Vaillant, a specialist in high energy-efficiency products, launched its new solar calculator program auroPRO, a useful support tool that facilitates the planning of solar thermal facilities. This new auroPRO program, available at the company’s website is free of charge, and is designed for sanitary hot water(ACS) applications in single-family, collective house or tertiary buildings, in covered or open swimming pools and mixed facilities (ACS and swimming pool).