The ventilation and air conditioning systems are designed to measure the function required in the different environments of a building or installation. The way in which they are designed allows to have in different areas of a structure the correct air flow necessary to meet the conditions of temperature, humidity and pressure. These systems help in all environments there is a comfort for people and allow to adjust the conditions individually in each area of ​​the structure if desired. There are critical cases such as hospitals where even these systems are designed to generate positive or negative pressures in such a way that, in addition to complying with comfort conditions, safety conditions are met, preventing contaminated air from entering or leaving one environment to another. For the correct functioning of these systems, their performance should be periodically checked by measuring different parameters such as temperature, humidity, flow, pressure, speed among others in different parts of the system. In this way it can be determined that the ventilation and air conditioning system is working under the design parameters or if it is necessary to make some adjustment to be able to comply with its initial design. Most guides for this type of measurement are developed by the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) or by the American National Standards Institute (ANSI). speed among others in different parts of the system. In this way it can be determined that the ventilation and air conditioning system is working under the design parameters or if it is necessary to make some adjustment to be able to comply with its initial design. Most guides for this type of measurement are developed by the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) or by the American National Standards Institute (ANSI). speed among others in different parts of the system. In this way it can be determined that the ventilation and air conditioning system is working under the design parameters or if it is necessary to make some adjustment to be able to comply with its initial design. Most guides for this type of measurement are developed by the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) or by the American National Standards Institute (ANSI).