1. Home
  2. Service
  3. Information
  4. Frequently asked questions
  5. How to install cooker hoods

How to install cooker hoods

    • We recommend keeping ducts as short as possible. However, the longer the outlet duct, the more resistance it creates and this has a greater impact on the efficiency of the appliance. 

      If the outlet duct is too long, you can always opt for a recirculation cooker hood or a recirculation kit for your cooker hood. This technology allows you to get rid of odours and no outlet to the outside is needed.

      We have good reasons for our saying at Novy that it all starts with a cooker hood. The proper functioning of a cooker hood is partly determined by the correct installation of the appliance and it is important that you think about this at an early stage in the construction process. Well-kept outlet ducts play a crucial role in this. In order to be able to adapt the installation to your specific situation we offer a wide range of outlet ducts and other accessories.

       

       

       

       

    • For ventilation purposes it does not matter whether the motor is installed on the cooker hood, in the duct or at the end of the duct. The location mainly depends on the installation space available.
      If the maximum installation height is 35 cm, you can keep the motor on the cooker hood. If you do not have this much installation height you can opt for the Pure'line Compact or the cubic remote motor.

       

       

       

    • You only need the non-return valve with a roof louvre; it is already incorporated in external louvres. For roof louvres you should locate the non-return valve as close as possible to the roof louvre.  

    • One important function of the cooker hood is removing cooking fumes and odours as efficiently as possible. For optimum functioning, it is important to remember the following when installing the cooker hood:

       

      When using a circular outlet duct:

      • Use smooth, non-inflammable ducts with an internal diameter equal to the external diameter of the outlet connector on the cooker hood. The cooker hood requires an outlet duct measuring Ø150 mm. Extend flexible ducts to the maximum and cut them to size.
      • Do not reduce the outlet diameter. This will reduce the capacity and increase the noise level.
      • When connecting to a short outlet duct it may be preferable to fit a non-return valve in the duct to prevent draughts.
      • Use a hose clip or aluminium tape for an airtight seal.
      • When passing a duct through the outside wall, use the external louvre.

       

      When using a flat outlet duct:

      • Use flat ducts with rounded corners and air guides in the corners. These ducts are available from Novy.

       

      General:

      • Keep the duct as short as possible with as few corners as possible along its route to the outlet.
      • Avoid sharp corners. Ensure corners are rounded for good air movement.
      • When passing a duct through an outside wall which is a cavity wall, make sure the outlet duct completely crosses the cavity and protrudes slightly outside.
      • When passing an outlet through the roof, use a double-walled roof outlet with an adequate capacity.
      • Never connect to a smoke flue.
      • Ensure adequate ventilation. Fresh air can be allowed in by opening a window or external door slightly or by fitting a ventilation louvre.

      Incorrect installation can result in poor extraction, more noise, condensation and other undesirable effects.

      View our extensive range of installation accessories

    • Insufficient ventilationresults in a loss of efficiency. A cooker hood with an external outlet will only work optimally if the air that is vented externally is replaced by fresh air (via a louvre in the window, an open door or window, or from another room).