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FV36 85-03-01014
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.
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