Opened Ventilus heat recovery unit exposing its fan and pleated filter

Photo: Mariusz Młynarczyk / CloudAir.tech

In the foreground, a Ventilus heat recovery unit is displayed with its front removed, exposing a fan, a pleated filter and blue-lined internal chambers. More units line the stand under the "Ventilus Rekuperatory" backwall, and visitors gather at the white Termitech counter beside a distribution plenum with blue ducts.