Non-Venturi Generator Exhaust Extender Ideas

[Squealers]

Folks,

I will be heading out on a trip to spring training in Florida here in several weeks.

I will be using my genset, and want to be able to safely use it overnight if necessary. I have a few concerns about the exhausting of genset. It dumps out right below my full wall slide.

I want to look at a way to extend it out past the slide, and don't think a venturi styled set-up will work since I would have to clear the extended slide before going up.

I have heard about some folks using a alternative such as an aluminum flexible conduit. If you have used this, or seen this or have ideas about this or anything which may work to get this exhaust out from under my coach, I would love to hear about it. Also wondering about how it attaches to the muffler, and how you would keep it from recoiling, etc.

Thanks for you insight, and hopefully I can get this rectified before I leave next month.

[Squealers]

Thanks for everyone taking the time to provide their solution. Let me reiterate, I WILL NOT, nor WOULD EVER use the recommended flexible conduit solution around anyone or any other RV, in a park or otherwise. I am not that stupid. Besides, I don't plan on using my genset ever while in a park as we are full hookup type people.

Also, I am not very handy. While there are those of you who can probably replicate your RV with a tool box and circular saw, I would end up cutting off my arm and endangering anyone within 3 miles. A man's gotta know his limitations. Thankfully, I can afford to pay to have things done. I know, shudder the thought, but people, I'm only telling you the truth!

I would get the Genturi in a nano second, but because of the full wall side clearance, I don't see it working out. That's when someone recommended the flexible conduit, FOR WHEN WE ARE PARKED AT A WM. I can put out a sign that says "HOT" for any wandering vagabonds.

If I could manufacture one of these home made systems, I'd do it in a nano second, but that's above my pay grade.

Thanks all! I appreciate your support and ideas.

[Bob_AnnaMarie]

Lantley,
Yep, I missed the type of coach. The venturi principle really works much easier on diesel rigs that have the generator up front so the exhaust bypasses the slide area by aligning with the driver's window. The generator exhaust on the Georgetown is mid-ship which makes venting the exhaust even more problematic. I am sure there is a safe way to handle the exhaust on one of these. I just don't know what it is.
Bob

[wa8yxm]

Lantley wrote:
They sell genuine Genturi extension pipe.
No need to invent anything.
With an item as mission critical as a gen turi why make up something that may or may not work.
Genturi extension pipe

I followed the link,, That is an extension or the Vertical Pipe, not for the horizontal pipe

the O/P needs the Horizontal pipe extended...

That said, Thanks, That is info I may well need soem day.

(I tend to store this kind of info for later use in my memory sponge, Occasionall a bit drips out when someoen needs it).

[Lantley]

I'm not opposed to those who are capable making their own Genturi. However that is not what this thread is about. The OP was concerned because he needed an extension to clear his slide.
Extension pipe is made by Genturi for that reason.
I agree the genuine Genturi's are quite pricey. But they work as designed. If you don't have the skills paying $100 beats suffocating or worse yet having someone in the next RV over suffocate.

I considered fabricating something however I was able to find a bonafide Genturi on on Craigslist at a reasonable price. It came with a nice storage bag and all the adapters I needed. The real thing is certainly nicer than what I would have made.

[Bob_AnnaMarie]

I'm with Ivylog. While the Gen Turi is a nice product, it is substantially overpriced.

Although, I also have to agree with those who think this may not be a DIY effort. If you do not understand the principal of the venturi effect and how to insure you are keeping that design intact, you should not build one of these yourself.

As far as heat burning the outside of the coach, the maker did not follow the venturi model of adding cool air to the exhaust in the vent. My DIY exhaust (after the right angle pipe) is never too hot to put your hand on it for an extended period of time.

And, while I have seen others use something as simple as a household dryer vent tube to channel the exhaust away from their coach, I cannot personally subscribe to any extended exhaust that does not rise above the roof line of the coach where it can be easily dissipated by normal air flow.

Just my thoughts.

[Ivylog]

"With an item as mission critical as a gen turi why make up something that may or may not work." The venturi effect is fairly simple and easy to duplicate and test. Using a IR temp gun and changing the distance from the generator's exhaust pipe I was able to get the temp of my $20 "mission critical" rig down to 118 degrees measured just above the elbow. As you can see after five years and probably 40 days of use, the paint on the down spout is not burnt, even in the elbow. I prefer to make $100/hour by spending $20 and an hour of my time instead of paying $120 for a Gen Turi.



Now the steel sweep is an entirely different story as you better give it 15 minutes to cool down before taking it off. If there is a strong wind I'll angle it into the wind to make up for it.

[Lantley]

They sell genuine Genturi extension pipe.
No need to invent anything.
With an item as mission critical as a gen turi why make up something that may or may not work.
Genturi extension pipe

[wa8yxm]

How I woudl do it...

First: If i ever look at a motor home with the generator exhausting under a slide I'm going to move on and look at another motor home, but that said , If I got stuck with one by accident

I'd get the Gen-turi (Genuine article) and carefully mount it

I would go to a muffler shop and get an extension line for the generator made up.. This would be the same size as the Genturi's own elbow, swedged so as to addept the elbow (aldo drilled for the lock pin) use the included adapters at the Generator end (and drill for the lock pin

Then put a 2nd pipe at least 2x the diamater (3x would be better) with lots of holes, this woudl be welded on to the smaller pipe using small bits of waste pipe so the two pipes are concentric (Look it up if you have to)

And I would still make sure the batteries in my CO detector were fresh.

[Johno02]

The Flex piece was designed for exhaust use, and was fairly cheap and off the shelf. Not so good if parked close to someone else, but works great otherwise, and just rolls up for storage.

[We_Cant_Wait]

If someone burned their paint using a home made exhaust stack the 1) they had it mounted way to close to the side of the unit, 2) they did not have a big enough air gap at the bottom to draw in cool air. There are a number of us that have made their own exhaust stacks with very good results.

[rockhillmanor]

All I will add is using anything metal it will get HOT. I've seen full body paint get burned by a do it your self exhaust stack. Not to mention anyone specially kids walking past your MH that might come in contact with the hot pipe.

I use the Gen-Turi. The pipe is NOT hot to the touch. The Gen-Turi also comes with adapter/instructions showing how to divert the stack to the left or right of the gen exhaust.

And if you use a flex tubing to run it on the ground away from your MH?

Been there done that and I almost died from someone doing this. Yes the exhaust is away from your RV but it runs under other people's RV's which is VERY dangerous. Many CG parks will not allow extensions on gens on the ground for just that reason.

[Ivylog]

I would make an exhaust out of alum gutter down spout similar to the one below. You would have to have a piece as long as your slideout before the elbow and then aprox 7' going up which will be enough to get the exhaust safely away. For those that doubt 7' going up is enough, I often just use this elbow to get the hot air going up and something about hot air rising takes care of the rest.


Most of the weight is supported by the suction cup and metal arm. Total cost less than $25 for alum gutter down spout, elbow, and suction cup.

[tommy_g]

I use mine a lot for the AC while overnighting. I have two CO alarms for just that.

[Squealers]

I would only use it while behind a Walmart with no one around me. This brings up a good question, who uses their genset overnight to say, run the AC while they sleep?

I never realized this was a not an option.

[2gypsies1]

Also make sure the generator isn't aimed at your neighbor.