TOLL HKLS is an independent mechanical engineering and energy systems consultancy specializing in heat pumps, hydronic systems, and renewable energy solutions for residential, multi-family, and commercial buildings across Europe.
Founded in Türkiye in 2017 and expanded to Germany in 2023, TOLL HKLS combines hands-on engineering expertise with international project experience, supporting projects from early-stage system design to on-site technical supervision and commissioning support.
In recent years, our focus has increasingly shifted toward air-to-water heat pump systems, low-temperature heating concepts, and integrated hydronic solutions — particularly for multi-family housing and commercial applications. Our scope of work includes load calculations, hydraulic system design, system optimization, and close coordination with manufacturers and suppliers across Europe.
A key milestone in this development was the 2022 MCE Milan trade fair, where Tol Engineering established direct relationships with selected Italian manufacturers and initiated the import of specialized HVAC and hydronic products for project-based applications in Türkiye. This step marked the transition from local project delivery toward a more international, manufacturer-oriented engineering approach.
In early 2023, TOLL HKLS took an active role in the European market entry and project development of ALDEA Heat Pumps, supporting technical planning, system engineering, and commercial project execution. This collaboration resulted in multiple commercial and residential heat pump projects in Switzerland, strengthening our expertise in cross-border project coordination and compliance with local technical standards.
With more than 500 completed HVAC and heating system installations and a growing portfolio of European references in Germany, Switzerland, and other EU markets, TOLL HKLS positions itself as a reliable engineering partner — combining technical precision, practical experience, and a clear understanding of regional regulations and project requirements.
Selected Milestones
- 2017 – Foundation in Türkiye, delivering residential and commercial HVAC and heating system projects
- 2022 – Establishment of direct manufacturer partnerships following MCE Milan; initiation of project-based product imports
- 2023 – Active involvement in the European market entry and project development of ALDEA Heat Pumps, including commercial projects in Switzerland
- 2024 – Expansion of multi-family and commercial heat pump references across Germany, Switzerland, and other EU markets
- End of 2025 – Strategic decision to fully focus on European project engineering, technical supervision, and cross-border project coordination