TICA's combined VRF systems consist of two modules. They can have completely different performance (for example, 28 and 22 hp) and at the same time be fully compatible. One hundred percent compatibility is achieved through the use of identical components and standardized communications. An additional pipeline designed to equalize the oil level between the modules is not required. The intelligent system itself determines the amount of oil required for the optimal functioning of each unit that is part of the combined unit. This approach minimizes the likelihood of oil leakage, simplifies installation and maintenance of equipment. Thanks to the precisely selected configuration, the VRF system based on a combined external unit provides powerful cooling (heating), the efficiency of which does not decrease even at extreme ambient temperatures. The system continues to work with the power declared by the manufacturer and at -25 °C, and at +54 °C.