Ventilation system

• What is the difference between an MV and an MVHR?

  A mechanical ventilation system (residential fan) draws polluted air out of the house. Fresh air is often supplied by tilting windows or permanent ventilation. The valves for extracting the polluted air are usually located in the 'wet' rooms, such as the kitchen, bathroom, toilet, storage room and any washing machine installation. The disadvantage is that the air is neither filtered nor preheated.

   

  A heat recovery system (MVHR) also extracts the polluted air from the above-mentioned rooms. However, it differs significantly from an MV system. The MVHR system draws in fresh air in directly from outside and passes it through a filter and heat exchanger. The supply valves are usually located in the living room, bedrooms, hobby room, hallway, etc. During the winter months, the MVHR system pre-heats the outside air with heat from the house. In the summer months, cooler fresh outside air can be blown in during the evening and at night.

• How do I know that my ventilation system needs maintenance?

  It is recommended that you have your ventilation system serviced regularly. Not sure when the last service was carried out? Look out for the following signs. If you recognise them, it is high time to have your ventilation system serviced:

  • There is a lot of dust in the house.
  • The unit makes an annoying noise.
  • There is high humidity in the house.
  • Food odours remain for a long time.
  • There is mould in the bathroom.
  • You experience burning eyes, coughing or allergies.

• What can I do myself to maintain my ventilation system?

  You can easily clean the valves yourself by soaking them in soapy water and brushing them. There is also a foam ring behind the valve. You can replace this over time. 

  Note: It is important to remember which position the valves are in when they are removed. This will determine how much air can flow through the valve. Make sure that the opening of the valve is the same when you replace it. If necessary, you can use a marker to make some marks on the inside (depending on the type of valve).

  Do you have an MVHR unit? Then you can easily change the air filters yourself. On average, it is recommended to change the air filters at least twice a year.

• The fan is making noise, what are the possible causes and how can I fix it?

  There are several possible causes for extra noise coming from a ventilation unit. Below are some common causes and possible solutions:

  • Dirty air filters: If the air filters in your MVHR ventilation unit are clogged or dirty, this can cause a reduction in airflow and an increase in noise levels. Check the filters and replace if necessary.
  • Incorrect installation: An incorrect installation of the ventilation unit can cause vibration and noise. Ensure that the unit is installed correctly and that all connections are tightened securely.
  • Air duct problems: Air ducts run throughout the house and can cause echoes and noise. If there are problems with the ducts, such as leaks or blockages, this can also cause abnormal noise. Have the ducts cleaned, inspected or repaired if necessary. Make sure you use the correct ventilation ducts and add silencers.
  • Fan motor problems: If the fan motor is not working properly, it may cause abnormal noise. Have a qualified technician check the motor and replace it if necessary. If your unit is still under warranty, we advise you to contact the installer or contractor first. 
  • Age of the unit: After +/-15 years it may be time to replace the unit completely. You may find that the unit is struggling to operate at higher settings and energy costs are increasing. Newer technologies make the units quieter and more energy efficient.

  A completely silent ventilation system is not possible, either the motor of the unit itself or the air flow through the ducts will generate noise. However, we recommend regular maintenance to keep the unit running optimally and to avoid unnecessary noise.

• Any leak? Tips for dealing with a leaking ventilation unit

  If your ventilation unit is leaking, this could indicate a problem with the unit itself. This unit removes humid air from the bathroom, kitchen and toilet. If the ventilation box is not working properly, the moist air can become trapped in the ventilation ducts. This can cause the moisture in the air to condense and enter the house through the vents, with all its consequences.

  The most common cause of a leaky ventilation unit is a clogged or blocked exhaust or condensation drain. Check these and clean them if necessary.

  It is also important to have your ventilation system serviced and cleaned regularly. We recommend that you book a service every two years to clean and inspect the unit. To prevent leaks in your ventilation system, it is also important to have the installation done by a professional.

• What to do if you have a smelly mechanical ventilation system?

  If you suffer from a smelly mechanical ventilation system, there are several steps you can take to tackle the problem:

  • Check the installation: Poor installations can cause bad smells. To ensure that the installation has been done correctly and that the ventilation system is working optimally, we recommend having the installation done by a professional technician. They will ensure that all components are fitted correctly and that the valves are correctly adjusted.
  • Maintenance: Accumulation of dirt and dust in the ventilation system can lead to the growth of bacteria and mould, which can cause unpleasant odours. Regular maintenance is important to keep the system working properly and to prevent odour problems. On average, a ventilation system should be serviced every 2 years. We also recommend a full service every 7-8 years.
  • Clean the ventilation ducts: The cause of the odour may be in the ventilation ducts. Cleaning these ducts may solve the problem. We recommend that you have this done by a professional. If you live in an apartment block and notice that the ventilation system smells, it is important to contact the manager or the owners' association. We recommend that you have the ducts cleaned and possibly disinfected every 7-8 years.
  • Replace the unit on time: An outdated ventilation system can cause odour problems. It is important to replace the unit on time to avoid problems.

  If, despite these tips, you still have a smelly ventilation system, it is best to consult a professional to diagnose and fix the problem.

• When should I have my ventilation system replaced?

  A mechanical ventilation system has a service life of approximately 15 years. We recommend that it is replaced at the end of this period to ensure a properly functioning ventilation system. Want to get the most out of your ventilation system? Then make sure it is serviced on time. Have you noticed that the system is making more noise? Or are you experiencing condensation? Then it is wise to have your ventilation system checked by a professional.

  Find out more in our blog.

• I want to have my ventilation system replaced. Which ventilation solution is most suitable for my home?

  The replacement of a ventilation system depends on the current ventilation system and the type of home. To find out which ventilation system is best for your home, we would be happy to put you in touch with one of our experts.

  Choosing the right ventilation box: tips and considerations.

• I want to have my old mechanical ventilation system replaced with a quieter and more compact model. What is the best choice for me?

  It depends on your current system and the type of property you have. Contact us and we will think with you and give you tailored advice.

  Choosing the right ventilation box: tips and considerations.

• Is it possible to have a mechanical ventilation system replaced by an MVHR system?

  In a mechanical ventilation system, only polluted air is mechanically extracted. With an MVHR system, air is both exhausted and supplied. Additional air ducts should be provided for this supply. These must be installed in the house. Are you considering replacing a mechanical ventilation system with a heat exchanger? If so, get in touch with one of our experts.

• How long will it take to replace my ventilation system?

  Replacing a mechanical ventilation system takes about 1 hour. Replacement combined with cleaning takes 1.5 to 2 hours. The replacement and adjustment of an MVHR system takes approximately 3 hours.

• I have had my ventilation system replaced. Should I order a maintenance service right away?

  Once your ventilation system has been replaced by our specialist technicians, the entire ductwork will be cleaned and the installation will be immediately ready for use. Therefore, it is not necessary to book a service immediately. However, please be aware of the importance of a well maintained system and unit. On average, a ventilation system requires servicing every 2 years, although this also depends on the brand and age of the system. A maintenance subscription with Intovent can take the burden off your shoulders.

• 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.