation slides from Owner Commitment: Project Manager Perspective presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012.

Presentation slides from Design Team Commitment: Contractor Perspective on an Integrated Design Process presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012.

Presentation slides from Design Team Commitment: Contractor Perspective on Cost Control presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012.