BS EN 525:2009 pdf download – Non-domestic direct gas-fired forced convection air heaters for space heating not exceeding a net heat input of 300 kW

BS EN 525:2009 pdf download – Non-domestic direct gas-fired forced convection air heaters for space heating not exceeding a net heat input of 300 kW
4.2.1.2.1 Appliances designed for use on gases of the first and second families Category II 1a2H : Appliances capable of using gases of Group a of the first family and gases of Group H of the second family. The first family gases are used under the same conditions as for Category I 1a . The second family gases are used under the same conditions as for Category I 2H .
4.2.1.2.2 Appliances designed for use on gases of the second and third families
a) Category II 2H3B/P : Appliances capable of using gases of Group H of the second family and gases of the third family. The second family gases are used under the same conditions as for Category I 2H . The third family gases are used under the same conditions as for Category I 3B/P .
b) Category II 2H3+ : Appliances capable of using gases of Group H of the second family and gases of the third family. The second family gases are used under the same conditions as for Category I 2H . The third family gases are used under the same conditions as for Category I 3+ .
c) Category II 2H3P : Appliances capable of using gases of Group H of the second family and gases of Group P of the third family. The second family gases are used under the same conditions as for Category I 2H . The third family gases are used under the same conditions as for Category I 3P .
d) Category II 2L3B/P : Appliances capable of using gases of Group L of the second family and gases of the third family. The second family gases are used under the same conditions as for Category I 2L . The third family gases are used under the same conditions as for Category I 3B/P .
e) Category II 2L3P : Appliances capable of using gases of Group L of the second family and gases of Group P of the third family. The second family gases are used under the same conditions as for Category I 2L . The third family gases are used under the same conditions as for Category I 3P .
f) Category II 2E3B/P : Appliances capable of using gases of Group E of the second family and gases of the third family. The second family gases are used under the same conditions as for Category I 2E . The third family gases are used under the same conditions as for Category I 3B/P .
g) Category II 2E+3+ : Appliances capable of using gases of Group E of the second family and gases of the third family. The second family gases are used under the same conditions as for Category I 2E+ . The third family gases are used under the same conditions as for Category I 3+ .
h) Category II 2E+3P : Appliances capable of using gases of Group E of the second family and gases of Group P of the third family. The second family gases are used under the same conditions as for Category I 2E+ . The third family gases are used under the same conditions as for Category I 3P
4.2.1.3 Category III
Category III appliances are designed for use on the three families.
This category is not in general use.
Category III appliances admitted in certain countries are given in A.3.
4.2.2 Classification according to the mode of evacuation of the combustion products
Appliances are classified into several types according to the method of evacuation of the combustion products and admission of the combustion air.
This standard applies to:
a) Type A : An appliance not intended for connection to a flue or to a device for evacuating the products of combustion to the outside of the room in which the appliance is installed;