Use Of Elbows - Heatilator RAVE32-IFT-B Installation Manual

D. Use of Elbows
Diagonal runs have both vertical and horizontal vent as-
pects when calculating the effects. Use the rise for the
vertical aspect and the run for the horizontal aspect. See
Figure 4.6.
Two 45º elbows may be used in place of one 90º elbow.
On 45º runs, one foot of diagonal is equal to 8-1/2 inch
(216 mm) horizontal run and 8-1/2 inch (216 mm) vertical
run. A length of straight pipe is allowed between two 45º
elbows. See Figure 4.6.
Figure 4.7 shows the vertical and horizontal offsets for
SLP elbows.
VERTICAL
Effective Length
SLP
Pipe
Inches Millimeters
SLP4 4
SLP6 6
SLP12 12
SLP24 24
SLP36 36
SLP48 48 1219
SLP6A 3 to 6 76 to 152
SLP12A 3 to 12 76 to 305
Figure 4.6
Heatilator • RAVE32-IFT-B, RAVE36-IFT-B, RAVE42-IFT-B Installation Manual • 2619-983 Rev. U • 9/22
24
RUN
HORIZONTAL
Rise/Run
Inches Millimeters
102 2-3/4 70
152 4-1/4 108
305 8-1/2 216
610 17 432
914 25-1/2 648
34 864
2-1/8-4-1/4 54-108
2-1/8-8-1/2 54-216
X
X
Vent
Type
Inches Millimeters
SLP 5-1/4
X
Vent Type
SLP
Figure 4.7 Vertical and Horizontal Offset for DVP and SLP Elbows
Y
Y
Inches Millimeters
133 11-3/8 289
X
X
Inches Millimeters
11-1/4 286