BS 5546 gives the requirements for the selection, installation, inspection, commissioning and maintenance of gas-powered hot-water supply systems. This includes water heaters with a rated power of more than 70 kW, based on net calorific value. The standard also applies to water-heating devices using 1st, 2nd or 3rd family gases that supply hot water for domestic purposes – in either domestic or commercial dwellings. BS 5546 covers current hot-water supply systems with a CE mark, as well as previously used appliances without this marking.
BS 5546 first looks at competence, before explaining what should be taken into account when selecting equipment during the pre-installation phase. The standard then focuses on the installation and location of water-heating systems and concludes with key points on post-installation.
BS 5546 replaces BS 5546:2000+Amendment 1:2005 which is now withdrawn.
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