EN 297:1994

EN 297:1994 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas-fired central heating boilers - Type B11 and B11BS boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW". This standard covers: This European Standard specifies the requirements and test methods for the construction, safety, fitness for purpose, rational use of energy, classification and marking of gas-fired central heating boilers, hereafter referred to as 'boilers'. This standard applies to type B11 and BB11BS boilers: - fitted with atmospheric burners; - that use gases corresponding to the three gas families and to the pressures stated in 4.1.4; - that have a nominal heat input not exceeding 70 kW (on net calorific value); - where the temperature of the water does not exceed 95 øC during normal operation; - where the maximum water-side operating pressure does not exceed 6 bar. This standard does not contain all the necessary requirements for: boilers: - intended to be installed in the open; - having multiple heating units with a single draught diverter; - with fan-assisted combustion; - of the condensing type; i- ntended to be connected to a common flue having mechanical extraction; - fitted with manual or automatic means of adjusting the air supply and/or adjusting the evacuation of the combustion products; - of the combination type (central heating and domestic hot water production); appliances: - combining the functions of an independent space heater and a hot water generator for central heating. This standard only covers type testing.

This European Standard specifies the requirements and test methods for the construction, safety, fitness for purpose, rational use of energy, classification and marking of gas-fired central heating boilers, hereafter referred to as 'boilers'. This standard applies to type B11 and BB11BS boilers: - fitted with atmospheric burners; - that use gases corresponding to the three gas families and to the pressures stated in 4.1.4; - that have a nominal heat input not exceeding 70 kW (on net calorific value); - where the temperature of the water does not exceed 95 øC during normal operation; - where the maximum water-side operating pressure does not exceed 6 bar. This standard does not contain all the necessary requirements for: boilers: - intended to be installed in the open; - having multiple heating units with a single draught diverter; - with fan-assisted combustion; - of the condensing type; i- ntended to be connected to a common flue having mechanical extraction; - fitted with manual or automatic means of adjusting the air supply and/or adjusting the evacuation of the combustion products; - of the combination type (central heating and domestic hot water production); appliances: - combining the functions of an independent space heater and a hot water generator for central heating. This standard only covers type testing.

EN 297:1994 is classified under the following ICS (International Classification for Standards) categories: 91.140.10 - Central heating systems. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 297:1994 has the following relationships with other standards: It is inter standard links to EN 15502-2-2:2014, EN 14459:2007, EN 297:1994/A6:2003, EN 297:1994/A5:1998, EN 297:1994/A3:1996, EN 297:1994/A4:2004, EN 297:1994/A2:1996, EN 297:1994/A2:1996/AC:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 297:1994 is associated with the following European legislation: EU Directives/Regulations: 2009/142/EC, 90/396/EEC; Standardization Mandates: M/BC/CEN/89/6. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

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