Demand Controlled
Ventilation Systems

Introducing Demand Controlled Ventilation

Demand Controlled Ventilation is a controlled method of ventilating your home that links the amount of fresh air supplied to the occupancy of the home. DCV systems continuously monitor indoor air quality measuring parameters such humidity (H2O), carbon dioxide (CO2) and Volatile Organic Compounds (VOCs) which are harmful to our health. As these levels fluctuate daily so too does the DCV system ensuring that the flow rates are sufficient when levels are high. The system runs in trickle mode when air quality is good. This ensures optimum ventilation throughout the home using the minimum energy to do so.

Fitting a DCV System

A demand controlled fan unit is installed in the attic/ utility or plant room. A separate duct is installed from the fan unit to the wet rooms such as the kitchen, utility, bathrooms & WCs. Sensors, fitted inline in the duct, or in the room, depending on the brand used, measure air quality in each area. Based on these readings, humid or stale air is extracted from the wet areas and fresh air is drawn into to the house through wall or window vents strategically positioned in each habitable area such as bedrooms, living rooms etc.

Benefits of DCV Systems

  • DCV systems are demand controlled meaning each room is ventilated at the optimum level
  • DCV systems are significantly more cost effective to run versus other ventilation systems using as little as .2 to .5 w/l/s. This translates to running costs of less than €50 p/year
  • DCV systems are automatic and as such demand no user interaction Ensures no mould/ condensation issues throughout the property
  • DCV systems are suitable for new and existing buildings.
  • DCV systems are very quiet when operating, running at approx. 25-30dB
  • DCV systems do not require filters
  • DCV systems ensure optimal security as occupants do not need to open windows for ventilation purposes

Check out our Frequently Asked Questions


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