Tweaking ventilation and temperature control systems, along with a mild winter, helped the experimental net-zero-energy house at the National Institute of Standards and Technology (NIST) quadruple the amount of surplus energy it sent to the power grid during its second year-long demonstration.

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On March 3, 2016:

Thanks to all of you for making this project such a success!

We are currently in the process of making changes for the third year of testing. The major change will be the use of a high velocity heat pump system and associated ductwork. Operation will be alternating on a weekly basis between the conventional heat pump system and the high velocity system.

Hunter Fanney

Senior Research Scientist, Energy and Environment Division

Engineering Laboratory

National Institute of Standards and Technology