Ventilation system for use in building, has housing with connections for supply, outlet, exhaust, and external air, where connections for supply and external air are exchanged when installation position of fan/heat exchanger are changed

摘要

The system has external and internal main components (3, 4), where the internal component includes a heat exchanger, a fan, a filter and a condensate drain. The internal component rotates within the external component. Housing has connections for supply air, outlet air, exhaust air and external air. The connections (14, 15) for the supply and external air are exchanged when the installation position of the fan/exchanger are changed. An independent claim is also included for a method for manufacturing a ventilation system.