The 1990 directive on gas appliances obliges Member States to
- accept for any given design of boiler the efficiency rating on a scale with 2% intervals as determined by a notified laboratory from another Member State;
- ensure that boilers conform to the provisions of the future directive on minimum energy requirements currently being drafted by DG XVII.
To this end CEN has a mandate from the Commission to produce standards specifying the efficiency and emission requirements for central heating boilers and the methods to be used for demonstrating conformance to these requirements. Intercomparisons have shown that the proposed test methods lead to unacceptable differences between the results of different laboratories when determining both thermal efficiencies and NOx emission values. The purpose of the project is to determine the origin of these differences.
Started 1991, in progress.
Funding SchemeCSC - Cost-sharing contracts