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mathew stouffer
09-23-2010, 08:07 AM
Garage furnace with an induced draft vent. It is allowed to slope downward? Could not find any installation instructions. Place was built in 07

Nick Ostrowski
09-23-2010, 08:29 AM
I don't see those types of units around here.

Is that a condensate stain on the plate beneath the flue pipe?

John Arnold
09-23-2010, 08:34 AM
No way.
The Simpson Dura-Vent instructions I have say that any "horizontal" sections must slope upwards away from the appliance at least 1/4" per foot. I don't think it would say that if you were allowed to vent vertical sections down as shown.

Gunnar Alquist
09-23-2010, 08:46 AM
Induced draft is still considered natural draft and must be installed as such. As John said, needs correct slope.

Rod Butler
09-24-2010, 07:03 AM
Agreed as flat out wrong.:eek:

David Bell
09-24-2010, 07:09 AM
Also, clearance from venting to gas pipe not good, no sediment trap on gas line, clearance of unit to ceiling could be suspect.

Scott Craig
10-15-2010, 11:38 AM
Garage furnace with an induced draft vent. It is allowed to slope downward? Could not find any installation instructions. Place was built in 07

Must admit, I have never seen a set up like that! But really looks wrong. Don't think it should ever slope down!