The ‘HEXeco’ collaborative project seeks to revolutionize heat exchanger technology by leveraging Friction Stir Welding as a central element in a groundbreaking manufacturing strategy. The proposal introduces an innovative concept of a friction stir-welded liquid heat exchanger integrated with vacuum insulation, effectively eliminating convection and radiation heat losses to external surfaces. The primary goal is to develop an exceptionally efficient heat exchanger, with a specific focus on transforming air source heat pumps and radiators, critical components in indoor climate control systems. The project specifically targets air source heat pumps, aiming to eliminate the necessity for fans on evaporators or significantly reduce their power consumption. Simultaneously, the initiative strives to redefine radiators, making them more compact, lightweight, and visually appealing compared to traditional steel-based counterparts. Importantly, these enhancements will not compromise heat transfer capacity, ensuring effective and efficient temperature control within indoor spaces. To achieve these ambitious objectives, the project will pioneer a sustainable manufacturing method for aluminium heat exchangers incorporating vacuum-insulated panels. Friction Stir Welding plays a pivotal role in showcasing the viability and cost-effectiveness of manufacturing such components, ushering in a new era of efficiency and functionality. In addition to technological advancements, the project places a strong emphasis on sustainability. By optimizing the energy efficiency of the manufacturing process and minimizing resource consumption, the initiative aims to elevate the overall sustainability of heat exchanger production. Furthermore, a commitment to reducing the environmental footprint extends throughout the entire lifecycle of the heat exchangers, leveraging lighter final products to lower transportation costs and enhance overall manufacturing efficiency. The innovative ‘HEXeco’ products resulting from this collaborative effort will initially be showcased in commercial and domestic heating applications. However, its versatility extends to a broader spectrum of uses, including hydrogen storage, cooling of power electronics, and thermal management of electric vehicle batteries—applications of significant relevance in the European market. Overall, this collaborative project envisions a paradigm shift in heat exchanger technology, driven by the inventive application of Friction Stir Welding. Through the enhancement of efficiency, reduction of energy consumption, and embrace of sustainable manufacturing practices, the initiative not only aims to meet the demands of modern climate control systems but also makes a substantial contribution to a more sustainable and environmentally conscious future.