To maintain the ratiotherm quality assurance and be able to offer the end user and consumer the highest level of assurance that their heating and/or domestic hot water heating (hot water supply) using ratiotherm technology can be professionally installed, commissioned and serviced, the respective specialist company is to take part in a minimum of a 2-day certified training course prior to supplying products from the product line of OSKAR-10/...component technology, control technology, accessories and project-related, specially manufactured custom products.