DemirDöküm, carrying out its activities in heating, water heating, and air conditioning sectors, was established in İstanbul in 1954. Since its establishment, DemirDöküm has made contributions to the development of Turkish industry, realized many new investments, provided advanced technology to its consumers, and increased the quality in the sector every day.

Turkish consumers have met many devices, systems, and services in heating sector via DemirDöküm. The brand of our company, which realized the production of the first cast iron radiator, boiler, heating stove, floor standing, gas water heater, panel radiator, and wall hung boiler in Turkey, has been identified with "heat comfort".

DemirDöküm provides service to its customers with its widespread vendor organization, which has a robust engineering infrastructure, regarding both product sales and turnkey system providing. Besides, it provides immediate after-sales services with its strong service organization by prioritizing customer satisfaction.

Today, DemirDöküm is the leader in Turkish heating sector with its widespread authorized dealer, authorized service, and sales point network.

DemirDöküm, incorporated by the leader company of world heating sector, Vaillant Group, in 2007, combines the important steps it takes in export with its leadership in the domestic market, also by the contribution of this synergy.


The firsts provided by DemirDöküm in its sector in Turkey:

  • The First Cast Iron Radiator
  • The First Panel Radiator
  • The First 25mm Pitch Panel Radiator
  • The First Cast Iron Boiler
  • The First Gas Water Heater
  • The First Electrical Storage Water Heater with a Polyurethane Body
  • The First Wall Hung Boiler
  • The First Condensing Wall Hung Boiler
  • The First Gas Fuel Heating Stove
  • The First ISO 9002
  • The First 10-year warranty (Panel Radiator)
  • The First Patterned Plain Surface Panel Radiator
  • The First Coat Stand Panel Radiator
  • The First Decorative Air Conditioner Exterior Unit
  • The First Fuel Cell Bipolar Plate
  • The First Rollbond Solar Collector

R&D Activities

In the projects realized within the scope of DemirDöküm R&D activities, the software and hardware designed by DemirDöküm R&D engineers are used, and the objective is meeting the developing and changing consumer needs to the highest level.

With the implementation of strategic use of environmental, renewable and alternative energy resources and efficiency, producing individual solutions with system approach, and automation-communication technology, solar energy systems, cascade solutions, and smart control systems are among the basic R&D subjects.


Our Quality

In Turkish DemirDöküm factories, quality systems are applied within a comprehensive process from raw material/material entry to subsidiary industry assessments, from production to control at shipping point. In production, all employees undertake quality responsibility as a principle with OPF (one-piece-flow) technology, in addition to the control methods such as 5S, FMEA, 6 Sigma, Kaizen, and SPC.

In all production processes realized at our plants, protection of the environment is the main input. Heat exchangers of wall hung boilers and gas water heaters are coated with water-based aluminum dye, non-hazardous to environmental and human health. Technological and domestic waste water produced at factories are biologically and chemically refined at developed treatment plants and solid wastes are disposed in accordance with the regulations.

In this context, both our products and plant have quality conformity certificates valid both in Turkey and in the world. Our plant in Bozüyük is the first establishment to obtain the first ISO 9000 certificate in Turkey.



DemirDöküm, which initiated its export activities in 1968 by selling cast iron radiator to Jordan, exports to more than 40 countries on a geography extending from China to Chile with its broad product range. We aim at establishing long-term cooperation with our partners in the countries we export to, and carry out our activities within a structure indicating the power of our brand also in these markets.

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