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Les langues disponibles
venting requirements
EN
2.5
defi nitions
For the following symbols used in the venting calculations and examples are:
> - greater than
> - equal to or greater than
< - less than
< - equal to or less than
H
- total of both horizontal vent lengths (Hr) and offsets (Ho) in feet
T
H
- combined horizontal vent lengths in feet
R
H
- offset factor: .03 (total degrees of offset - 90°*) in feet
O
V
- combined vertical vent lengths in feet
T
2.6
elbow vent length values
FEET
1°
0.03
15°
0.45
30°
0.9
45°
1.35
90°*
2.7
* The fi rst 90° offset has a zero value and is shown in the formula as - 90°
16
W415-1847 / A / 03.11.19
INCHES
MILLIMETERS
0.5
12.7
6.0
152.4
11.0
279.4
16.0
406.4
32.0
812.8
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