## 1 Introduction  
Industrial Revolution 4.0 is based on Information and Communications Technology (ICT), Internet of Things (IoT), artificial intelligence (AI) linked to Big Data and algorithms used to process them, robotics, and cloud services, among others, to optimize processes and achieve more efficiency and productivity [1, 2, 3]. Within this great Industry 4.0 paradigm, occupational health and safety and the issue of thermal comfort are included. ISO 7730 Standard defines thermal comfort, also known as hygrothermal comfort, as \"that mental condition in which thermal environment satisfaction is expressed\" [4], which is a subjective concept and thus very difficult to assess. It is even defined by its opposite concept--hygrothermal discomfort, which is climate discomfort due to temperature, humidity, or air velocity. From a physiological standpoint, a person experiences thermal comfort when their organism does not need to use their body temperature autoregulation mechanisms [5]. Hygrothermal comfort has major impact on both people's health and environmental sustainability. The application handbook of Law 13059, _Hygrothermal Conditioning of Buildings_ from the Housing Institute of Buenos Aires, describes that adequate levels of thermal comfort are essential for maintaining health, moderating humidity condensation effects, and saving energy [6]. Additionally, the Ministry of Health of Argentina [7] mentions that the World Health Organization defines occupational health as a multidisciplinary activity aimed at promoting and protecting workers' health by disease and accident prevention and at controllingrisk prevention and safety at work. It aims at creating and promoting healthy and safe work as well as comfortable work environments, emphasizing the mental, physical, and social wellbeing of workers and promoting the optimization and maintenance of their work capacity. Taking into consideration the general importance of the subject and the World Health Organization recommendations about occupational health as for hygothermal comfort, the following issues about the air conditioning installation project are considered. In this sense, [PERSON] [8] suggests designing and calculating heating, ventilation, and air conditioning (HVAC) installations in which the following factors should be considered:  
* Building factors: dimensions and sun orientation of the premises, total transmittance coefficients on walls, floors and ceilings, room distribution;
* Purposes of premises: number of people, type of activity and time schedule, lighting, equipment and motor-driven machines, and other heat-emitting sources;
* Design parameters: outdoor temperature and relative humidity determined in the premises, indoor temperature, and relative humidity. In closed spaces, air velocity has no decisive influence since its values for comfort conditions may vary from 5 to 8 m/s, and in summer, velocities up to 12 m/s may be acceptable. Both building factors and the purpose of the premises can be determined with some precision, while design parameters related to indoor temperature and relative humidity for people to be at thermal comfort cannot if we consider the concept's subjective factor. In general, the parameters used when calculating air conditioning installations are obtained from charts and/or tables based on controlled experiences under ideal conditions and for a specific population. In this sense, the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), with the help of different universities and official entities, carried out experiences to see different people's reactions under different temperature, relative humidity, and air movement conditions. The results were used to create a comfort chart linking psychometric conditions to human reactions [9]. When using indoor temperature and relative humidity values to calculate installations, actual working conditions, regional customs, and local weather characteristics are not taken into consideration.