Installation Guide

507277-03C Page 23 of 53mrcool.com
Details of Intake and Exhaust Piping
Terminations for Direct Vent Installations
NOTE: In Direct Vent installations, combustion air is taken
NOTE:
Table 10.
Capacity
Termination Pipe
*045 and *070
2” (51 mm), 2-1/2”
(64 mm), 3” (76 mm)
1-1/2” (38 mm)
*090
2” (51 mm)
110 3” (76 mm)
NOTE:
Figure 29. Direct Vent Roof Termination Kit
(15F75 or 44J41)
UNCONDITIONED
ATTIC SPACE
SIZE PER EXHAUST PIPE
TERMINATION SIZE
REDUCTION TABLE
3” (76MM) MIN.
12” (305MM) ABOVE
AVERAGE SNOW
ACCUMULATION
3” (76MM) OR
2” (51MM) PVC
PROVIDE SUPPORT
FOR INTAKE AND
EXHAUST LINES
8” (203MM) MIN
Inches (MM)
1/2” (13MM) FOAM
INSULATION IN
UNCONDITIONED
SPACE
Figure 30. Flush Mount Side Wall Termination
2" EXTENSION
FOR 2" PVC PIPE
1" EXTENSION
FOR 3" PVC PIPE
1−1/2" ACCELERATOR
(all −45, −070 and −090 units)
FURNACE
EXHAUST
PIPE
FURNACE
INTAKE PIPE
4’’
GLUEEXHAUST
ENDFLUSHINTO
TERMINATION
FLAT SIDE
51W11