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Recommendations on DCV requirements and controls!
News
January 15, 2015

Recommendations on DCV requirements and controls!

When correctly implemented, DCV can reduce the energy consumption of ventilation by more than 50%. Setting proper requirements is crucial in order to reach this goal. We recommend a certain number of requirements. The most important are:

  • maximum SFP for design airflow rate and defined reduced airflow rate
  • compliance of the variation of airflow rate at room level and in the main duct
  • documentation in the form of a functional description and a DCV diagram
  • balancing and control of the airflow rate in the form of a completed control form for maximum and minimum load
  • authority, accuracy and lifespan for the chosen sensors and DCV dampers
  • maintenance and calibration-free CO2 sensors
  • good/suitable placement of sensors
  • use of DCV dampers with robust pressure sensors relatively to soiling
  • measurement of SFP before the frequency converters with a suitable method
  • coordinated functional check for the whole ventilation system,

Expect deviations. Forecast time to improve the system. Agree in advance on an economic compensation scheme for the deviations from the requirements related to energy.

Source guidebook SINTEF Research 24 Demand-controlled ventilation – requirements and commissioning