About Us

About Us

DERRMAN is an innovative brand born from the 30+ years of industry experience and reliability of Özerteknik İklimlendirme ve Enerji A.Ş., bringing modern technology, energy efficiency, and sustainable heating solutions into living spaces.

Powered by a strong engineering background and deep sector expertise, DERRMAN delivers professional solutions in heating, energy storage, and hot water systems for both residential and commercial applications.

Our product portfolio includes:

EVI DC Inverter Monoblock Heat Pumps

Solid Fuel Manual Boilers

Hygienic Single Coil Boilers

Accumulation Tanks

Energy-efficient heating solutions

Each of our products is designed with a strong focus on durability, performance, efficiency, and long-term reliability.

At DERRMAN, we carry forward Özerteknik’s long-standing vision of being “a company that always introduces the latest technologies to its customers first.” By closely following global developments in climate control and energy technologies, we continuously improve our product range in line with today’s and tomorrow’s needs.

With a customer-oriented approach, we aim not only to provide products, but also to deliver reliable service, professional project support, and sustainable comfort solutions that add value to every living space.

Our mission is to combine over 30 years of industry knowledge with modern engineering and innovative technologies to provide highly efficient, environmentally friendly, and future-ready heating systems under the best possible conditions.

With strong infrastructure, advanced technology, and trusted service, DERRMAN is heating the future.