Mechanical ventilation with heat recovery guide

How to use your mechanical ventilation with heat recovery system efficiently

Mechanical ventilation with heat recovery systems provide filtered air into your home. The system controls humidity and condensation within the home. It provides a continuous flow of fresh air. Air with high humidity levels is extracted continuously from wet rooms.

In the summer months you should use the summer bypass function. This stops incoming air from being heated. It ensures that the incoming air is no hotter than that outside the home. It also prevents energy and money being wasted on warming up incoming air.

Mechanical ventilation with heat recovery systems also have a boost function. This should be used when more ventilation is needed.  When the boost function is used, the system extracts moist air at a higher speed. For example, use it during a long shower or bath when the moisture level in the bathroom is high.

The essentials to managing your mechanical ventilation with heat recovery system – in brief:

Try to

  • Learn the functions of the mechanical ventilation with heat recovery system. This will maximise comfort inside the home.
  • Use the boost function when additional ventilation is required. Remember to switch off the boost function when it’s no longer needed.
  • Use the summer bypass function in the summer months when incoming air doesn’t need to be heated.

Avoid

  • Switching off the mechanical ventilation with heat recovery system. This is because the system is designed to run continuously.

More detail if you need it

What is a mechanical ventilation with heat recovery system?

Mechanical ventilation with heat recovery systems provide fresh, filtered air to rooms. They retain most of the energy that has already been used to heat the building.

How does a mechanical ventilation with heat recovery system work?

They work by extracting moist, polluted air from the wet rooms of a house e.g. kitchen, bathroom, toilets and utility rooms. They supply air to rooms such as bedrooms, living rooms, studies. The extracted air is taken through a central heat exchanger. This recovers and retains the heat that would otherwise be lost from the extracted air. In cooler seasons, this heat is used to warm the fresh, filtered air that the unit is supplying to rooms such as bedrooms and living rooms.

Useful links

Examples of guides for Zehner ComfoAir MVHR systems (please note that these might not be specific to your system):

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