What Is The Difference Between Bms And Bas?


The Difference Between Energy Management Systems (EMS) & Building Management Systems (BMS)


Citizens around the globe are looking for the most efficient effective efficient ways to operate their commercial effective real estate properties. Terms such as Energy Management Systems (EMS) Building Management Systems (BMS), and Building Automation Systems (BAS) are some words that could be brought up in the path to efficiency. These terms are often used interchangeably and as a result, people don’t realize that while construction automation and building management might be synonymous, energy management is very different.


Energy Management System

Energy management systems (EMS) are computer-based systems that measure your energy consumption and look for spaces where your energy efficiency could be improved.


Among other items, energy management systems can be used to track device-level equipment such as HVAC units and lighting systems centrally across various locations, such as supermarkets, grocery, and restaurant sites. EMS offers an overall image of your energy usage, an issue occurs with the ability to zoom in to data at the system level.


Energy management systems may also have the ability to calculate, send and track functions that allow managers of facilities and buildings to obtain data and information that enables them to make more informed decisions about energy activities across their sites. Energy management systems will reduce the energy usage of a 21-story building by 50 percent on average.


Building Management System/Building Automation System

Building management systems (BMS), synonymous with the Building Automation System (BAS), are computer-based systems that are used in the building to automate functions.


This system is intended to automate controls such as ventilation, protection, lighting, and power. This is useful for emergency procedures as it allows for improved reaction to incidents such as fire alarms, security breaches, air conditioning issues, and much more. An example of an automatic fire safety system may be to make the elevators turned off safely at the ground floor, so that no one can access them in the event of a building fire. It can also be programmed for versatility and power, depending on a room to room. Approximately 40 percent of the total energy of buildings is usually controlled by a BMS, so if the BMS is configured incorrectly, it can account for 20 percent of the total energy consumption of buildings.


Can Energy Management Systems Work with Building Management Systems?


Yes, EMS and BMS have a marvelously collaborative past. The reason why it is so important to understand the difference between energy management systems and building management systems is that they both serve the same purpose, but they complement each other.


While energy management systems concentrate on details at the micro-level, construction management systems focus on knowledge at the macro-level. This puts them in perfect complementary positions. However, it is important to remember that EMS and BMS speak two entirely different languages, and as such, a middleman is required to translate between the two. A BACnet is the most commonly-used converter.

Energy Management Systems: Micro


The sensors deployed by an EMS collect and analyze every single piece of telemetry data at the device level, which is why the EMS functions at a micro-level. This research at the micro-level is what makes an EMS such a powerful method for making decisions. It provides insights into energy consumption and overall building efficiency, because it understands how each piece of equipment / HVAC unit works individually and can then compile the data together to give the facility or property manager a comprehensive picture analysis of what is actually happening.


The manager can assess the overall energy consumption with the information being tracked, and can also recognize particular units that are underperforming, as well as specific measures to maximize and regulate their usage of energy. The data and observations provided by the EMS will then be used to customize the BMS in a way that addresses different areas, making it even more useful.

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