displacementventilatsioon

Displacementventilasjon is a ventilation strategy designed to improve indoor air quality by introducing fresh air directly into the occupied zone and removing stale air at a lower level. This method leverages the natural buoyancy of warm indoor air to promote efficient air circulation and contaminant removal.

In displacementventilasjon systems, supply air is introduced at low velocity through diffusers placed near the floor or at low wall levels. The warm indoor air rises naturally toward the ceiling, carrying pollutants and humidity upward, where they are extracted via exhaust outlets often located at higher points within the space. This process supports a stratified airflow pattern, which can enhance comfort levels and reduce energy consumption compared to traditional mixed ventilation systems.

Displacementventilasjon is particularly suitable for spaces with high ceilings or those requiring strict control of indoor air quality, such as hospitals, laboratories, and cleanrooms. Its advantages include lower energy costs due to reduced fan power, improved thermal comfort through more uniform temperature distribution, and better removal of airborne contaminants.

However, proper design and installation are critical to prevent issues such as drafts at seating areas or insufficient air mixing. Factors like room layout, occupancy levels, and contaminant sources influence the effectiveness of displacementventilasjon systems. When properly implemented, they contribute to healthier indoor environments and more sustainable building operation.