Birlesim Mühendislik Isitma Sogutma Havalandirma San ve Tic AS engages in the provision of design and engineering services. Its services include heating, cooling, ventilation, sanitary installation, fire protection, and fire stop, natural gas distribution, and medical gas systems. The company was founded by Mesut Altan and Idris Çakir on June 13, 2002 and is headquartered in Istanbul, Turkey.