Engineering Question
What Is Building Automation?
Building automation is the control system that starts, stops, sequences, and monitors HVAC and related equipment so a building operates as designed.
Reviewed by
Michael K. Frempong, PE, LEED AP BD+C
President & Principal Engineer, BEED Engineering
Michael is a professional engineer and LEED AP BD+C accredited professional with more than 20 years of consulting engineering experience. He leads BEED Engineering's mechanical, electrical, and plumbing design work for commercial, healthcare, laboratory, education, industrial, and other building projects throughout Central Florida and the Treasure Coast.
View BEED team profileQuick Answer
Building automation is the control system that operates HVAC and related building equipment automatically. Sensors, controllers, and software start and stop equipment, maintain setpoints, and alarm when systems are outside expected conditions. A well-designed BAS is what turns mechanical equipment into a coordinated building system.
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What a BAS is
A building automation system (BAS), sometimes called a building management system, is the network of sensors, controllers, and operator interfaces that run HVAC and related systems.
It is not the chiller, air handler, or boiler. It is the logic that tells those machines when to run, how fast to run, and when to alarm.
What it typically controls
- Air-handling units and rooftop units
- Chilled water plants
- Exhaust fans and outside-air systems
- Lighting in some projects
- Monitoring of emergency power status
- Alarms for temperature, humidity, and equipment faults
Why sequences of operation matter
The engineer should specify:
- Start/stop order
- Setpoints and resets
- Occupied and unoccupied modes
- Humidity and minimum outdoor-air logic
- Safeties and alarm limits
- Points list for monitoring
Without that, two identical mechanical designs can operate very differently.
Relationship to commissioning
Commissioning tests whether the installed controls actually follow the specified sequences. A BAS that was never commissioned often looks complete and still fails in humidity control or part-load operation.
When to involve an engineer
Involve an engineer when replacing a plant, adding a dedicated outdoor air system, integrating new equipment into an existing front-end, or investigating chronic comfort complaints. Florida humidity control depends on control logic as much as equipment size. See how to control humidity in a commercial building.
Common Questions
Is a thermostat a building automation system?
A thermostat is a simple local control. A BAS coordinates many pieces of equipment, schedules, alarms, and often energy reporting.
Does BEED install the BAS?
BEED designs control sequences and points lists. A controls contractor typically installs and programs the system to those documents.
Filed under Mechanical Engineering
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Related Questions
What Is HVAC Engineering?
HVAC engineering is the design of heating, ventilating, and air-conditioning systems that control temperature, humidity, ventilation, and indoor air quality.
How Does a Chilled Water System Work?
Chilled water absorbs heat at building coils, returns to the chiller, rejects that heat at a cooling tower or air-cooled condenser, and is pumped back out as cold supply water.
How Do You Control Humidity in a Commercial Building?
Commercial humidity control depends on dehumidification at the cooling coil, proper outdoor-air treatment, runtime, and controls—not just a lower thermostat setpoint.
Related BEED Services
Service
Building Automation
Controls sequences, BAS architecture, and integration that make mechanical and electrical systems operate as designed.
Service
HVAC Engineering
Heating, ventilating, and air-conditioning design for occupant comfort, indoor air quality, and energy performance.
Service
Commissioning
Systematic verification that building systems are installed, tested, and operating according to the owner's requirements.
Related Locations
Service Area
Serving Central & South Florida
BEED Engineering is based in Palm Bay and serves building projects throughout Brevard County, the Treasure Coast, Port St. Lucie, Orlando, and surrounding areas.
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