16
3.6DEFINITIONS
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
HT - total of both horizontal vent lengths (Hr) and offsets (Ho) in feet HR - combined horizontal vent lengths in feet
HO - offset factor: .03 (total degrees of offset - 90°*) in feet VT - combined vertical vent lengths in feet
14.1
3.7ELBOW VENT LENGTH VALUES
| FEET | INCHES |
1° | 0.03 | 0.5 |
15° | 0.45 | 6.0 |
30° | 0.9 | 11.0 |
45° | 1.35 | 16.0 |
90°* | 2.7 | 32.0 |
* The first 90° offset has a zero value and is shown in the formula as - 90°
15.1
