English: This sketch shows how the ventilation device, which I patented in 2007 with a scheme, has to be built in detail.

Most important is that the air-streams for the used- and the fresh air are not mixed! Neither inside nor outside of the building! This is being done wrong by ALL companies who have started producing this ventilation with highly efficient heat recovery based on my patents in 2007 and 2020. Mixing of the air-streams lead to low efficiency in the number one purpose of ventilation, which is exchanging used air for fresh air.

This type of decentralized ventilation can save 15% of the entire energy expenditure of countries like Germany. I publish it freely now, because my company TS Prototype-Creation has already developed even better ventilation systems now including seasonal heat storage.