
Form I-UD-V-CV, PN195677R5, Page 3
H
L
Type B Double-Wall
Vent Connector and
Vertical Vent Pipe
Model
UDAP-CV
FIGURE 1A
H = Vertical Height of Double-Wall Vent
L = Maximum Horizontal Double-Wall Vent Connector Length
FIGURE 1A and TABLE 1A - Vent
Lengths for Model UDAP-CV with
a Category I Vent using all Type B
Double-Wall Vent Pipe
2.2 SECTION 1 -
Vent Diameter
and Length
TABLE 1A - Vent Lengths of Category I Vent for
Model UDAP-CV Using All Double-Wall Vent Pipe
Model
UDAP-CV
Size
Vent
Diameter
H L
inches mm ft M ft M
30
4 102
6 1.8 4 1.2
45, 60, 75
6 1.8 6 1.8
8 2.4 8 1.5
30
4 102
10 3.0 2 0.6
45 10 3.0 5 1.5
60, 75 10 3.0 10 3.0
30, 45
4 102
15 4.6 5 1.5
60, 75 15 4.6 15 4.6
30, 45
4 102
20 6.1 5 1.5
60, 75 20 6.1 20 6.1
100 5 127
6 1.8 6 1.8
8 2.4 8 2.4
10 3.0 10 3.0
15 4.6 15 4.6
20 6.1 20 6.1
30 9.1 30 9.1
FIGURE 1B and TABLE 1B - Vent Lengths for Model UDAP-CV 60, 75, or 100 with a
Category I Vent with a Single-Wall Vent Connector and a Type B Double-Wall Vertical Vent
Pipe
TABLE 1B - Vent Lengths of Category I Vent
with Single-Wall Connector to Double-Wall
Vent for Model UDAP-CV 60, 75, or 100
Model
UDAP-CV
Size
Vent
Diameter
H L
inches mm ft M ft M
60 4 102
6 1.8 2 0.6
8 2.4 2 0.6
10 3 2 0.6
15 4.6 2 0.6
20 6.1 2 0.6
75 4 102
6 1.8 2 0.6
8 2.4 4 1.2
10 3.0 4 1.2
15 4.6 5 1.5
20 6.1 5 1.5
100 5 127
6 1.8 4 1.2
8 2.4 4 1.2
10 3.0 5 1.5
15 4.6 5 1.5
20 6.1 5 1.5
H
L
Double-Wall
Vertical Vent Pipe
Single Wall
Vent Connector
Model
UDAP-CV
FIGURE 1B
H = Vertical Height of Double-Wall Vent
L = Maximum Horizontal Single-Wall
Vent Connector Length
Vent diameter for Sizes 30, 45 60, and 75 is 4 inches (102mm).
Vent diameter for Size 100 is 5 inches (127mm).
Vent length requirements vary depending on size of heater and the type of
pipe used in the vent connector. If using a double-wall vent connector, refer to
FIGURE 1A and comply with vent lengths in TABLE 1A. If using a single-wall
vent connector (Sizes 60, 75, 100 only), refer to FIGURE 1B and comply with
vent lengths in TABLE 1B.
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