Ozthermal liquid - gas fuel operated boilers are between 6 -20 atu pressure 100.000 kcal / h and 5.000.000 kcal / h heat capacities, they are designed and manufactured in accordance with TS-377 in a 3-wheel drive system with flame and smoke pipe. Boiler that combines the advantages of long-lasting, high-efficiency, standards-compliant materials and manufacturing, meticulous quality control, ease of maintenance and operation safety. The boiler furnace is made flat or corrugated according to the need, and the welding seams are subjected to radiographic inspection and normalization annealing, if necessary. Following the production, cold pressure test is applied to all boilers 1.5 times the operating pressure. It has CE Certificate, Turkish Standards TS 377 Certificate of Conformity and TS-EN ISO 9001:2000 Certificate. support is provided.