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Bits and pieces about DCV!
News
June 18, 2014

Bits and pieces about DCV!

Demand controlled ventilation (DCV) is one of the most systems used in the installations in Swedish buildings.

Demand controlled ventilation (DCV) = ventilation based on the actual need – driven by temperature, CO2, mixed gas, etc

Good indoor environment pays off:

  • Even as little as only 1% increase in performance may correspond to the annual cost needed for ventilation of an office building.
  • Productivity improvements just under 10% may correspond to the total installation and operating costs of an office building.
  • The payback period for investment in improved indoor environment quality is often less than 2 years.

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The need to control in Sweden:

  • Average heating consumption in Swedish schools: 143 kWh/m2 per year
  • Heating consumption in DCV systems in the corresponding buildings: ca 60 kWh/m2 per year
  • Total area for schools in Sweden: 30 800 000 m2

 

Pitfalls and errors:

  • In our zeal to save energy, there is a risk that we are sabotaging indoor climate.
  • “Overkill” (over-dimensioning of HVAC components and system) when calculating the heating and cooling effects
  • Wrong system selection, which causes noise and draft problems
  • Do not try to save on the maintenance and repair

 

Source: Conny Nilsson´s presentation about Energy-efficient ventilation