Engineering360: "Air conditioning 101: Basics, working principle and sizing calculations"

There are several errors here in this article....

..."The operation of the AC relies on the ability of a refrigerant to absorb heat once converted from a gaseous state to a liquid state."...

...no, the refrigerant absorbs heat in the gaseous state and discharges the heat from the refrigerant after compressing the gas into a now hot gas, then cools it into a warm liquid via condensation....

The proper sizing of an air conditioning system is done by calculating the heat load of the structure and operating design temperatures...while there are various rules of thumb that are used, like the 5 or 600 square ft per ton mentioned, this actually can vary significantly...also the design of the structure must be taken into account not only for sizing of the unit but also the installation....fitting necessary equipment into available spaces can be challenging, and may involve compromises or alterations to the existing structure....