BS PD CEN/TR 1749:2009 European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
This document (CEN/TR 1749:2009) has been prepared by Technical Committee CEN/TC SFG_U “Sector
Forum Gas Utilisation”, the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes CEN/TR 1749:2005.
This technical report has been prepared under the aegis of the Sector Forum Gas Utilisation committee to
provide guidance to CEN Technical Committees who are preparing European Standards for appliances
burning combustible gases.
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 gas appliances
that are intended to be installed within buildings. It does not apply to outdoor appliances. Nevertheless, it is
recognised that this appliance classification scheme could be utilised in other circumstances. For example, in
the case of :
a) Appliances capable of utilising heating oil or kerosene, and
b) Gas appliances intended for installation in a partially protected location external to a building.
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 1749:2009 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)