Napoleon GS60N Instructions D'installation Et D'opération page 16

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3.6 DEFINITIONS
For the following symbols used in the venting calculations and examples are:
EN
> - 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
3.7 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°
W415-0788 / F / 10.21.13
INCHES MILLIMETERS
0.5 12.7
6.0 152.4
11.0 279.4
16.0 406.4
32.0 812.8
14.1
15.1A