Reducing the global carbon footprint is a critical challenge today. HVAC systems are well-known for their substantial energy consumption, and their inefficient construction further extends this issue. A significant reduction in carbon footprint can be achieved through the effective design of HVAC systems, minimizing errors caused by human communication and imprecise data, which are also often difficult to obtain using traditional design approaches. The most suitable design and precise integration of those systems into the overall building design may be achieved by implementing Building Information Modeling (BIM), minimizing the need for post-construction modifications. The data generated during the design must be computer-readable and easily accessible for effective use. The use of BIM can provide accurate and accessible data from the early design phase throughout the whole building lifecycle. Its capabilities can be extended even further by the implementation of programming. Tools developed by visual or traditional textual programming languages may provide solutions for specific tasks or solve repetitive and time-consuming work. Such tools may provide valuable time for engineers to improve their designs. Additionally, with the rapid development of artificial intelligence, new opportunities for enhancing design workflow have arisen. Although BIM offers various advantages for building design, including HVAC systems, its adoption in Slovakia is still slow, and traditional design methods remain common. Facing barriers to adoption can accelerate its implementation and significantly contribute to creating energy-efficient and environmentally sustainable buildings.