Black flexible duct presented to a visitor at Prowent

Photo: Mariusz Młynarczyk / CloudAir.tech

Staff at the Prowent stand point to a black flexible duct in the foreground while talking with a visitor. The blue back wall reading "To, czego potrzebujesz" and the hanging Prowent "Kominki • Wentylacja" sign fill the background, with a chimney brush display at the side.