Inventer have pioneered the production and development of decentralized ventilation systems with a ceramic heat recovery core at their factory in the heart of Germany since 1999. A natural characteristic of ceramic is that it can accumulate heat very easily, while the honeycomb structure of the core consists of 80% air and 20% ceramic. In this way, it can maintain a high airflow with an equally effective heat recovery and very little energy input. The ceramic heat accumulator is the main element to every Inventer single room heat recovery ventilation unit.