A.O. Smith SGS - 100 Installation & Service Manual page 29

is
3.10.2
Instruction manual SGS
Requirements for flue gas discharge materials
Warning
The installation should be carried out by an authorised installation engineer,
in compliance with general and local regulations
Depending on the approved installation types, there are several alternatives for
connecting the air supply and flue gas discharge.
The appliances are approved for installation types B23, C13, C33, C43, C53
and C63.
The figure and table give information about these appliance types. For an
explanation of the possibilities, please contact the manufacturer.
(1.3 "Regulations").
29