Gas Interlock systems are recognised as an essential safety aspect of all modern Commercial kitchens. The Basic function of a gas interlock system is to supply gas to the appliances when it has been proved that the ventilation system is functioning.

IGEM/UP/19 "Design and application of interlock devices and associated systems used with gas appliance installations in commercial catering establishments" gives guidance on the requirements of Gas Interlock systems, as required by GSIUR Gas Safety (Installation and Use) Regulations 1998.


All new kitchen installations must have a gas interlock installed in conjunction with a ventilation system, designed and manufactured to the specifications outlined in DW172 "Specification for Kitchen Ventilation Systems"

Any installation that contains a Type B appliance (eg combination oven) must have a gas interlock system installed.

Existing kitchen installations do not necessarily require a gas interlock system installing if the Atmospheric testing for CO2 indicates adequate ventilation. IGEM/UP/19 does recommend however that installation of a system would improve safety and therefore should be considered in the near future, along with ventilation system improvements in line with DW172.

" Design and application of interlock devices and associated systems used with gas appliance installations in commercial catering establishments"

"Hvca (heating and ventilation contractors association) specification for kitchen ventilation systems"

IGEM/UP/19

gas interlock systems in commercial catering establishments

"Our Engineers have the experience of installing, maintaining and servicing over 100 gas interlock systems"

DW172

After completing a CO2 atmospheric test, your catering engineer may recommend the installation of a Gas Interlock system in accordance with GSUIR and IGEM/UP/19. There are some different additions and/or functions that may be recommended.

  • Gas Proving - Tests the system for gas leaks each time it is powered up.
  • Remote Emergency Stop - A remote switch to isolate the gas in the event of an emergency. Similar to fire break glass but yellow. Usually fitted on emergency exit route.
  • Fan Pressure differential switch - Used to prove the air flow in the ducting is moving.
  • Fan Current Monitor - Used to prove the fan motor is running.
  • Co2 Monitor - Monitors CO2 level in atmosphere and shuts Interlock off if levels become dangerous. 



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If you would like any further information about gas interlock panels or carbon dioxide testing in commercial catering, please do not hesitate to contact us.