Lbow Equivalent For Horizontal Vent Length; Ent Section Lengths - J. A. Roby loo RGR-25 Installation And Operation Manual

3.2.3.4. E

LBOW EQUIVALENT FOR HORIZONTAL VENT LENGTH

Note : The first elbow has a value of 0 in horizontal vent length. The above table is valid for the 2nd, 3rd,
1
and 4th elbows.
No vent section should slope downwards (from the fireplace to the exterior vent outlet).
3.2.3.5. V

ENT SECTION LENGTHS

Section lengths must be calculated as shown in the following picture:
37
Horizontal vent length
Elbow
equivalent (H
angle
in.
1º 0.4 0.033
15º 6
30º 12
45º 18
90º 36
CAUTION:
)
e
ft.
0.5
1
1.5
3
Figure 3.2.3.4.a