The approval of a refrigerator requires making various standardized tests in a climatic chamber, such as energy consumption, freezing capacity, external sweating, temperature retention, classification and others. Such tests are regulated by standards such as ISO 15502, ISO 8187, ISO 7371, ISO 5155, ANSI / AHAM HRF-1-2004, which describe the standards that must be met for the validation of tests. To perform all tests and meet the requirements of all standards referred to above, POLO has 7 properly calibrated environmental chambers, and 6 capable of operating at temperatures between 15 and 45 ° C and relative humidity between 45 and 90%, and 1 capable of reaching temperatures close to -20 ° C.