The Chamber of Installation Specialists in Bulgaria (CISB) was established in April 1995 as a non-profit organization by decision of Plovdiv District Court 6257/1995 with headquarters in Plovdiv and regional offices in the cities of Sofia, Burgas, Varna and Ruse. CISB is a national branch organization of persons and companies with an established reputation at national level, operating in the field of HVAC, refrigeration, electrical engineering and automation, water supply and sewerage, gasification, energy saving technologies, renewable energy sources and environmental protection. At present members of the organization are more than 100 companies, entities and educational institutions, with an extensive experience in designing, carrying out feasibility studies, developing and implementing energy systems, Industrial automation, heat recovery, energy management, nearly zero energy buildings, which promote innovative solutions for intelligent HVAC and RES installations.CISB keeps an Official National Professional Register of installation specialists, which includes Bulgarian and foreign persons and legal entities performing installation activities in the country.A Vocational Training Center operates alongside the Chamber of Installation Specialists, under NAVET license 200512291. The VTC organizes different forms of training in the country and abroad to increase the qualification of the specialists from the installation branch in 18 different professions and also develops and runs qualification and re-qualification programs for the specialists in the installation branch, for example: Technician of Energy Systems & Installations, and Installer of Electrical Systems & Installations.In 2018, 479 trainees attended and completed different levels of training at the VTC in CISB.