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A contract between the Escola Politécnica of the Univeridade Estadual de São Paulo and the Mercedes-Benz do Brasil S/A was set to study the heat sources that act on a cab. This article is a bibliographical review on this topic. In the first part is reviewed how the heat sources mathematical models were developped from 1960 to these days. On the second part is commented and discussed some topics on cab ventilation as: air circulation and distribution pattern external air introduction, air dischange nozzles and outlets displacement, comfort discharging air velocity and temperature, etc…