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A Building Management System (BMS) is 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. A BMS consists of software and hardware and use highly advanced automated systems like SCADA (Supervisor Control and Data Acquisition) and PLC (Programmable Logic Controller).

BMS is most commonly used for large buildings, as they serve as a critical component to managing energy demand. Systems linked to a BMS typically represent 40% of a building's energy usage; if lighting is included, this number approaches 70%.

The main functions of BMS include controlling, monitoring, and optimizing the building’s facilities, mechanical and electrical equipments for comfort, safety and efficiency.

Primary Function: To control heating and cooling, manage the systems that distribute this air throughout the building (for example by operating fans or opening/closing dampers), and then locally control the mixture of heating and cooling to achieve the desired room temperature.

Secondary Function: To monitor the level of human-generated CO2, mixing in outside air with waste air to increase the amount of oxygen while also minimizing heating/ cooling losses.

A BMS normally comprises:

  • Power systems
  • Illumination system
  • Electric power control system
  • Heating, Ventilation and Air-conditioning HVAC System
  • Security and observation system
  • Magnetic card and access system
  • Fire alarm system
  • Lifts, elevators etc.
  • Plumbing system
  • Burglar alarms
  • Trace Heating
  • Other engineering systems
  • Home Automation System

Benefits of BMS:

  • Increased levels of comfort and thus, more satisfied occupants
  • Possibility of individual room control
  • Increased productivity
  • Effective monitoring and targeting of energy consumption
  • Improved plant reliability and life
  • Effective response to HVAC-related complaints
  • Low operating cost
  • Efficient use of building resources and services
  • Rapid alarm indication and fault diagnosis
  • Good plant schematics and documentation
  • Ease of information availability problem diagnostics
  • Computerized maintenance scheduling

So, the advantages of BMS are:

  • economy of maintenance and running costs (heating, lighting, electricity, easy way to detect the damage and eliminate it, etc.)
  • increased level of comfort and time saving
  • the value of the building increases
  • safety and control levels are increased

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