Page 13R-5086
Termination Clearances (Figure 19)
Termination clearance for buildings with combustible and noncombustible exteriors.
Vertical Sidewall Installations
Important! Minimum clearance between vent pipes and combustible materials is one inch (1") (25mm) on, bottom and sides and (2") (51mm) on top.
Important! When vent termination exits through foundation less than 20" below siding outcrop, the vent pipe must flush up with the siding. SD985
termination cap must also be used.
Imformation on Various Venting Routes and Components
Important: It is always best to locate the appliance in such a way that minimizes the number of offsets and horizontal vent length.
Since it is very important that the venting system maintain its balance between the combustion air intake and the flue gas exhaust, certain limitations
as to vent configurations apply and must be strictly adhered to.
The graph showing the relationship between vertical and horizontal side wall venting will help to determine the various vent lengths allowable.
The horizontal vent run refers to the total length of vent pipe from the vent elbow of the appliance to the face of the outer wall.
Figure 19