A Demand Response system that responds directly to signals from the utility without the need for manual intervention.
(Afthr) After Hours
(AHU) Air Handler Unit
(BAS) Building Automation System
A distributed system that automatically controls a wide variety of systems in large buildings, often including lighting, air handlers and chilled water systems.
(BMS) Building Management System
A computer-based control system installed in buildings that controls and monitors the building's mechanical and electrical equipment, such as ventilation, lighting, power systems, fire systems, and security systems.
(CA) Common Area
(Cdw) Condensed Water
(Cdwp) Chilled Water Pump
(Chw) Chilled Water
(CSP) Curtailment Service Provider
A company that serves as an intermediary between utilities and customers, pooling together groups of customers who participate in demand response programs to reduce energy usage during periods of peak demand. More commonly known as Demand Response Aggregators.
(Ctf) Cooling Tower Fan
(Cv) Cooling Valve
(DDC) Direct Digital Control
(DL) Demand Limit
(Dp) Differential Pressure
(DR) Demand Response
The process of voluntary end-user reduction in energy consumption during periods of peak energy demand.
(DRA) Demand Response Aggregator
A company that serves as an intermediary between utilities and customers, pooling together groups of customers who participate in demand response programs to reduce energy usage during periods of peak demand. Also known as Curtailment Service Providers.
(DRAS) Demand Response Automation Server
(DX) Direct Expansion
(EE) Energy Efficiency
Reducing the overall amount of energy required to provide a service, such as cooling, heating or lighting.
(EMS) Energy Management System
A system of computer-aided tools used by operators of electric utility grids to monitor, control, and optimize the performance of the generation and/or transmission system.
(ESCO) Energy Service Company
A commercial business providing a broad range of comprehensive energy solutions, including designs and implementation of energy savings projects, energy conservation, energy infrastructure outsourcing, power generation and energy supply, and risk management.
(FDD) Fault Detection & Diagnostics
The process of identifying and finding the root cause of errors in a system.
(HVAC) Heating, Ventilation, Air Conditioning
Shorthand term for building comfort systems, often used to refer to Air Conditioning systems even though the acronym includes Heating and Ventilation as well.
(IOU) Investor Owned Utility
A utility provider that is investor-owned, rather than being a government-owned or utility cooperative.
(OSADB) Outside Air Dry Bulb
(Rat) Return Air Temperature
Energy efficiency industry jargon for the process of performing energy-efficient retrofits on existing buildings.