22
Multiple Units Termination
When two or more direct vent units are vented near each other, each unit must be individually vented, but next unit
vent ternination must be at least 12 inches away from the first unit. Vent termination is important so as to avoid
recirculation of flue gases.
*
Concentric Multivent Termination
Horizontal Terminations
□
Vertical Terminations
□
*
Multiple unit Termination
Vertical Terminations
□
Horizontal Terminations
□
Vent
Combustion Air
12"
Min
Combustion Air
Vent
12"
Min
12
"Min
Combustion
Air
Vent
12"
Min
12"
Min
(1
8"
M
in
C
AN
AD
A)
Vent
Combustion Air
12"
Min
Combustion Air
Vent
12"
Min
12
"Min
Combustion
Air
Vent
12"
Min
12"
Min
(1
8"
M
in
C
AN
AD
A)
Combustion Air Termination
Vent Termination
12"
Mi
n
* Multiple unit Termination
1) Vertical Termination
2) Horizontal Termination
12
"M
in
A
bo
ve
G
ra
de
/
H
ig
he
st
A
nt
ic
ip
at
ed
S
no
w
L
ev
el
2) Horizontal Termination
M
in
1
2"
Combustion Air
Termination
12"
Min
12"
Min
Vent Termination
12
"M
in
A
bo
ve
G
ra
de
/
H
ig
he
st
A
nt
ic
ip
at
ed
S
no
w
L
ev
el
M
in
1
2"
Combustion Air
Termination
12"
Min
12"
Min
Vent Termination
12" M
in
Combustion Air Termination
Vent Termination
12"
Mi
n
* Multiple unit Termination
1) Vertical Termination
2) Horizontal Termination
12
"M
in
A
bo
ve
G
ra
de
/
H
ig
he
st
A
nt
ic
ip
at
ed
S
no
w
L
ev
el
2) Horizontal Termination
M
in
1
2"
Combustion Air
Termination
12"
Min
12"
Min
Vent Termination
12
"M
in
A
bo
ve
G
ra
de
/
H
ig
he
st
A
nt
ic
ip
at
ed
S
no
w
L
ev
el
M
in
1
2"
Combustion Air
Termination
12"
Min
12"
Min
Vent Termination
12" M
in
Combustion Air Termination
Vent Termination
12"
Mi
n
* Multiple unit Termination
1) Vertical Termination
2) Horizontal Termination
12
"M
in
A
bo
ve
G
ra
de
/
H
ig
he
st
A
nt
ic
ip
at
ed
S
no
w
L
ev
el
2) Horizontal Termination
M
in
1
2"
Combustion Air
Termination
12"
Min
12"
Min
Vent Termination
12
"M
in
A
bo
ve
G
ra
de
/
H
ig
he
st
A
nt
ic
ip
at
ed
S
no
w
L
ev
el
M
in
1
2"
Combustion Air
Termination
12"
Min
12"
Min
Vent Termination
12" M
in
The Grand Hall approved concentric kit is a unique
pipe-in-pipe venting system designed for termination.
Do not try to replicate or make your own. For more
information, please refer to
Concentric Vent Kit
section in the Operation manual.
WARNING
!
!