L1 Reasonable provision shall be made for the conservation of fuel and power in buildings by— a limiting heat gains and losses— i through thermal elements and other parts of the building fabric; and ii from pipes, ducts and vessels used for space heating, space cooling and hot water services; b providing and commissioning energy efficient fixed building services with effective controls; and c providing to the owner sufficient information about the building, the fixed building services and their maintenance requirements so that the building can be operated in such a manner as to use no more fuel and power than is reasonable in the circumstances. ,, 1 Installation of a heat-producing gas appliance. ,A person, or an employee of a person, who is a member of a class of persons approved in accordance with regulation 3 of the Gas Safety (Installation and Use) Regulations 1998 ., 2 Installation of heating or hot water service system connected to a heat-producing gas appliance, or associated controls. ,A person registered by CORGI Services Limited in respect of that type of work., 3 Installation of— a an oil-fired combustion appliance which has a rated heat output of 100 kilowatts or less and which is installed in a building with no more than 3 storeys (excluding any basement) or in a dwelling; b oil storage tanks and the pipes connecting them to combustion appliances; or c heating and hot water service systems connected to an oil-fired combustion appliance. ,An individual registered by Oil Firing Technical Association Limited , NAPIT Certification Limited or Building Engineering Services Competence Accreditation Limited in respect of that type of work., 4 Installation of— a a solid fuel burning combustion appliance which has a rated heat output of 50 kilowatts or less which is installed in a building with no more than 3 storeys (excluding any basement); or b heating and hot water service systems connected to a solid fuel burning combustion appliance. ,A person registered by HETAS Limited , NAPIT Certification Limited or Building Engineering Services Competence Accreditation Limited in respect of that type of work., 5 Installation of a heating or hot water service system, or associated controls, in a dwelling. ,A person registered by Building Engineering Services Competence Accreditation Limited in respect of that type of work., 6 Installation of a heating, hot water service, mechanical ventilation or air conditioning system, or associated controls, in a building other than a dwelling. ,A person registered by Building Engineering Services Competence Accreditation Limited in respect of that type of work., 7 Installation of an air conditioning or ventilation system in an existing dwelling, which does not involve work on systems shared with other dwellings. ,A person registered by CORGI Services Limited or NAPIT Certification Limited in respect of that type of work., 8 Installation of a commercial kitchen ventilation system which does not involve work on systems shared with parts of the building occupied separately. ,A person registered by CORGI Services Limited in respect of that type of work., 9 Installation of a lighting system or electric heating system, or associated electrical controls. ,A person registered by The Electrical Contractors Association Limited in respect of that type of work., 10 Installation of fixed low or extra-low voltage electrical installations. ,A person registered by BRE Certification Limited , British Standards Institution , ELECSA Limited , NICEIC Group Limited or NAPIT Certification Limited in respect of that type of work., 11 Installation of fixed low or extra-low voltage electrical installations as a necessary adjunct to or arising out of other work being carried out by the registered person. ,A person registered by CORGI Services Limited, ELECSA Limited, NAPIT Certification Limited, NICEIC Group Limited or Oil Firing Technical Association Limited in respect of that type of electrical work., 12 Installation, as a replacement, of a window, rooflight, roof window or door (being a door which together with its frame has more than 50 per cent of its internal face area glazed) in an existing building. ,A person registered under the Fenestration Self-Assessment Scheme by Fensa Ltd , or by CERTASS Limited or the British Standards Institution in respect of that type of work., 13 Installation of a sanitary convenience, washing facility or bathroom in a dwelling, which does not involve work on shared or underground drainage. ,A person registered by CORGI Services Limited or NAPIT Certification Limited in respect of that type of work., 14 — 1 Subject to paragraph (2), any building work, other than the provision of a masonry chimney, which is necessary to ensure that any appliance, service or fitting which is installed and which is described in the preceding entries in column 1 above, complies with the applicable requirements contained in Schedule 1. 2 Paragraph (1) does not apply to— a building work which is necessary to ensure that a heat-producing gas appliance complies with the applicable requirements contained in Schedule 1 unless the appliance— i has a rated heat output of 100 kilowatts or less; and ii is installed in a building with no more than 3 storeys (excluding any basement), or in a dwelling; or b the provision of a masonry chimney. ,The person who installs the appliance, service or fitting to which the building work relates and who is described in the corresponding entry in column 2 above.,