Concentric venting vs separated venting

[67hotrod]

I'm looking at venting my garage heater vertically with B-vent and bringing in outside combustion air thru horizontal single wall pipe. I can't bring myself to pay more for the stainless concentric vent kit than I paid for the heater!!!!!
Has anyone done this? I know it might not look as fancy but it's just a pole barn

Thanks

 

[rlitman]

Done what? Brought in fresh air through a separate opening vs concentric? Sure. Just read the manufacturer's instructions. It'll cover both methods. Note that concentric gains you a LITTLE efficiency.

 

[sideways]

Just to add another question here....I too was about to order a heater and then noticed the vent kit (4") was almost the same price as the heater!! Was wondering what made it so special and realized...could it be stainless and concentric? Can I just get a regular 4" vent kit that would work on a ceiling hung garage heater....80K Big Maxx?

 

[67hotrod]

From what I've gathered so far. You can use inexpensive B vent and go vertical. My Beacon Morris instruction say you have to buy their overpriced concentric kit to go with outside combustion air. I don't think this is nesessary. I also found that you can use single wall for the intake. You don't have to go concentric. Heck, they even say you can use PVC for the intake. You just have to be willing to punch two holes in your building to do it. I don't know about the PVC for intake but definitely not using there concentric vent kit!

 

[Dragfluid]

You can't use B vent for the exhaust. Not code. Stainless only. It says so right in the instructions.

 

[CKS1955]

I bought the concentric venting for my Beacon Morris. It is not stainless steel. If you are a tin knocker you could easily make one.

The exhaust needs to be stainless steel as mentioned above.

Jay

 

[bigredmf]

I bought the concentric venting for my Beacon Morris. It is not stainless steel. If you are a tin knocker you could easily make one.

The exhaust needs to be stainless steel as mentioned above.

Jay

I'm pretty sure the SS exhaust is a newer code say within the past 5 years.

My Sterling instructions said bvent was ok 4 years ago

 

[CKS1955]

I'm pretty sure the SS exhaust is a newer code say within the past 5 years.

My Sterling instructions said bvent was ok 4 years ago

I am not certain when the new code requirements for the exhaust were put in place. My install occurred in the fall of 2014.

Jay

 

[Ironhorse74]

Are they calling it concentric? Not coaxial? In the direct vent fireplace business it used be called coaxial. We vent horizontally all the time. Aluminum liners with galvanized steel outers have been the standard for years. The only place I have ever seen stainless steel is in solid fuel applications.

 

[sands35]

Concentric vent:

https://www.amazon.com/dp/B003EV3AWW/?tag=atomicindus08-20

 

[Dragfluid]

You can look up the regs as easily as I can. And it will say right in the installation instructions that came with your furnace. Any of these hanging garage furnaces that have a positive exhaust pressure have to be Cat III stainless. NOT B-vent.

 

[thammel]

I installed my reznor udas with the stainless cat 3. Had to get it from z-vent and was not cheap! But at least I know I've got a great intake/exhaust system.

Tom

 

[sideways]

Sorry to be dense here...but, do you have to use stainless if you are venting vertically - regardless of whether you are using separated combustion or not? Or, is stainless only required if you are separating your air - vertically or horizontally? I was planning on venting my heater through the gable end of my pole barn but, I wanted to vent straight up through my shop ceiling and then 90 degree over and through the wall. I was thinking I could use the B vent while traveling vertically and then switch to stainless for the horizontal leg into the separator box and through the wall....maybe saving some $$ on the length of stainless I would need. Would this work yes/no?

 

[CKS1955]

Stainless steel regardless if horizontal or vertical.

Jay