applianceincludes any fittings or services, other than a hot water storage vessel which does not incorporate a vent pipe to the atmosphere, which form part of the space heating or hot water system served by the combustion appliance;
installationincludes any work which is necessary to ensure that the building work complies with the applicable requirements contained in Schedule 1. 3 Where this regulation applies, the local authority is authorised to accept, as evidence that the requirements of regulations 4 and 7 have been satisfied, a certificate to that effect by the person carrying out the building work. 4 Where this regulation applies, the person carrying out the building work shall, not more than 10 days after that work has been completed, give the local authority— a notice to that effect;