This dissertation aims to metrologically evaluate the results of performance and consumption tests on domestic gas cooking appliances and their influence on the classification of the Brazilian Labelling Program for these appliances. The compliance assessment and how the different altitudes influence the tests accompanied by their measurement uncertainties come from historical data from the beginning of the Brazilian Labelling Program on stoves and from the constant questions about the representativeness of the results of the interlaboratorial tests, which motivated the realization of the study. The methodology used was based on bibliographic, documentary and experimental research, which aimed to collect data from income and consumption tests in two cities with different altitudes, discussion of the standard with details of the algorithms and statistical treatment of the collected data. The approach proposal is based on the evaluation of normality, treatment of outliers, calculation of the reported yield from the position measurement inversely weighted by the measure of dispersion of each burner and development of the uncertainty calculation algorithms of the performance and consumption tests. In this scenario, the results show that the arithmetic mean, currently used in the calculation of the performance of the four burners on the stove table, can be replaced by the weighted average by variances that are not statistically compatible with each other. It is concluded that the uncertainty of the efficiency and consumption tests was not enough to put at risk the change in the classification range of the energy efficiency label of the product. However, there is a difference between the results at sea level and at altitude above sea level, which suggests more detailed future studies on the altitude correction algorithms.