Temperature regulation functions

What it is: Maintains a constant supply air temperature regardless of room load.
How it works: The AHU adjusts heating or cooling to keep the supply air at the setpoint.
Where it’s suitable: Buildings with predictable loads, such as corridors or storage areas.

What it is: Maintains a constant room or extract air temperature by adjusting supply air temperature.
How it works: Sensors in the extract air or room provide feedback to the AHU.
Where it’s suitable: Spaces with variable loads, like fitness studios or classrooms.

What it is: Adjusts supply air temperature in relation to extract air temperature.
How it works: Keeps supply air a few degrees lower than extract air for optimal heat recovery.
Where it’s suitable: Buildings with internal heat gains, such as gyms or offices with equipment.

What it is: Adjusts supply or extract air temperature based on outdoor temperature.
How it works: Uses a performance curve to adapt to seasonal changes.
Where it’s suitable: Buildings in cold climates, like schools or daycare centers.

What it is: Switches between two regulation modes depending on outdoor temperature.
How it works: For example, ERS in winter and supply air control in summer.
Where it’s suitable: Mixed-use buildings with varying seasonal needs.

What it is: Lowers temperature setpoints during unoccupied hours to save energy.
How it works: Uses time schedules to reduce heating or cooling at night.
Where it’s suitable: Fitness centers or offices that close at night.

What it is: Pre-heats the building before occupancy.
How it works: Starts earlier to reach comfort temperature by opening time.
Where it’s suitable: Gyms or daycare centers that need quick warm-up in the morning.

What it is: Temporarily increases airflow to deliver more heating or cooling.
How it works: Fans run at higher speed when temperature deviation is large.
Where it’s suitable: Spaces with sudden load changes, like group classes or events.

What it is: Uses cool outdoor air at night to pre-cool the building.
How it works: Runs the AHU at night when outdoor air is cooler than indoors.
Where it’s suitable: Gyms or offices to reduce next-day cooling demand.

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What it is: Prevents condensation in uninsulated ducts.
How it works: Raises supply air temperature if dew point is reached.
Where it’s suitable: Buildings with cooling and uninsulated ducts.

What it is: Adds a second temperature control zone.
How it works: Controls heating/cooling separately for two areas using one AHU.
Where it’s suitable: Fitness centers with a warm yoga studio and a cooler gym hall.