A Helios decentralised Mechanical Ventilation with Heat Recovery (MVHR) system efficiently recovers heat from all ventilation units which are strategically positioned around your home. Helios KWL heat recovery units are installed in exterior walls, requiring no ductwork throughout your home! This is just one of the many benefits of Helios decentralised ventilation systems. These systems are suitable for new build and retrofit applications alike.

This "push-pull" system is the modern and highly efficient solution for installing ventilation with heat recovery into an existing building, something that was once impossible.

The Helios KWL Heat Recovery unit is an ideal ventilation solution for your home. Helios KWL fans generally operate in pairs but can also operate in uneven numbers. Therefore, an even number of units must always be installed in a property to ensure the units work properly.

How the Helios KWL works…
At first, it extracts air whilst absorbing the heat within the unit’s core. When the core is fully charged with heat, the fan changes direction & draws fresh, filtered air, from outside through the unit and into the room, whilst transferring the stored heat into this fresh air. Each Helios KWL unit is wired together with another, and whilst one unit is extracting, the other is drawing fresh air inwards – and vice versa. The Helios KWL fan with heat recovery has a tiny power consumption resulting in electricity costs of only a few Euro per annum!

Because Helios Heat Recovery units operate in pairs, the air within the home is kept balanced at all times and without risk of this getting altered. On account of the decentralised concept, the individual fans can be installed exactly where they are required. There are no ducts to be installed, meaning a simple installation process for both new-build and retrofit. In the case of an uneven number of units being installed, your commission technician will set up your system to ensure that the incoming air exactly balances with the extracted air.

Helios ELS and M1 highly efficient extract units are installed in wet rooms to provide extraction of moisture on an "on-demand" basis. This means that these extract units are only utilised when the wet rooms are actually in use. So, although the exhaust units don't offer recovery of heat, because they are only used periodically, the overall efficiency of the heat recovery system is only reduced by 1 - 2%*.

This way, heat is recovered from the vast majority of air exchange, but the cost is significantly reduced by utilising the less expensive extraction units in the wetrooms. 

* According to independent research

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The main benefits of a Helios Mechanical Ventilation System with Heat Recovery are:

• Decreased moisture levels – significant reduction in the possibility of condensation & mould;

• A healthy & cosy indoor climate - improved air quality throughout the home as a result of constant fresh air supply;

• Protection of the building fabric itself, which increases the value of the property!

• Highly efficient heat recovery – 91% efficiency!

• Low-cost maintenance – filters can easily be removed, washed and reused by the homeowner!

• No ducting required – no risk of ever having to clean ducts or remove smells

• Advanced, user-friendly controls;

• Almost silent fan operation – quieter than centralised ventilation systems and cheaper extract systems;

• Extremely low energy consumption.

Please see our graphic below for further explanation.

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