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Topic: Venting AquaHot diesel exhaust (Read 1214 times) previous topic - next topic

Venting AquaHot diesel exhaust

Is there a problem with using some type of ducting to vent the AH exhaust outside of an enclosed space?  What would be a maximum length?
Thanks,
Mike

Re: Venting AquaHot diesel exhaust

Reply #1 –
No

Re: Venting AquaHot diesel exhaust

Reply #2 –
Back when I was in the HVAC business I sold, installed, repaired, and maintained many oil fired boilers, which is what an AquaHot is.  Those boilers all had the flue (chimney/exhaust) pressure range (whether it be positive or negative) published in the documentation.  The burner will not run properly unless the pressure is in the required range. I am assuming Aquahot knows what that spec is and did not rely on trial and error. I have not looked for that particular spec, however, It is on my to do list. The pressure can be measured with a U-tube manometer. If I cannot find the spec, I intend to measure the pressure  and then attempt to run the exhaust into my existing vertical exhaust pipe. If the pressure does not change, I can use it to reroute the exhaust over the coach. If it does change, I will have to resize the pipe to bring the pressure back into spec.

You should be able to use the same method to size the pipe for your application.

TOM

Re: Venting AquaHot diesel exhaust

Reply #3 –
Our previous owner installed a Gen-Turi system that can hang on the side of our U320 when needed, and stores in a bag when not needed. It has always worked well for us. (We actually have two—the second one is for the generator. At times we use both and are thankful for them.)

Re: Venting AquaHot diesel exhaust

Reply #4 –
What I want to do is park my coach in my barn, and vent the AH exhaust to the outside, about a 15' run, using some sort of flexible ducting.
Mike

Re: Venting AquaHot diesel exhaust

Reply #5 –
I know nothing about the Gen-Turi system, but all 80% efficiency residential fuel oil furnaces or boilers are required to have a constant rise on the flue/ exhaust pipe of not less than 1/4" per foot, I would assume that any added pipe would have to have the same positive slope. Equally any flue pipe must terminate more than 4' from a window that can be opened to prevent CO poisoning.
Any flue pipe in an unheated area (outside) would need to be insulated (equivalent to a B-vent) pipe to maintain a good draw.
Pipe diameter should remain the same as the original sized pipe.

Re: Venting AquaHot diesel exhaust

Reply #6 –
The Aqua-Hot exhaust seems to be significantly hotter than the generator exhaust and so I would think it would take quite a pipe (and insulation) to handle it.
 

Re: Venting AquaHot diesel exhaust

Reply #7 –
Quote from: D.J. Osborn –
The Aqua-Hot exhaust seems to be significantly hotter than the generator exhaust and so I would think it would take quite a pipe (and insulation) to handle it.
Good point!
May need insulated pipe to protect the exterior wall and humans.
I don't think PCV is up to the task.

Tim