6
Transportable buildings or rooms of metal; Pipes and tubes of metal
7
Valves; Heat exchangers [parts of machines]; Gas operated power generators
9
Water meters; Heat regulating apparatus; Glow modulators; Heat regulating apparatus; Inverters for power supply; Electric control devices for energy management; Temperature measuring instruments; Temperature controlling apparatus; Temperature measuring apparatus for industrial use
11
Heating installations; Heat regenerators; Thermal incineration installations; Heat pumps for energy processing; Boiler pipes [tubes] for heating installations; Heat exchangers for central heating purposes; Heat exchangers, other than parts of machines; Ventilators for heat exchangers; Gas fired water heaters; Water supply installations; Water supply installations; Hot water boilers; Hot water apparatus; Hot water cylinders; Hot water installations; Cooling installations
37
Installation of central heating apparatus; Installation of central heating apparatus; Installation of boilers; Pipe installation services; Installation of water pipes
39
Water supply; Water distribution; Distribution of heat; Heat supplying [distribution]; Distribution of energy for heating and cooling buildings; Information and advisory services in relation to the distribution of energy
40
Energy production
42
Advisory services relating to the use of energy; Advisory services relating to energy efficiency