Continental Fireplaces CB30NTR, Installation And Operating Instructions Manual

Page: 16 / 84

16
EN
W415-1398 / C / 06.15.17
3.5 times the vertical
rise equal to
or greater than the
horizontal run
3 times the vertical
rise equal to or
greater than the
horizontal run
13.2A
3.6 DEFINITIONS
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
T
- total of both horizontal vent lengths (Hr) and offsets (Ho) in feet
H
R
- combined horizontal vent lengths in feet
H
O
- offset factor: .03 (total degrees of offset - 90°*) in feet V
T
- combined vertical vent
lengths in feet
14.1
3.7 ELBOW VENT LENGTH VALUES
FEETINCHES MILLIMETERS
1° 0.03 0.5 12.7
15° 0.45 6.0 152.4 30° 0.9 11.0
279.4 45° 1.35 16.0 406.4
90°* 2.7 32.0 812.8
* The fi rst 90° offset has a zero value and is shown in the formula as - 90°
15.1A