Open Orka heat recovery unit next to a grey ventilation unit

Photo: Mariusz Młynarczyk / CloudAir.tech

A heat recovery unit labelled "Orka" is shown with its lid open, exposing the red and grey heat exchanger inside. Beside it are a large anthracite ventilation unit and a galvanised inline box fan on the Soler & Palau stand, with the "Improving indoor air quality" screen in the background.