• Commercial Kitchens

Kitchens exist in many commercial buildings, such as restaurants, hotels, hospitals and retail malls and whilst each building has special requirements for its kitchens, many basics needs are common to all.

Kitchen ventilation has at least two purposes:

  • To provide a comfortable environment in the kitchen and
  • To enhance the safety of personnel working in the kitchen and of other building occupants

Kitchen ventilation is required to create a safe and comfortable working environment. Catering and cooking can produce significant quantities of fumes and vapours as well as large amounts of heat. Ventilation is necessary to remove these and discharge them to a safe external location.

This is usually achieved by mechanical extraction via a canopy hood installed over the cooking appliances. The ventilation system should also provide general ventilation throughout the kitchen.

It is particularly important to provide adequate make-up air for gas-fired appliances. The lack of an adequate supply of air, and/or incorrect fueling arrangements can lead to incomplete combustion and the accumulation of combustion products such as carbon monoxide.

The objectives of an adequate ventilation system are to:

  • Remove cooking fumes at the source, i.e. at the appliance
  • Remove excess hot air and introduce incoming cool clean air so that a comfortable working environment is achieved. Inadequate ventilation can cause stress, contributing to unsafe systems of work and high staff turnover Ensure that the air movement m the kitchen does not cause discomfort, e.g. from strong draughts
  • Provide sufficient air for complete combustion fired appliances, and prevent the risk of carbon monoxide accumulating
  • Be easy to clean, avoiding the build-up of tat residues and blocked air inlets which lead to loss of efficiency and increased risk of fire
  • Be quiet and vibration free

The ventilation system needs to be designed to take account of:

  • Cooking load
  • Amount of cooking equipment used
  • Layout and shape of the kitchen
  • Numbers of staff
  • The need tor easy cleaning and maintenance

The effective balancing of incoming cool air and extracted hot air should help prevent the kitchen becoming too hot. For mechanical make-up air systems. The cooler air can be directed towards hot work positions. High-level discharge of extracted air is often needed to prevent nuisance to neighbouring properties.

Front of house, a ventilation system removes smoke, keeps the restaurant or bar at a pleasant temperature and reduces humidity.

Changes in catering processes will probably require ventilation changes or new systems.

The caterer will need to provide detailed information for the competent advisor, designer and installer, including the following information:

  • Maximum demands likely to be placed on the ventilation (e.g. to cope with peaks of activity)
  • Amount and type of kitchen equipment
  • Menu
  • Number of meals
  • Number of staff

The ventilation design engineer will need to take into account:

  • Kitchen usage information from the caterer
  • Equipment information from the caterer or supplier, e.g. cleaning requirements, the amount of air required for complete combustion, and the performance of the existing installation
  • The requirements or specifications for air cleaning systems, e.g. for grease removal at the canopy and also before final discharge to outside atmosphere
  • The limitations of the building, e.g. the available room may influence the sites and routes for air inlets or discharges
  • Food hygiene requirements, e.g. identify a suitable source tor clean make-up air, prevent pest entry, avoid grease accumulations and ensure easy cleaning of the system
  • Heat control and waste energy recovery to maximise energy efficiency

Elta Fans provide a wide range of ventilation products for commercial kitchen applications, with a comprehensive range of commercial ventilation products, so for more information, please look at examples of typical products that could be used for these applications, or alternatively, please contact us to discuss your specific application requirements.