Filter
Top Products
25613-0-0309Page 30
Termination clearance for buildings with combustible and noncombustible exteriors.
Vertical Sidewall Installations
Important! Minimum clearance between vent pipes and combustible materials is three (3") (76 mm) on top, and (1") (25 mm) on bottom
and sides.
Important! When vent termination exits through foundation less than 20" below siding outcrop, the vent pipe must extend outward so
that the horizontal vent terminal is located ush to, or beyond the outcrop siding.
Information on Various Venting Routes and Components
Important: It is always best to locate the replace 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 ue gas exhaust, certain
limitations as to vent congurations 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 ue collar of the replace to the face of the outer wall.
The maximum horizontal vent run is 20 feet (457 cm) when the vertical vent rise is 8 feet (244 cm). See Figure 17.
Venting terminals shall not be recessed into wall or siding.
Figure 46
RECESSED LOCATION
OUTSIDE CORNER
INSIDE CORNER
“A” = COMBUSTIBLE 9”(229mm)
= NONCOMBUSTIBLE 2” (51mm)
“F”=COMBUSTIBLE 6” (152mm)
= NONCOMBUSTIBLE 6” (152mm)
BALCONY
WITH PERPENDICULAR SIDE WALL
BALCONY
WITH NO SIDE WALL
“C”=CLEARANCE FROM CORNER
IN RECESSED LOCATION
COMBUSTIBLE 9” (229mm)
NONCOMBUSTIBLE 2” (51mm)
“D”=MINIMUM WIDTH FORBACK WALL
OFARECESSED LOCATION
COMBUSTIBLE 38” (965mm)
NONCOMBUSTIBLE 24” (610mm)
“E” = MAXIMUM DEPTHOF 48” (1219mm)
FOR RECESSED LOCATION
“G”=COMBUSTIBLE 9” (229mm)
= NONCOMBUSTIBLE 2” (51mm)
“H”=COMBUSTIBLE 18” (457mm)
= NONCOMBUSTIBLE 12” (305mm)
“I”=COMBUSTIBLE 18” (457mm)
= NONCOMBUSTIBLE 12” (305mm)
TERMINATION CLEARANCES