Tube-in-tube heat exchanger with modular design. Vortico VWR-RR exchanger modules can work as separate devices or be combined into larger devices. Thanks to the modular structure, it is possible to optimally select the size of the heat exchanger, enabling the device to be adapted to the available space. Exchangers are individually designed for specific process parameters. At the customer's request, we provide thermal and mechanical calculations of the exchanger as well as drawings and 3D models to be included in the installation project.