ÖNORM EN 461

This European Standard defines requirements and test methods concerning, in particular, the construction, safety as well as classification and marking of non-domestic flueless space heaters (including greenhouse heaters and diffusive catalytic combustion heaters), having a nominal heat input not exceeding 10 kW (Hs) burning 3rd family gases at nominal operating pressure not exceeding 50 mbar, referred to in the body of the text as appliances. It covers the following types of appliance: a) fixed heaters; b) portable or mobile heaters including those that incorporate a compartment for a transportable refillable liquefied petroleum gas cylinder; c) heaters intended for use in non domestic areas; d) heaters intended solely for outdoor use. NOTE 1 LPG appliances having a nominal heat input not exceeding 4,2 kW and intended for use in domestic premises are covered by EN 449. NOTE 2 Overhead radiant heater appliances are covered by EN 416-1. There are no specific thermal efficiency requirements appropriate to these types of appliances as: all the heat produced by the combustion process is released into the space to be heated; the requirements with regard to the combustion performance, which is a safety matter, ensure the effective burning of the fuel gas. This standard does not apply to appliances which incorporate a fan for either the assistance of combustion or the circulation of convected air. Neither does it cover appliances incorporating full sequence automatic controls. This standard does not apply to appliances for heating buildings used for animals rearing (see EN 12669). Requirements for appliances given in this standard assume that the supply of gas will be controlled by a pressure regulator giving an outlet pressure as indicated in Table A.1. Requirements for controls, given herein, relate to controls fitted as part of, or supplied with, particular appliances; they do no (...abbreviate (...abbreviated)