As from the 1st July 2015, there has been a change with regards to the classification of gas appliances & installations being carried out in domestic and non-domestic premises.


There are now two types of classifications that the gas engineer must use when carrying out any type of gas work (NOT TO CURRENT STANDARDS HAS BEEN REMOVED). These are as follows:

·         IMMEDIATELY DANGEROUS (ID) – This is a dangerous appliance/installation, which if left connected to a gas supply, is an immediate danger to life or property. Examples of this are combustion products entering the room and gas escapes.

·         AT RISK (AR) – Is a potentially dangerous appliance/installation where one or more faults exist and which as a result may in the future constitute a danger to life or property. An example of this is inadequate ventilation.


It is extremely important that when the gas engineer carries out his work, they must advise the client/customer what type of classification it falls under. They should note this down on their report and ensure a copy is given to them. Under no circumstances should their decision be changed whatsoever under any circumstances.


When a  gas engineer  feels a gas appliance/installation is going to cause an immediate danger, they must ensure the following sticker is clearly displayed in a prominent location:


If the appliance is deemed dangerous, the engineer must ensure that the gas supply is disconnected, capped, and electrically isolated so that responsibility has been omitted. 

When any  gas appliance  does not comply (Whether ID or AR), the engineer must issue a warning notice that must be signed by the client/customer with a copy left on site, one with the engineer and one held in the main office for audit requirements. 


Further advice on this topic can be obtained from the Health and Safety Officer, Graham Hodis CMIOSH.