Taking too long? Close loading screen.

Commercial Kitchen Gas Interlock Systems

G.I.S cut-off gas flow in the event of fan failures, now a mandatory requirement.

Commercial Kitchen Gas Interlock Systems

About G.I.S

Sensors are installed on either side of the ductwork to monitor air pressure. These sensors are connected to an air differential switch which is activated when the pressure difference changes.

An alternative option is to monitor the current used by the fan with a fan power sensor. A 230V G.I.S monitors the switch/sensor and should a fan failure occur the gas solenoid valve will be closed and cut-off the gas flow to appliances.

When is G.I.S a Mandatory Requirement?

  • On installation of a new extraction canopy
  • On installation of a new gas pipework run
  • On installation of a new cook line or layout
  • With any fitting of Category ‘B’ equipment such as ovens, deep fryers etc.
  • Including replacements to an existing layout

Useful Documents

G.I.S Overview

Gas Interlock System Requirements

Gas Interlock System Requirements

Click on the images to enlarge the diagrams

Control Panels

Commercial Kitchen Gas Interlock System Controller
GIS Controller
Commercial Kitchen Gas Interlock System Controller
GIS Controller

Cut-off Switch

Commercial Kitchen Gas Interlock System Emergency Cut-off
Cut Off Switch

Air Pressure Switch

Commercial Kitchen Gas Interlock System Air Pressure Switch
Air Pressure Switch
Includes 2 metres piping

Extension Kit

Commercial Kitchen Gas Interlock System Extension Kit
Extension Kit
Includes 2 metres piping
and 2 connectors

Solenoid Gas Valves

Solenoid Gas Valves Commercial Kitchen Gas Interlock System
Solenoid Gas Valves

SGV-240-1/2 (½")
SGV-240-3/4 (¾")
SGV-240-1 (1")
SGV-240-1-1/4 (1¼")
SGV-240-1-1/2 (1½")
SGV-240-2 (2")
SGV-240-2-1/2 (2½")
SGV-240-3 (3")

Interlock System Thermostats

Commercial Kitchen 3 Phase Gas Interlock System Thermostats
3 Phase Thermostats
Hot cupboards - +30-85°C
Hot water boilers - +30-110°C
Fryers - +110-190°C
Convection ovens / bratt pans - 60-260°C
Boiler top / ovens - 60-320°C

Gas Proving System

Commercial Kitchen Gas Proving System

Current gas regulations require that any kitchen fitted with gas appliances which do not have flame safety devices are advised to install a gas proving system to comply with Gas Safe Register best practice, making sure that the gas supply cannot be switched on if appliances or pipes are leaking. A Gas Proving System requires a G.I.S to operate.


Contact ACK Sales

Our team has experienced sales and technical staff available to guide you, from the first point of contact where we will evaluate the requirements, through the design, manufacture, installation and maintenance of a ventilation system.

Contact Us
01761 453666 - Bristol Head Office
Visits to our Bristol Head Office are welcome, please contact us to make an appointment.
© 2018 ACK reserves the right to change prices and specifications without notice.

Design & Planning

Commercial Kitchen Ventilation System Design Planning

Our team can provide all of the advice and assistance needed for design and planning stages.


Commercial Kitchen Ventilation System Canopy Ductwork Filter Manufacture

Manufacture of custom canopies and filter systems by our skilled engineers at the Bristol factory.


Commercial Kitchen Ventilation System Installation

Installation services for kitchen ventilation systems, parts and catering equipment of all kinds.


Commercial Kitchen Ventilation System Maintenance Cleaning HSE Assessments

A range of maintenance and cleaning services for canopies, fans, filters, ductwork and more.

Replacement Parts

Commercial Kitchen Ventilation Replacement Fans Filters Parts

We supply a wide range of fans, filters and other parts from our factory and showroom store.

Useful HVAC/HSE Documents

DW/172 HVCA Specification for Kitchen Ventilation Systems

The standard for kitchen ventilation design in the UK.
HSE Information Sheet No. 10

The guidance will assist caterers in assessing whether existing ventilation is adequate.
DEFRA Control of Odour and Noise From Commercial Kitchen Exhaust Systems

Guidance on the control of odour and noise for commercial kitchens.
Gas Safe Register Technical Bulletin 140

Technical information for Gas Safe registered businesses/engineers and commercial kitchen designers.
HSE CAIS 23 (Revision 2) – Gas Safety In Catering and Hospitality

Guidance on relevant aspects of safety in the use and maintenance of gas-fired equipment.

Guidance on the design and application of interlock devices and associated systems.
ESOS – Complying with the Energy Savings Opportunity Scheme

Information for organisations which qualify for an Energy Savings Opportunity Scheme audit.