BS PD CEN/TR 1749:2005 European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
It gives details of a general scheme for the classification of such appliances according to the method of
evacuating the products of combustion. It must be stressed that this scheme only concerns appliances that
are intended to be installed within buildings. It does not apply to outdoor appliances. This form of appliance
classification is widely used in the preparation of European Standards for gas appliances to identify the
requirements and methods of test that are applicable to the various methods of evacuating the products of
combustion. Appliances classified in this way are generally described as “types” and this description has
been retained for the purposes of this general scheme.
The main purpose of the scheme is to promote harmonization in the classification of appliance types. This
should ensure that there is a clear understanding of the various appliance types and will avoid confusion
arising from Technical Committees describing them in different ways. CEN Technical committees are
therefore requested to use this scheme in all circumstances in which it is appropriate. They should not
deviate from it unless there are sound technical reasons for so doing.
In the preparation of this scheme it was noted that there were methods of evacuating products of combustion
that were particular to a specific Technical Committee or to a particular gas appliance. These particular
methods have not been included in the present scheme because, as indicated above, the main purpose of the
scheme is to promote harmonization across Technical Committees.
However, it is intended that this scheme should be reviewed from time to time in order to consider its
extension to other, possibly new, methods of evacuating products of combustion. At that time, such specific
methods of evacuating products of combustion may be included at the request of the Technical Committees
concerned.
BS PD CEN/TR 1749:2005 history
2015BS PD CEN/TR 1749:2014 European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
2009BS PD CEN/TR 1749:2009 European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
2006BS PD CEN/TR 1749:2005 European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
2001BS PD CR 1749:2001 European scheme for the classification of gas appliances according to the method of evacuation of the products of combustion (Types)