Whereas, moreover, these studies have led to the drafting of a code of practice indicating the procedures to be followed for the on-site performance testing of a liquid or gaseous fuel fired heat generator subject to inspection in connection with its installation;

Whereas it is consequently necessary for inspections of the generators in question to be carried out in compliance with the said code, which constitutes a minimum common basis throughout the Community; whereas the provisions of the code do not apply to solid-fuel heat generators;

Whereas it is appropriate that, in order to permit ready verification of compliance with the rules relating to an inspection carried out in connection with installation, provision be made for a data plate similar to that laid down for heat generators inspected at the stage of manufacture; whereas this plate may be replaced by the inspection report; whereas, in the event of non-compliance with the performance requirements or levels of energy loss, the inspection report will be sent to the competent administrative authority;

Whereas the measures adopted to implement this Directive should incorporate the measures adopted for the approximation of the laws of the Member States in the fields concerned by this Directive and should be directed towards facilitating the work on harmonization or standardization in progress or to be undertaken in these fields at Community level or internationally;

Whereas Directive 78/170/EEC should therefore be amended.