Intertek MVM97 Series Installation Instructions Manual page 22

V /F & C
ENT LUE OMBUSTION
If there is a difference between the vent and combustion air pipes, count
the pipe with the most fittings. Elbows and/or tees used in the
terminations must be included when determining the number of
elbows in the piping systems.
If the combustion air intake pipe is to be installed above a finished
ceiling or other area where dripping of condensate will be objec-
tionable, insulation of the combustion air pipe may be required.
Use 1/2" thick closed cell foam insulation such as Armaflex™ or
Insultube™ where required.
Vent & Combustion Air Intake Measurements for Standard
Horizontal Terminations (Dual Pipe)
Center to center = 10" min / 24" max.
Vertical separation: 0" - 24"
Vent termination from wall = 8" min / 12" max.
Combustion air intake from wall = 6" max.
Vent and intake clearance to ground
or anticipated snow level = 12" min.
AIR
INTAKE
SCREEN
(OPTIONAL)
Alternate Horizontal Vent Termination (Dual Pipe)
22
A P L & D
IR IPE ENGTHS IAMETERS
90°
ELBOWS
3" - 24"
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Figure 17
12" MIN.
Horizontal Termination (Single Pipe)
Above Highest Anticipated Snow Level
10"- 24"
6" MAX
4" MIN
90º OR 45°
ELBOW
SCREEN
(OPTIONAL)
Standard Horizontal Terminations (Dual Pipe)
AIR
INTAKE
SCREEN
(OPTIONAL)
Combustion Air Intake may also be snorkeled to obtain 12" min ground
clearance.
Alternate Vent Termination Above Anticipated Snow Level
(Dual Pipe)
VENT/FLUE TEE ( OPTIONAL)
or
45° ELBOW
TURNED DOWN or
90° ELBOW TURNED
DOWN
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Figure 15
12" MIN. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL
Figure 16
90°
ELBOWS
3"-24" BETWEEN PIPES
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Figure 18