Turkish Society of HVAC and Sanitary Engineers (TTMD) was founded in 1992 with the goal of improving and fostering the services provided by Mechanical Engineers in heating, refrigerating, ventilating, air-conditioning, plumbing, insulation and control areas of the building industry. Today, TTMD has become an association where professionals from different disciplines, such as designers, consultants, reps, manufacturers, installers, operators, academicians etc, come together on a common platform for shared goals. The foremost objective of TTMD is to contribute to the training and research of our professional colleagues, especially consisted of architects and engineers. With this ultimate goal, the association organizes seminars and technical courses; workshops, symposia, and congresses; conducts national and international projects and supports the researches conducted by universities and various research institutes. Apart from these, TTMD stands as a member of international associations such as ASHRAE and REHVA which are established with the common aim of sharing knowledge in a global platform. TTMD regularly holds an “International HVAC+R Technology Symposium” once every two years, and an annual workshop does discuss a selected topic in detail, participates in national and international fairs and symposia in the sector, and publicizes and supports such activities. TTMD also publishes books for professional development, and a bimonthly journal addressing the sector with the title “TTMD Journal” (previously TTMD Bülteni for 35 issues). In addition, an English issue is published annually to promote our sector in an international level. On the other hand, training programs and seminars are held by our Regional Offices to improve the service quality of our colleagues. Our society tries to facilitate forming of bonds among our colleagues by bringing them together in various platforms, in addition to making a significant contribution to the sector by improving the quality of on-the-job training, which is among its purposes of the foundation. TTMD develops and supports R&D projects within the framework of university-industry cooperation, takes active part in the preparation of standarts and regulations, cooperates with public bodies in the preparation of regulations thus contributing to their conformity with the norms, develops and operates national and international projects (funded by EU, FCO,etc.), and continues its publishing and educational activities in the sector. TTMD has become a member of ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) in 1997, of REHVA (Federation of European Heating and Air Conditioning Associations) in 2000, and of CLIMAMED (Joint Organization of HVAC&R Associations of France, Italy,Portugal, Spain) in 2009.