ASHRAE Standard 55

ASHRAE Standard 55

ASHRAE Standard 55


“What exactly specifies what is the proper working conditions for buildings?”


Proper working conditions are vital to the operation of the modern world. And one of these conditions includes thermal comfort, which consists of temperature, thermal radiation, humidity, and airspeed. And because buildings are constructed in all sorts of operating environments, we must need some form of standard that stipulates what are the proper indoor conditions. Well, after much debate, the good engineers of the American Society of Heating, Refrigerating and Air-Conditioning Engineers have developed a protocol known as ASHRAE Standard 55, which takes in the operative temperature, wet bulb temperature, humidity ratio, and relative humidity to create a thermal comfort zone. You can see a demonstration of this in action at, provided by the Center for the Built Environment at the University of California, Berkeley

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