National Renewable Energy Laboratory Study
The National Renewable Energy Laboratory (NREL) worked with the Bonneville Power
Administration (BPA) Technology Innovation Office to demonstrate a turnkey, retrofit
technology that combines demand response (DR) and energy efficiency (EE) benefits for
heating, ventilating, and air conditioning (HVAC) as well as lighting in retail buildings. As a
secondary benefit, the team controlled various plug loads and electric water heaters (EWHs).
The technology demonstrated was Transformative Wave’s eIQ building management system
(BMS), which automatically responds to DR signals. The BMS controlled the HVAC rooftop
units (RTUs) using the CATALYST retrofit solution from Transformative Wave. The nonHVAC
loads were controlled using hardwired and ZigBee wireless communication. The wireless
controllers, manufactured by Autani, were used when the electrical layout was too disorganized
to leverage the less-expensive hardwired control.