INFAS

INTEGRATED FACILITY SOLUTIONS

For clean water, efficient buildings, and safe, reliable operations.

We are a company specializing in integrated solutions in water, building, and environmental engineering. We provide consulting, planning, installation, and maintenance of systems that ensure energy efficiency, protection, and the long-term preservation of building assets.

FENSTER TUNING

H2OPTIMIZE

About Us

We are INFAS.

INFAS offers integrated solutions for buildings and technical systems, including water treatment, descaling, building protection, and functional window films for heat reflection to reduce energy and operating costs. With a high level of technical expertise and proven products, we support our customers in operating buildings more efficiently, conserving resources, and preserving asset value.

What We Stand For

Our Values

Quality, reliability, and sustainable solutions are at the core of INFAS. We focus on honest consulting, high-quality materials, and carefully tailored, individual concepts.

Innovation and responsibility shape our work: with our brands Fenster Tuning and H2Optimize, we combine technical expertise with the goal of bringing comfort, safety, and resource conservation into harmony.

Quality & Durability

We work exclusively with tested materials and proven technologies—delivering solutions that perform reliably over time and retain their value.

Honesty & Transparency

No standard sales pitches. We provide open, clear, and needs-based consulting—always focused on finding the best solution for our customers.

Innovation with Responsibility

We deploy modern technologies strategically to enhance comfort, safety, and efficiency—without placing unnecessary strain on resources.

Tailored Solutions

Every building and every requirement is unique. That’s why we develop customized concepts instead of one-size-fits-all compromise solutions.

Who we are

Our Team

Sebastian König

Founder | CEO

Expert in Innovative Water Solutions and Efficient Building Technology.

Matthias Zelina

Founder | CEO

Specialist in Sustainable System Solutions and Material Expertise.

Sven Olin

Founder | CEO

Specialist in Innovative Building and Window Film Solutions.

Services & Solutions

Comprehensive Solutions for Modern Buildings.

INFAS combines innovative technologies and expertise to make buildings efficient, sustainable, and comfortable. With our solutions, we optimize energy use, comfort, and resource efficiency—always tailored individually to your needs.

Energy Efficiency & Climate Comfort

Optimization of Heat, Light, and Climate through Smart Solutions for Windows, Facades, and Building Systems.

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Water & Resource Management

Sustainable Water Treatment, Descaling, and Filtration for Healthy and Cost-Efficient Use.

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Safety & Functionality

Protection, Design, and Durability for Buildings through High-Quality Materials and Innovative Technologies.

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That’s Where We Come From.

Our Brands

Fenster Tuning

Design Meets Function

Fenster Tuning offers high-quality window films for design, safety, and energy efficiency. Founded by Sven Olin, who has been active in the field for over two years and was introduced to the craft by his father, the company combines long-standing experience with customized solutions for modern buildings.

Energy Efficiency & Heat Reflection

Optimized window film solutions reflect heat, reduce energy loss, and create a comfortable indoor climate.

Safety & Protection

Durable films enhance glass resilience, provide privacy, and offer additional protection against break-ins.

Design & Aesthetics

Custom window and facade films that enhance appearance and give every building a modern look.

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H2Optimize

Water: Filtration, Descaling, Activation

H2Optimize provides high-quality water treatment solutions, including descaling, activation, and filtration. Founded by Matthias Zelina and Sebastian König, who have been active in the field for 1.5 years and were introduced to the industry by long-experienced partners, the company combines practical expertise with cutting-edge technology. In collaboration with the renowned German manufacturer H.Preiss International, H2Optimize delivers reliable and efficient water solutions for both residential and commercial applications.