04
Fuel
09
Apparatus and instruments for conducting, switching,
transforming, accumulating, regulating or controlling
electricity
11
Air-conditioning apparatus; heating apparatus; drying
installations; ventilation [air-conditioning] installations
and apparatus; steam generating apparatus; boilers for use
in heating systems; boilers for use in heating
installations; boilers being parts of central heating
installations
37
Construction; building repair; installation of central
heating apparatus; installation of central heating systems;
installation of central heating; installation of drying
apparatus; installation of heat exhaust systems;
installation of boilers; installation of apparatus for
ventilating; installation of systems for heating;
installation of apparatus for heating; heating equipment
installation and repair; installation, repair and
maintenance of heating equipment; advisory services relating
to the installation of heating and cooling apparatus; boiler
cleaning and repair; building construction supervision;
burner maintenance and repair; construction information;
machinery installation, maintenance and repair; repair
information; maintenance and repair of solid fuel boilers
42
Scientific research; technological services and design
relating thereto; technological services and research
relating thereto; scientific and technological services;
scientific services and research relating thereto;
scientific services and design relating thereto