This European Standard specifies the requirements and test methods for the construction, safety, marking and rational use of energy of independent gas-fired convection heaters incorporating a fan to assist transportation of combustion air and/or flue gases of types B12, B13, B14, B22, B23, C12, C13, C32, C33, C42, C43, C52, C53, C62 and C63 not exeeding a nominal heat-input of 20 kW which are wall mounted, free-standing or built-in. This European standard is in addition applicable to live fuel effect appliances.