Heating Components

White Appliances Components

Leading Products in Heating and Home Appliances Industries

About Our Company

Önaysan Endüstriyel Ürünler was established in Istanbul, started its activities by providing white goods, electronics, heating, cooling, automotive and many other metal and aluminum components. Önaysan has taken steps to expand its product range in heating and white goods industries. With its high quality products and services, it has got a considerable share in both industries, in a very short time.

In order to meet the needs of the HVAC industry, Önaysan started with an R&D team of about 10 people, whose objective was to reduce the costs in the industry, by producing import substitute products. Önaysan started a feasibility study on products by analyzing industries.

Consequently, it has started to provide components in large quantities with the project of expansion vessels used in residential boilers. In about 5 years, Önaysan managed to become a company, which provides more than 70% of the expansion vessels used in local boiler industry. Önaysan started expansion tank exports in small quantities in 2015, reached 15 countries by 2019 with the joint projects that have begun in recent years.

Condensers, another leading product, have given Önaysan opportunity to have share in the white goods industry. Our company now providing A, B and C energy efficiency condensers to both local and European markets.

Today, Önaysan Expansion Vessels and Condensers are preferred by 40 brands and used in more than 200 products.

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Önaysan Eskişehir Factory

Why Önaysan ?

Önaysan invests in its facilities by regarding new technologies and trends, serves with 6 Expansion Vessel Production Lines, 4 Condenser Production Lines and 55 Press Machines

Individual Approach

We offer alternative metal types, membranes, pipes and other connection equipments by regarding customer expectations.

Technologic Facilities

Our products are made with glueing, clamping, welding and other automation systems, which are eliminated from human factor.

Modular Production Lines

Our facilities are serving with modular lines and fast tool and equipment change methods.

Contact us for any combi boiler and heating equipment projects !

Business Partners

+ more customers in Turkey, Europe and Asia

Our Services

Expansion Vessel Production

Önaysan expansion vessels are designed customizable from 4 liters to 12 liters with more than 20 models.

Condenser Production

Önaysan condensers performs B and C energy efficiency and customizable according to customer expectations.

Boiler Parts Production

Our company produces front panels, U cabins and other connection metals which helps customer on supply chain managements.

Radiator Parts Production

Önaysan produces all metal parts of radiator, makes powder coating and plastic assembling.

R & D Services

R & D team provides product design services and offers efficiency improvements every year.

Tooling and Machining

50% of the machinery and all tools used in our factories are made in Önaysan Tooling & Machining facilities.

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Our Process

  • 1.

  • 2.

Product Design

We are developing the product and making modifications on it with a collaborative work of R&D departments.

Sample Production

Önaysan produces samples with prototype tools, and both Önaysan and the customer takes these parts into relevant tests.
  • 3.

  • 4.

  • 5.

Approval Period

Önaysan and customer make an agreement on sample test results and quality documents such as PPAP.

Trial Production

We produce first batch with low quantities and dispatch to the customer. We imporve the product according to field and assembling results.

Serial Production

Serial production begins when the product meets customer expectations in technical and visual aspect.


Istanbul Headquarter & Factory

Dudullu Organize Sanayi Bölgesi 1. Cadde No: 18 Ümraniye, İstanbul TURKEY

Eskişehir Factory

Organize Sanayi Bölgesi 7. Cadde No: 19 Odunpazarı, Eskişehir TURKEY

Istanbul Phone

+90 (216) 528 26 00

Eskişehir Phone

+90 (222) 236 19 94




Monday - Friday 08:00 - 17:30

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Please contact us for any questions on sales, human resources, purchasing and technical issues.

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