Valor VENTANA 1200EAN Installation & Operating Instructions Manual page 18

How to Read the Venting Chart
The chart below applies to roof or wall termination
1. The total length of the vent pipe cannot exceed 40
feet (12.2 m).
2. The minimum vertical height with roof termination is
6 feet (1.83 m).
3. Any combination of rise and run can be used as
long as they are within the allowable limits shown
on the chart below.
4. A maximum of 4 x 90 degrees elbows—or
equivalent (2 x 45 degr. = 90 degr.)—can be used.
Venting Chart Venting Chart
4 x 90º ELBOWS 4 x 90º ELBOWS
MAXIMUM (or equivalent) MAXIMUM (or equivalent)
V2
H1
MINIMUM
VERTICAL
RISE: 2'
Min. 2'
before
elbow
V1
Example 1
V Value = V1 (6') + V2 (6') + V3 (2')= 14'
H Value = H1 (3') + H2 (3') = 6'
#2 Restrictor position required
18
Top of
horizontal
H2
pipe
3"
1"
Bottom & sides
of horizontal pipe
All around
1"
vertical
pipe
Max. 24" pipe if
Min. 12"
min. vertical rise
pipe
is used
Max. 6" pipe
if min. vertical
rise is used
45º elbow
directly on
fl ue collar
No Restrictor
Venting
.
5. Each 90 degrees elbow installed on the horizontal
plane is equivalent to a 3 feet horizontal pipe;
therefore, 3 feet must be subtracted from allowable
horizontal run. (45 degrees elbow is equivalent to
18 inches horizontal pipe.)
6. All horizontal pipe runs must be graded 1/4 inch per
foot upwards in the direction of the exhaust fl ow.
The fi nal pipe length, when terminating through the
wall may be graded downwards slightly to prevent
water migration.
7. Co-linear venting is not allowed.
8. A restrictor is required for many installations—see
next section. next section.
V3
40 40
38 38
36 36
34 34
#4 Restrictor #4 Restrictor
32 32
30 30
28 28
26 26
#3 Restrictor
24 24
22 22
20 20
18 18
Example 1
16 16
14 14
12 12
10 10
8 8
6 6
4 4
2
2
Allowable Vent
Confi gurations
NO INSTALLATION
#2 Restrictor
#1 Restrictor
NO INSTALLATION
4 6 8 10 12
HORIZONTAL RUN (ft)
14 16 18 20