59SP6A: Installation, Start-up, Operating, Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
38
A13305
Fig. 41 – Combustion Air and Vent Pipe Termination for Direct Vent (2-Pipe) System
A05091
Fig. 42 – Vent Pipe Termination for Non-Direct Vent and Ventilated Combustion Air System
Table 12 – Vent Termination Kit for Direct Vent (2-pipe) Systems
Vent and Combustion
Air Pipe Diameters
Approved Two-Pipe Termination Fittings
Allowable Concentric
Vent Kit
1 1/2-in. (38 mm)
2-in. (51 mm)
2 1/2-in. (64 mm)
3-in. (76-mm)
4-in. (102 mm)
1 1/2-in. (38 mm)
No
Yes
No
No
No
2-in. (51 mm)
2-in. (51 mm)
No
Yes
No
No
No
2-in. (51 mm)
2 1/2-in. (64 mm)
No
No
No
Yes
No
2-in. (51 mm)
3-in. (76 mm)
3-in. (76-mm)
No
No
No
Yes
No
3-in. (76 mm)
4-in. (102 mm)
No
No
No
Yes
Yes
3-in. (76 mm)
¾ in. (222mm) for 3 in. (76mm)
12 in. (305mm) min. separation
between bottom of combustion
air and bottom of vent (Typ.)
¾ in. (172mm) for 2 in. (51mm)
Abandoned masonry
used as raceway
(per code)
12 in. (305 mm) min. from
overhang or roof
Maintain 12 in. (305mm)
minimum clearance
above highest anticipated
snow level or grade
whichever is greater.
Side wall termination
with 2 elbows (preferred)
12 in. min. (305 mm)from
overhang or roof
Maintain 12 in. (305mm)
minimum clearance
above highest anticipated
snow level or grade
whichever is greater
6 in. (152mm) minimum clearance
between wall and end of vent pipe.
10 in. (254mm) maximum pipe length
Sidewall Termination
with Straight Pipe (preferred)
Roof Termination (Preferred)
Vent
Maintain 12 in
.
minimum clearance
above highest anticipated
snow level maximum of
24 in. (610mm) above roof
.
90
°
(305mm)
