This course is an introduction to ANSI/ASHRAE 55-2017 – Thermal Environmental Conditions for Human Occupancy, the building industry’s standard for defining and quantifying relative comfort in the built environment. The Standard is one of many developed and maintained by the American Society of Heating, Refrigerating and Air-Conditioning Engineers, better known as ASHRAE. The intent of this course is to introduce learners to the Standard, its origins, its purpose and its application. This course is intended for engineers of building HVAC systems, architects, building code officials, HVAC equipment manufacturers and building managers and owners.