Measuring and calibrating

• What does valve calibration and adjustment mean?

  This means that the system is set to deliver just the right amount of air to the rooms. The amount of air is called the capacity. We adjust the valves and the fan so that the legally required capacity is always achieved.

• Why is measuring and calibrating important?

  The Building Regulations require certain rooms to have a minimum ventilation capacity. For optimum performance and noise reduction, it is important that the valves are set correctly.

  Adjustment is even more important for an MVHR system than for a mechanical ventilation system. With an MVHR system, it is very important that the system is balanced, i.e. that the same amount of air is being supplied as is being extracted. An imbalance can lead to draught problems, health problems and unnecessarily high energy bills. Calibration should always be carried out by a professional.

• Draughts in your home?

  Do you have draughts in your home? You may be tempted to close the vents and grilles, but this is not a good solution. Closing the grilles prevents the ventilation system from working properly and can create an unhealthy indoor climate. It is better to tackle the cause of the draught.

  Possible causes and solutions:

  • The ventilation system is not properly balanced. This can lead to too much air being exhausted, creating a negative pressure in the house and causing draughts through cracks and seams.
    
    • Solution: Contact a professional technician to balance the system. They can ensure that enough air is being extracted and supplied to prevent draughts.
  • The grilles and valves are blocked or dirty. This can result in insufficient air being exhausted, creating overpressure and draughts.
    
    • Solution: Clean the grilles and ensure that sufficient air can pass through them. If the grilles are very dirty, consider replacing them. Note: If the original settings are changed, the ventilation system may become unbalanced.
  • The temperature in the house is unevenly distributed. This can cause air currents that are perceived as draughts.
    
    • Solution: Check that the radiators are working properly and that there is enough air coming out of the grilles. Ensure that there is no furniture in front of the grilles that could obstruct the airflow and move the grilles to a higher position, preferably above the radiators.

  If you have followed these steps and are still experiencing draughts in your home, it may be advisable to consult a professional to diagnose and rectify the problem. Have your ventilation system checked and maintained. A properly functioning ventilation system can help reduce draught problems.