42 Providing temporary use of web-based software; providing temporary use of web-based applications; providing temporary use of online non-downloadable software; providing temporary use of web-based software for regulating, controlling and optimizing heat pumps and energy distribution networks, and equipment for heating, cooling, ventilation and air conditioning; providing temporary use of web-based applications for regulating, controlling and optimizing heat pumps and energy distribution networks, and equipment for heating, cooling, ventilation and air conditioning; providing temporary use of online non-downloadable software for regulating, controlling and optimizing heat pumps and energy distribution networks, and equipment for heating, cooling, ventilation and air conditioning; software as a service SaaS; software as a service SaaS featuring software for regulating, controlling and optimizing heat pumps and energy distribution networks, and equipment for heating, cooling, ventilation and air conditioning; platforms for regulating, controlling and optimizing heat pumps and energy distribution networks, and equipment for heating, cooling, ventilation and air conditioning as software as a service SaaS; design services; technical design and planning of heat pumps, heating installations and energy distribution networks; design and development of digital tools for designing energy systems and energy distribution networks.