BBP has been working on the development of ventilation plants with high efficiency heat recovery since 1996. Optimisation has been achieved in particular through the evaluation of numerous measuring projects. The air circulation for example is tested for air quality, acoustic emission and of course the heat saving.

The technical solution has been applied in almost 1000 apartments to date and was awarded the Thüringen energy economy prize in 2002.

Advantages
· reduction in heat consumption,
· ventilation and extraction at noisy locations,
· pollen free air for persons with allergies,
· improved home comfort,
· discourages formation of moulds

Temperatures Values (2001), 84 residences Johannes-Keppler-Platz Potsdam