- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 01 Oct 2021
Building Automation and Control System BACS
The term 'Building Automation and Control System' (BACS) refers to centralised systems that monitor, control, and record the functions of building services systems. Building facilities that are monitored and controlled by a reliable BACS tend to maintain the building environment more efficiently and so reduce the building's environmental impact and energy costs.
- Maintain control of the building's environment.
- Operate systems according to occupancy and energy demand.
- Monitor and correct the performance of systems.
- Sound alerts as required.
- Mechanical systems.
- Electrical systems.
- Heating, ventilation and air-conditioning (HVAC).
- Lighting control.
- Security and surveillance.
There is growing overlap between the concepts of BACS and the need to learn from the accumulated data to operate buildings more efficiently. Increasingly this includes technologies such as the internet of things to become smart buildings.
The basic components of a BACS are:
- Sensors: Measure values such as temperature, humidity, lighting levels, room occupancy, and so on.
- Controllers: Instigate the system's response from the collected data, using algorithms that apply logic and send commands.
- Output devices: Carry out commands from the controller.
- Communications protocol: The 'language' used by the BACS components.
- Dashboard: The user interface for data reporting and interaction with the BACS system.
There are a number of similar terms that can be used to refer to building automation, such as Building Management System (BMS), Building Control System (BCS) and Building Automation System (BAS). However, BACS is the standard term as defined by EN ISO 16484-2:2004 Building automation and control systems (BACS) -- Part 2: Hardware, 3.31.
The phrase Building Energy Management Systems (BEMS) is sometimes used interchangeably with BACS, however, BEMS deal specifically with energy consumption, metering, and so on. It is generally considered though that there is sufficient overlap between the two that they can be used interchangeably.
 Related articles on Designing Buildings Wiki
- Air conditioning.
- Artificial intelligence.
- Artificial intelligence in buildings.
- BACS building automation controls - the information revolution.
- BSRIA study shows uptake of convergence and IoT in commercial buildings.
- BSRIA study: The market for European Field Devices.
- Building energy efficiency - is building automation the answer?
- Building energy management systems BEMS.
- Building management systems.
- Building services.
- Commercial building automation market.
- Cyber threats to building automation and control systems.
- Edge devices.
- European BACS Market 2019 - 2024.
- Energy management and building controls.
- Global BACS market resilience.
- Global building energy management systems market.
- Internet of things.
- Internet of things in commercial buildings.
- Mechanical, electrical and plumbing MEP.
- Parking reservation systems.
- Plant room.
- Smart buildings.
- US Smart Connected HVAC in Commercial Buildings Study 2017.
- Wireless vs wired building energy management system.
Featured articles and news
Institute applauds funding initiatives but presses for additional retrofit and tax measures.
The switch from analogue to digital has begun.
The fourth industrial revolution is well underway.
Free online resource will offer guidance on conserving places and the planet during COP26.
Government allocates additional money for building new homes on derelict land.
Smart built environments can be designed around the requirements of real people.
Consistency is at the core of realistic strategies.
Entries being accepted until 20 November 2021.
Fuller’s legacy in the field of resource management.