Gilberts MFS-V offer a further innovation in hybrid natural ventilation.  Our standard MFS solution allows hybrid ventilation to be provided in a typical classroom using the exterior wall façade. For areas where a side wall is not available however our hybrid MFS-V offers the perfect partnering solution.

The MFS-V provides a roof top hybrid natural ventilation solution. Perfect for internal zones such as auditoriums or other areas where sidewall solutions may be problematic such as sports halls.

The solution is designed to comply with the design guidance for PBSP prescribed in Department of Education’s Guidance on Ventilation, thermal comfort and indoor air quality in schools and the Latest BB93 Department for Education Acoustic Performance Standards for schools

A penthouse turret on the roof builds onto a vertical sleeve which terminates with an air distribution plenum inside the space. The terminal uses natural air buoyancy with low power fan assistance to deliver a steady supply of fresh air from whilst allowing it to blend controlled amounts of mixed extract air for heat recovery.

So MFS_V is  a dynamic hybrid that includes an ultra low power fan assistance feature able to energise in poor air movement conditions to ensure adequate ventilation at all times. The fan is there to provide only occasional support ensuring that the terminal operates at all times to provide design heat recovery and ventilation requirements.

And it is truly energy efficient. With a design consumption of just 34kw per year per classroom Mistrale MFS-V costs less than £5* per classroom per year yet guarantees full operational ventilation and cooling efficiency at all times.

Unlike other designs, Mistrale MFS is a stand alone system providing adequate ventilation and cooling without the need for supportive systems such as opening windows although it can still be integrated with other heating, cooling or ventilation strategy if required.


  • Energy efficient ventilation solution
  • Compliant with DoE 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 PBSP 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
  • Low noise operation to meet current D of E guidelines (BB93)
  • No ductwork requirement and maintenance free