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The guide explains how to choose chimney and flue systems that match the intended heating purpose and comply with relevant UK regulations and European/British standards. It covers chimney draw principles, approval requirements, major system types and materials, and constraints for stainless steel, flexible liners, and masonry liners. 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It is important to ensure that the chosen chimney and the heating system, as a whole, are suitable for the purpose intended and conform to the relevant regulations and standards.  \nThe BFCMA is the UK’s only Trade Association representing manufacturers and sole UK distributors of factory made chimney and flue products. It was established to promote the advantages of chimneys and encourage continued improvements in standards, efficiency and service.  \nContact details of BFCMA members are shown on the back page of this guide.  \nPublished by the  \nBritish Flue and Chimney Manufacturers Association.  \n2 Waltham Court, Milley Lane, Hare Hatch, Berks, RG10 9TH.  \nTel: 0118 940 3416 Fax: 0118 940 6258 Email: [info@feta.co.uk](info@feta.co.uk)  \n[www. bfcma. co. uk](www. bfcma. co. uk)  \nIntroduction  \nRegulations  \nThe construction and application of chimneys and fluesis covered by UK Building Regulations in conjunction with the relevant European and British Standards. Whilst these differ in emphasis, they all mandate the safe application of the chimney no matter where and how used. These Regulations and Standards dictate the minimum criteria which it is necessary to apply if the chimney or flue is to function safely and correctly.  \nBuilding control approval is necessary for building new chimneys and in some cases for relining old chimneys particularly if some alteration or change of the heating appliance occurs. The appropriate Regulations and Standards are listed later in this document.  \nChimney Principles  \nThe terms flue and chimney are often used interchangeably. The flue is the working part of the chimney, conveying the products of combustion safely to the atmosphere. The chimney includes the shaft within which the flue is housed. A flue works under negative pressure drawing the product of combustion from the appliance.  \nA successful “chimney draw” is dependent on the following principles:  \n- The difference in air pressure between the appliance and the top of the chimney. (created by the height of the chimney)  \n- The difference in temperature between the appliance’s exhaust gas and the outside temperature.  \n- The quality of insulation along the length of the chimney.  \n- The route of chimney. (The straighter and more vertical the chimney the better).  \nIt is essential to choose a flue diameter that matches the output from the appliance. An adequate air supply is also required for the appliance to operate safely and efficiently.  \nTypes of Chimney and Flue Systems  \nThe European Standard BS EN 1443: 2003 Chimneys – General Requirements, categorises chimneys and flues into three basic designations:  \nCustom Built Chimneys-Constructed on site using factory made flue liners.  \nSystem Chimneys-Prefabricated chimney systems. Manufactured in a factory and assembled on site. The key benefits of chimney systems lie in their off-site production and preformed insulation.  \nConnecting Flue Pipes-Pipe specifically designed to connect an appliance to the flue or chimney.  \nChimneys and flues are also available in a number of different materials – stainless steel, concrete, pumice, clay or ceramic and plastic. Concrete, pumice and clay or ceramic are collectively referred to as masonry chimneys. Plastic flues are only allowed to be used with lowtemperature condensing applications.  \nCare must be taken to check the designation of stainless steel chimney systems and flexible liners as a limited number are specifically designed for use with gas fired appliances. These must not be used with wood burning or multi fuel appliances. Clay and pumice chimney systems and liners are suitable for wood, multi fuel, oil and g","cbCaigJ0z0xwozlS","https://ap.wps.com/l/cbCaigJ0z0xwozlS","pdf",2061831,33,"English","# Introduction\n# Regulations\n# Chimney Principles\n# Types of Chimney and Flue Systems\n## Custom Built Chimneys\n## System Chimneys\n## Connecting Flue Pipes\n# Stainless Steel Flexible Liners\n## Single skin liners\n## Twin skin liners\n# Clay, Pumice and Concrete Liners","[{\"question\":\"What regulations and standards must chimney and flue installations follow?\",\"answer\":\"The guide states that chimney and flue construction and application are covered by UK Building Regulations together with relevant European and British Standards. These set minimum criteria to ensure safe and correct operation.\"},{\"question\":\"What principles determine a successful chimney draw?\",\"answer\":\"A successful chimney draw depends on the air pressure difference created by chimney height, the temperature difference between exhaust gases and outside temperature, insulation quality along the chimney, and having the straighter and more vertical chimney route possible.\"},{\"question\":\"Which flexible liners are suitable for wood and multi-fuel appliances?\",\"answer\":\"The guide says twin skin flexible liners should be used with wood and multi-fuel appliances. Single skin liners must never be used with wood or multi-fuel applications.\"}]","General Guidance on the Selection and Installation of Flues and Chimneys - BFCMA | PDF",1792810109,83]