General airflow regulation functions

What it is: Maintains a fixed airflow regardless of pressure changes in the duct system.
How it works: Fan speed is adjusted automatically to keep the airflow constant, even if filters get dirty or dampers close.
Where it’s suitable: Buildings with stable occupancy and predictable loads, such as small offices or classrooms.

What it is: Maintains a constant duct pressure, allowing airflow to vary as zone dampers open or close.
How it works: A pressure sensor in the duct measures pressure, and the AHU adjusts fan speed to keep it at the setpoint.
Where it’s suitable: Systems with variable air volume (VAV) terminals, such as open-plan offices or schools with multiple zones.

What it is: Adjusts airflow based on actual demand, often using CO₂ or VOC sensors.
How it works: When occupancy is low, airflow is reduced; when CO₂ rises, airflow increases.
Where it’s suitable: Spaces with varying occupancy, like conference rooms, daycare centers or auditoriums.

What it is: One fan follows another to maintain balance between supply and extract air.
How it works: If the supply fan is pressure-controlled, the extract fan adjusts to match its airflow.
Where it’s suitable: Systems with separate supply and extract fans, ensuring balanced ventilation.

What it is: Allows manual adjustment of airflow between two levels using an external signal.
How it works: A potentiometer or external control changes the airflow setpoint within a defined range.
Where it’s suitable: Assembly halls or gyms, where extra ventilation is needed during events.

What it is: Temporarily locks fan speed for up to 72 hours.
How it works: Used during commissioning or balancing to stabilize airflow while adjustments are made.
Where it’s suitable: Installation and service situations.

Outdoor air compensation

What it is: Adjusts airflow based on outdoor temperature.
How it works: Uses a performance curve to reduce airflow in very cold or hot conditions, saving energy.
Where it’s suitable: Daycare centers or schools, where full airflow isn’t needed during extreme weather.

What it is: Controls motorized dampers in diffusers to optimize air distribution.
How it works: Adjusts diffuser pattern based on heating or cooling mode.
Where it’s suitable: Comfort-critical spaces, like offices or hotel rooms.

What it is: Corrects airflow for changes in air density caused by temperature or altitude.
How it works: Sensors and algorithms adjust fan speed so actual airflow matches the setpoint.
Where it’s suitable: Cold climates or high-altitude locations, ensuring accurate ventilation.

What it is: Maintains correct extract airflow by compensating for leakage and purging in rotary heat exchangers.
How it works: Continuously measures pressure balance and adjusts extract airflow.
Where it’s suitable: Systems with rotary heat exchangers, ensuring proper energy recovery and hygiene.

What it is: Advanced optimization when GOLD is connected to Swegon’s WISE system.
How it works: SuperWISE sends optimized pressure setpoints to GOLD, minimizing fan energy.
Where it’s suitable: Large buildings with demand-controlled systems, like offices or hospitals.