At the cucumber nursery Vieverde in Castenray (Netherlands) they have invested in the Air+Energy system that heats dry air outside with moist greenhouse air being led out. The system is provided by Maurice Kassenbouw. Initially the dry outside air was blown in through an unducted outlet. This has been adapted to improve climate equality. In this video Ed Classens elaborates on the operation and his experiences.
Source: Kas als Energiebron