VBW Engineering yellow SPS Ecobox heat recovery unit with glass sides
Photo: Mariusz Młynarczyk / CloudAir.tech
A yellow VBW Engineering heat recovery unit with transparent side panels reveals its cross-flow plate exchanger and fans, with an info card reading "SPS Ecobox" on top. Beside it stands a larger aluminium-framed ventilation unit with windowed doors, set against artificial grass and a forest photo backdrop.