BS EN 621:2009 PDF

1   Scope This European Standard specifies the requirements and test methods for the safety and efficiency of non-domestic gas-fired air heaters not exceeding a net heat input of 300 kW with (an) atmospheric burner(s) and without a fan to assist the transportation of combustion air and/or flue gases, hereafter referred to as "appliances". This European Standard applies to Type B 11 , B 41 , C 11 and C 31 appliances intended for use in other than single unit residential dwellings. Provision of the heated air may be by means of ducting or may be directly into the heated space. This standard does not apply to:

a) appliances intended for use in a single unit residential dwelling;

b) appliances of the condensing type;

c) appliances for outdoor installation;

d) dual purpose air conditioning appliances (heating and cooling);

e) appliances where the air is heated by an intermediate fluid;

f) appliances with forced draught burners;

g) appliances fitted with a manual or automat...