Ambulances and Emergency Medical Vehicles Compliance Tests are used to test the procedures and principles regarding the establishment, operation and inspection of ambulance services and the suitability of ambulances, emergency medical vehicles and patient transport vehicles for vehicle air conditioning. When the ambient temperature is low, the heating performance of the air conditioner or when the ambient temperature is high, the cooling performance of the air conditioner is observed. In the in-vehicle heating test carried out with reference to TS EN 1789:2020 5.10, the temperature values ​​of the thermocouples in the center of the stretcher of the vehicle patient compartment are measured. In the visual, physical and functional checks performed after the test, the performance of the vehicle’s heating system is checked based on the Heating Test in EN 1789:2020 Standard. In the in-vehicle cooling test carried out with reference to TS EN 1789:2020 5.11, the temperature values ​​of the vehicle patient compartment thermocouples are measured. In the visual, physical and functional controls performed after the test, whether there is any problem in the performance control of the vehicle’s cooling system based on the Cooling Test in EN 1789:2020 Standard. is observed.