<P> HVAC professionals in the US can receive training through formal training institutions, where most earn associate degrees . Training for HVAC technicians includes classroom lectures and hands - on tasks, and can be followed by an apprenticeship wherein the recent graduate works alongside a professional HVAC technician for a temporary period . HVAC techs who have been trained can also be certified in areas such as air conditioning, heat pumps, gas heating, and commercial refrigeration . </P> <P> The Chartered Institution of Building Services Engineers is a body that covers the essential Service (systems architecture) that allow buildings to operate . It includes the electrotechnical, heating, ventilating, air conditioning, refrigeration and plumbing industries . To train as a building services engineer, the academic requirements are GCSEs (A-C) / Standard Grades (1 - 3) in Maths and Science, which are important in measurements, planning and theory . Employers will often want a degree in a branch of engineering, such as building environment engineering, electrical engineering or mechanical engineering . To become a full member of CIBSE, and so also to be registered by the Engineering Council UK as a chartered engineer, engineers must also attain an Honours Degree and a master's degree in a relevant engineering subject . </P> <P> CIBSE publishes several guides to HVAC design relevant to the UK market, and also the Republic of Ireland, Australia, New Zealand and Hong Kong . These guides include various recommended design criteria and standards, some of which are cited within the UK building regulations, and therefore form a legislative requirement for major building services works . The main guides are: </P> <Ul> <Li> Guide A: Environmental Design </Li> <Li> Guide B: Heating, Ventilating, Air Conditioning and Refrigeration </Li> <Li> Guide C: Reference Data </Li> <Li> Guide D: Transportation systems in Buildings </Li> <Li> Guide E: Fire Safety Engineering </Li> <Li> Guide F: Energy Efficiency in Buildings </Li> <Li> Guide G: Public Health Engineering </Li> <Li> Guide H: Building Control Systems </Li> <Li> Guide J: Weather, Solar and Illuminance Data </Li> <Li> Guide K: Electricity in Buildings </Li> <Li> Guide L: Sustainability </Li> <Li> Guide M: Maintenance Engineering and Management </Li> </Ul>

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