HEFAJSTO: Floor-Recessed Fireplace. The Patented Heart of Modern Interiors.

Mariusz Kondratowicz – Creator and Engineer of the HEFAJSTO Fireplace.

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The idea for the fireplace was born from the ambition to design a solution that redefines luxury space while preserving the openness of the home and an unobstructed view. As an engineer and designer, I set myself the goal of combining clean design with breakthrough, patented technology—which I exclusively own.

Even with a finished house design and completed flooring, I had to make certain modifications to integrate the new concept into the existing layout. After consulting the construction company—whether cutting an opening in the floor slab was feasible—I proceeded with the build. The construction process was multi-stage; some solutions proved spot-on, while others required adjustments. I relied entirely on trial and error.

On its first firing, the fireplace performed flawlessly, meeting every expectation. Its lower section consists of two types of stone, forming a harmonious whole. The stone in the base can be crafted in any pattern.

In winter, it delivers full heating performance; in summer, it retracts effortlessly—never obstructing the view or space in your home.

No need to worry if your home is already finished—HEPHAESTUS can be installed at any stage of the project.

I hope you love the design. If you'd like to share your thoughts or explore collaboration—get in touch.