Kerf cabinets & furniture
the extractor fan inside a specially built box, constructed from the same Douglas fir the shelf is made from. At the top of the box is a vent. Because this house was designed to be environmentally passive (in fact, it isn’t entirely passive but is very close), air isn’t vented directly out of the side of the building. Instead, it is sucked upward and into a heat exchanger above the ceiling, which recycles warm air and expels cold, damp air.