About Us
Caldomax brand is a registered trademark of Semtes Mühendislik İç ve Dış Tic. San. Ltd. Şti.
As an Ankara-based company with experience since 1990, Semtes produces high-quality boiler tanks under the Caldomax brand.
In our tank production, the highest-quality system, enamel coating, is used. Polyurethane or sponge insulation is employed to minimize heat loss.
Our Product Groups
- ● Single Serpentine Boiler
- ● Double Serpentine Boiler
- ● Buffer (Expansion) Tank
- ● Accumulation Tank
- ● Electric Accumulation Tank
- ● Horizontal Boiler (Mini)
- ● Vacuum Tube Solar Energy
- ● Flat Plate Solar Energy
Custom Design and Manufacturing
In addition to standard dimensions and technical values, we can also make design modifications based on special requests from companies, manufacturing designs requested by our customers with 100% compliance.
Why Choose Us?
Since 1990, we have been delivering reliable heating solutions with superior enamel coating technology and an unwavering commitment to quality.
Enamel Coating Technology
Our tanks feature enamel coating exceeding 250 microns in thickness, compliant with DIN 4753-3, ensuring hygienic and long-lasting performance.
Wide Capacity Range
With capacities from 100 L to 3,000 L, we offer suitable solutions for residential, commercial, and industrial projects of all scales.
Custom Design & Manufacturing
Beyond standard products, we design and manufacture to custom specifications — achieving 100% compliance with project and client requirements.
High-Quality Insulation
We use polyurethane foam and high-density insulation materials to minimize heat loss, maximizing energy efficiency in every installation.
Superior Coil Heating Area
Caldomax coil boilers feature an enlarged serpentine surface area for faster, more efficient heat transfer — delivering superior performance over comparable products.
Export Experience
Alongside our strong domestic presence, we bring international export experience — manufacturing to global quality standards and reaching customers across multiple countries.