Hot water boilers; solar heating installations; central heating installations

Apparatus to absorb solar radiation to heat fluids including extruded strips of plastic materials having longitudinal ducts through which the fluid passes to be heated, apparatus to heat swimming pools by absorbing solar radiation.

Solar collectors for heating; solar energy powered heating installations; solar heating apparatus; solar heating installations; solar heating panels; solar panels for use in heating; boilers (other than parts of machines); boilers being parts of central heating installations; boilers for central heating installations; boilers for hot water supply installations; boilers for use in heating systems; burners for boilers; burners for the combustion of gas in boiler units; burners for the combustion of oil in boiler units; central heating boilers; domestic boilers; electric boilers; electric central heating boiler systems; gas boilers; gas boilers (other than parts of machines); gas boilers for central heating; gas boilers for the heating of swimming pools; gas boilers for water heating; gas fired boilers; gas fired boilers for producing domestic hot water; heating boilers; hot water boilers; oil fired boilers; steam boilers (other than parts of machines); steam boilers for steam generating (other than parts of machines); water boilers