Definitions; Elbow Vent Length Values - Napoleon B46NTR Installation And Operating Instructions Manual

16
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°
W415-1613 / B / 06.13.16
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