Building services engineering

Building services engineering (BSE) is a professional engineering discipline that strives to achieve a safe and comfortable indoor environment while minimizing the environmental impact of a building.

Professional bodies
The two most notable professional bodies are:
 * The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) was founded in 1894.
 * The British Chartered Institution of Building Services Engineers (CIBSE) was founded in 1976 and received a Royal Charter in the United Kingdom, formally recognising building services engineering as a profession.

Education
Building services engineers typically possess an academic degree in civil engineering, architectural engineering, building services engineering, mechanical engineering or electrical engineering. The length of study for such a degree is usually 3–4 years for a Bachelor of Engineering (BEng) or Bachelor of Science (BSc) and 4–5 years for a Master of Engineering (MEng).

In the United Kingdom, the Chartered Institution of Building Services Engineers (CIBSE) accredits university degrees in Building Services Engineering. In the United States, ABET accredits degrees.

Building services engineering software
Many tasks in building services engineering involve the use of engineering software, for example to design/model or draw solutions. The most common types of tool are whole building energy simulation and CAD (traditionally 2D) or the increasingly popular Building Information Modeling (BIM) which is 3D. 3D BIM software can have integrated tools for Building Services calculations such sizing ventilation ducts or estimating noise levels. Another use of 3D/4D BIM is that empowers more informed decision making and better coordination between different disciplines, such as 'collision testing'.