DCV - Demand controlled air volume

DCV control principle, demand-controlled airflow

DCV is the variable regulation of airflow in each individual zone.

As well as being able to control the ventilation in each room according to when they are being used, airflow can also be regulated according to load with the help of CO2 and temperature measurements.

DCV principle

 DCV is typically used where there is:

  • Periodic use of the rooms
  • A large variation in the number of people using the room.
  • A large variation in heat load


School: Staff room, south-facing classrooms, after-school clubs, gymnasiums, changing rooms and laboratories and workshops.

Office: South-facing offices, open plan offices, meeting rooms, canteen/kitchen.

Characteristics Advantages Disadvantages

A timer and weekly plan control the basic ventilation

CO2 and temperature sensors gradually increase ventilation in individual rooms as load increases

- A regulator maintains a constant pressure in the ducts so that airflow is correctly distributed

Ventilation adjusts to load in the room

Fully automatic regulation

Less updating of week plan

Big energy savings

More expensive installation


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