This Approved Code of Practice and guidance gives practical advice on the Gas Safety (Installation and Use) Regulations (GSIUR). It is for anyone who may have a duty under the regulations, including those who install, service, maintain or repair gas appliances and other gas fittings. Every year about 14 people die from carbon monoxide poisoning caused by gas appliances and flues which have not been properly installed or maintained. Many others also suffer ill health. The Gas Safety (Installation and Use) Regulations 1998 as amended specifically deal with the installation, maintenance and use of gas appliances, fittings and flues in domestic and certain commercial premises.