47
FV42
85-03-01068
Using 45° Elbows
Two 45° elbows may be used in place of one 90
°
elbow. On 45
°
runs, one foot of diagonal pipe is equal to 8 ½”
horizontal run and 8 ½” vertical run. Two 45° elbows may be connected directly to the vent starter adapter
on this fireplace to create an offset to provide the required clearances to combustible framing or sheathing
materials.
Two 45° elbows may be connected directly to the top of this fireplace to create a horizontal offset. 32’
maximum horizontal run allowed with this offset configuration only if the first vertical section connected
directly to the last 45° elbow is 4’ to 12’ long. For maximum allowable horizontal distances with the 45°
offsets, see the Master Venting Configuration Chart.
Note:
Each horizontally positioned 45° elbow reduces the maximum horizontal distance by 1½'.
Support:
Horizontal runs of pipe will require one vent support for every 3’ of pipe.
f i r e - p a r t s . c o m
