What venting to use for a Rinnai condensing tankless

Well I'm back after my injury. I was still able to answer everybody's questions while I was out. This video is being made to answer and show the most asked question I receive. what to use for the venting or is my tankless vented rite.
Rinnai requires two different venting options the concentric venting where you have a pipe within a pipe. One pipe is used for the exhaust and the outer pipe is used for the intake air. the second option is 3" pvc sch. 40( red lettering) two different pipes for the exhaust and the intake. That's the only options you have these two ways can be vented through a wall or a roof, nothing else. No B vent or brick chimney ( no exceptions) you will burn out the unit.
PLEASE READ AND FOLLOW RINNAI'S INSTALLATION INSTRUCTIONS THAT COME WITH THE UNIT.
I hope you enjoy this video.
If you have any questions please e mail me at [email protected].
Thanks Mike