Grade II Listed Kitchen Extract

application area: commercial kitchen extract

use type: school kitchen air extraction

project scope: line brick duct with four liners

added value: 25-year guarantee on liner, no need to fit and maintain chimney fans

Background

VentilFlex-25 engineers were to supply and install a bespoke kitchen canopy solution for a grade 2 listed school building in Hampshire. The bespoke canopy could not be fixed to the walls or the ceiling, which was 14 meters high.

The 20-metre ventilation shaft had metal supporting crossbars. This made it impossible for any rigid extraction ducting system to be installed without affecting the integrity of the structure. The client opted for a kitchen extraction system with a different approach – VentilFlex-25 RKV – a composite liner solution supplied in a flat and soft state. The bespoke-made liners are useful for ducts where access is difficult or if the duct has bends and offsets.

The main challenge of this installation was to insert and inflate 4 VentilFlex-25 RKV liners simultaneously. This way the liners would fill the available duct space evenly and act as a single large liner.

Statement of work

The steaming took a few hours, during which the high temperature started a chemical reaction in the composite structure which solidified the resin and gave the liners their final physical characteristics – tensile strength, high corrosion-resistance, high heat-resistance and an air-tight finish. The new VentilFlex-25 RKV liners provide an outlet for the gases coming from 3 combi ovens, 2 range ovens a fryer and a grill.