Air and liquid flows in the HVAC industry are a key element illustrating the operation of devices. Proper presentation of this process can increase awareness among buyers. We propose 3D animations showing the movement of air or liquids, illustrations of heat exchange processes, or demonstrations of the advantages and construction of products. In this field, we have a lot of experience, and we have created graphic materials to support promotional and marketing activities for many campanies. From simple renders of individual air curtains to animations of heat exchangers like AIC and instructional videos explaining the operation of entire ventilation systems like Flowair or Smay systems.