Vermont Casting 7PDVS - Manual (Page 10)

DV Power Vent System
10 10003262
Venting Down:
A - Maximum 40FT of straight pipe.
B-Minimum 10FT of straight pipe for units up to 33,000BTU/h,
Minimum 15FT of straight pipe for units from 33,000BTU/h
to 40,000BTU/h.
C-Maximum 6FT of straight pipe.
D-Maximum 12FT down.
A = L
1
+L
2
+L
3
+L
4
+L
5
+L
6
B = L
1
+L
2
+L
3
+L
4
C = L
5
+L
6
D = L
1
+L
2
In the above example there are:
4 times 90 degrees elbows = 360 degrees
2 times 45 degrees elbows = 90 degreees
Total elbow degrees = 450 degrees
Installation is OK
L
6
L
5
L
2
L
4
L
3
L
1