BS PD CR 1749:2001 European scheme for the classification of gas appliances according to the method of evacuation of the products of combustion (Types)
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)