Purpose -The purpose of this paper is to describe and categorize calculation methods for conducting a complete air conditioning study. More specifically, this paper is a general review of cooling loads calculation methods, psychrometric calculations for installing a central air conditioning unit, ways of fan coil units connection and air duct calculation methods. Design/methodology/approach -This paper was based on two pillars: a dissertation for an industrial facility and technical information found after methodical research. Findings -After a brief reference of the calculation methods and the air conditioning systems installed in this industrial facility, this paper concludes with the most appropriate calculation methods for this industrial facility. Research limitations/implications -This study describes some calculation methods. Thus, future research could be addressed toward the analysis of more methods. Practical implications -This paper includes implications for choosing the most appropriate calculation method according to the air conditioning system installed. Originality/value -The originality of this paper lies in the fact that, except for the theoretical part, there are some examples taken from a case study, thus it can be used as a future guide for selecting methods and systems of industrial air conditioning.