Outdoor and exhaust air apertures

Outdoor and exhaust air apertures are openings in the building envelope through which a ventilation system draws in outdoor air and expels stale air to the outside. These apertures are arranged in such a way that the exhaust air is not immediately drawn back in again (recirculation). Ventilation systems that are equipped with heat exchangers extract heat from the extract air before it is expelled as exhaust air. This raises the energy efficiency.