International comfort products B Series Installation Instructions Manual page 41

INSTALLATION INSTRUCTIONS
Figure 47 Combustion Air and Vent Pipe Termination for Direct Vent (2−Pipe) System
¾
¾
Figure 48 Vent Pipe Termination for Non−Direct Vent and Ventilated Combustion Air System
440 01 4102 01
12 in. (305mm) min. separation
between bottom of combustion
air and bottom of vent (Typ.)
Roof Termination (Preferred)
Vent
Maintain 12 in (305mm) .
minimum clearance
above highest anticipated
snow level maximum of
24 in. (610mm) above roof .
Abandoned masonry
used as raceway
(per code)
12 in. (305 mm) min. from
overhang or roof
90°
Maintain 12 in. (305mm)
minimum clearance
above highest anticipated
snow level or grade
whichever is greater.
Side wall termination
with 2 elbows (preferred)
Specifications subject to change without notice.
Gas Furnace: N9MSB
12 in. min. (305 mm)from
overhang or roof
6 in. (152mm) minimum clearance
between wall and end of vent pipe.
10 in. (254mm) maximum pipe lengt h
Sidewall Termination
with Straight Pipe (preferred)
A13077
Maintain 12 in. (305mm)
minimum clearance
above highest anticipated
snow level or grade
whichever is greater
A05091
41