The Green Proving Ground program has commissioned Department of Energy National Laboratories to perform real-world measurement and verification of the following technologies in pilot installations in federally-owned buildings. Preliminary technology assessments are available below as PDFs.

Preliminary Technology Assessments

In the News: From the 2016 Program Lineup

High Performance Circulator Pump  [PDF - 217 KB] This technology saves pump energy by incrementally adjusting a pump’s flow speed to a building’s changing demands. It also generates useful data by tracking temperature, flow rate, and energy use. Findings available in 2018.

Hydronic Heating Standby Optimization  [PDF - 216 KB] This technology distinguishes natural heat loss from system demand to effectively reduce the number of times a boiler fires each day, thus conserving energy without compromising occupant comfort. Findings available in 2018.


High Efficiency HVAC [PDF - 216 KB] High efficiency heating, ventilating, and air conditioning (HVAC) units are a new class of rooftop unit (RTU) that can reduce building energy needs by half without reducing HVAC effectiveness. Blowing conditioned air through central shafts and ceiling spaces, the new technology incorporates variable speed controls on the refrigerant compressor, valves, and fans to efficiently heat or cool designated spaces as desired. The high efficiency HVAC RTUs capture and reuse heat, cold, and humidity from a building’s exhaust air and utilize waste heat from the compressors to reheat air that has been purposely over-cooled. Greater Southwest Regional Project. Findings available in 2017.

Intelligent Energy Valves for Hydronic Systems [PDF - 212 KB] This technology reduces the power consumed by pumps in hydronic heating and cooling systems by maintaining an optimal temperature difference (Delta-T) between fluid supply and return lines. Findings available in 2017.

Smart Scrubbers for HVAC Load Reduction [PDF - 213 KB] This technology reduces the volume of outside air required to maintain indoor air quality (IAQ) by using absorbent materials to selectively remove contaminants from HVAC airflow. Findings available in 2017.

Variable Speed Screw Chiller [PDF - 212 KB] This chiller promises year-round savings by modulating capacity while maintaining performance. Findings available in 2016.

The Green Proving Ground program leverages GSA’s real estate portfolio to test innovative building technologies and provide recommendations on their deployment.


Last Reviewed 2016-09-22