nawiewa

Nawiewa is a term used in building ventilation to describe the stream of air that enters a space as part of an air handling or ventilation system. In HVAC design, nawiewa represents the supplied air, which may be fresh outside air, tempered air, or a mixture of outside and recirculated air. It is typically contrasted with wywiewa, the exhausting air that leaves the space, and with recirculated air that is redistributed within the system.

In practice, nawiewa is delivered through ventilation openings such as nawiewniki (diffusers or air inlets) and ducts connected to air handling units. The characteristics of nawiewa—its flow rate, temperature, humidity, and velocity—are selected to meet indoor air quality, thermal comfort, and energy efficiency goals. Proper design aims to provide adequate fresh air while minimizing drafts and energy loss.

Key parameters used to evaluate nawiewa include the volumetric flow rate (measured in cubic meters per hour or similar units) and the resulting air change rate in a space. Measurement and control devices, such as anemometers and sensors, are used to monitor nawiewa and adjust it in response to occupancy, indoor pollutants, and setpoint conditions.

Nawiewa plays a central role in standards and guidelines for ventilation and indoor air quality. Its management affects occupant comfort, odor and pollutant removal, humidity control, and energy consumption. In modern buildings, nawiewa is often integrated with advanced control systems and air distribution strategies to optimize performance.

See also: ventilation, HVAC, air diffuser, air handling unit.