ÖNORM EN 525

This European Standard specifies the requirernents and test methods for the safety of non-domastic direct gos-fired forceci convection oir heaters having fully autornatic control Systems, hereafter referred to as "appliances". This European Standard applies to appliances of type A, and type A, with heat input based on the net calorific value of 300 kW or less fitted with integral burners intended for use other than in residential dwellings. It also applies to appliances designed for outdoor installation. For indoor appliances 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: - appliances intended for use in residential dwellings; - portable or transportable forced convection appliances; - appliances fitted with gas boosters; - appliances fitted with airlgas ratio controts. - appliances which incorporate a rnain burner having more than one section under a common burner control, of which one or more sections may be extinguished whilst another section remains in operation. This European Standard is applicable to appliances which are intended to be type tested. NOTE: Requirements for appliances which are not type tested would need to be subject to further consideration.