Natural Ventilation – Hybrid Mode

Incorporating an ultra low power fan our new Mistrale ‘Fusion’ MFS might not immediately strike a full “natural ventilation” solution in the traditional sense however this modern fan assisted approach on natural ventilation does still allow us to harness this free natural cooling energy source reliably and efficiently with its “hybrid” features also delivering some significant added benefits.

One of the latest innovations in ventilation our new design “Fusion” terminal is designed  to provide an extremely low cost ventilation solution with the added benefits of some element of heat recovery.

Unlike a normal full natural ventilation solution MFS is a dynamic hybrid that includes an ultra low power fan assistance feature. The fan is designed to energise in poor air movement conditions in order to ensure adequate ventilation can be maintained at all times. Whilst fan power assistance may seem at odds with a low energy ventilation concept it is important to point out that the fan is there to provide only occasional support and ensures that the terminal operates at all times to provide the intended heat recovery and ventilation requirements.

And it is truly energy efficient!

With an annual design consumption of just 34kw per classroom Mistrale MFS is a low energy solution yet still assures full operational ventilation and cooling efficiency at all times.

Key Design Features

  • Standard Slimline Terminal MFS/128 (128 l/s output)
  • High Capacity Slimline Terminal MFS/256 (256 l/s output)
  • Compliant with D of E guidance on ventilation
  • Accurate air and temperature control with free cooling and heat recovery
  • Full summer evacuation mode with fan boost to meet all BB101 and PBSB overheat requirements
  • Includes CO2 override to meet current D of E guidelines
  • Operator overrides with easily adjustable set points
  • Clear indication of control strategy for users/occupants
  • Single wall or facade location with no need for either transfer into corridors or a stack reducing both cost and noise transfer
  • Low noise operation to meet current D of E guidelines (BB93)
  • Optional glazing panel positioning to avoid builders work
  • No ductwork requirement and maintenance free
Unlike other designs Mistrale MFS is a stand alone solution providing adequate ventilation and cooling without the need for supporting systems such as opening windows although it can still be integrated with other such equipment if required. The MFS uses natural air buoyancy with low power fan assistance to deliver a steady supply of fresh air from a single wall/window façade whilst allowing it to blend controlled amounts of mixed extract air an element of heat recovery.
The concept is simple and was driven by the need to enhance our natural ventilation solutions to include a unit that can be placed in a single wall or façade yet still be able to control the internal room space accurately all year round irrespective of weather, wind or temperature conditions and with the added benefit of using previously discarded warm air for heat recovery without a heat exchanger.

For more Mistrale MFS details please click on the link below.  


Your window on Natural Ventilation

Passive Natural Ventilation

Pure natural

Hybrid Natural Ventilation

Natural Ventilation with fan power assistance

Hybrid Roof Terminals

Natural roof vent with fan power assistance

Hybrid Heat Recovery

Natural Ventilation with heat recovery

Gilberts Mistrale Natural Ventilation Solutions are design led technologies that incorporate patented features which position them at the leading edge of modern natural ventilation design. Suitable for both stack effect and wind driven systems Mistrale comprises of all of the key the components you will need to design a robust, efficient and extremely effective natural ventilation system.

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