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Old 02-06-2011, 07:53 AM   #57
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Do Snorkles Really Help?

Originally Posted by loulong View Post
...Running it up the side (with a long ugly pipe) will give it a chance to be truly "dispersed" by the wind.

Here's a thought: which is more dangerous, the prospect of CO discharge below the coach, or leakage stemmed by adding extra length to the exhaust?

Do we have firm evidence/testing to assure us that routing exhaust all the way up to the roofline doesn't create a second lethal hazard?

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Old 02-06-2011, 08:00 AM   #58
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I use the light drainage pvc. I get it at Lowes. Because air is drawn in at the bottom the pipe does not get too hot.Mine did get soft while in Arizona in the sun.It has one end flared to make a coupling so I cut it in half for storage My generator is located in front with the exhaust directly below the mirror so a bungee cord around the mirror works. My cousin uses a suction cup on the side to hold his.

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Old 02-06-2011, 08:08 AM   #59
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RV neophyte The sweep elbow only enters the vertical stack a short distance.The space around the 1 1/2 entering the larger pipe produces a venturi drawing fresh air in to mix with the exhaust.The additional backpressure is minimal and unless the exhaust is in bad shape it shouldn't be a problem.Which would be better? 99% being directed up or 100% being directed down.The sweep will produce less backpressure than the sharp bend in the chrome sink piece and being a slip fit it probably leaks out under the coach.

Actually if you turned the chrome pipe up amd fabricated a chimney with spacers to sit over it when using the genny and turned it down to look pretty when not.
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Old 02-06-2011, 08:26 AM   #60
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Looks pretty, and do I see a little bit of dead grass in the picture ? I see another danger lurking in the shadows. In business for 30 years taught me to look beyond the scope of the problem. Out of respect to your neighbors and your well being, use the extended exhaust above the roof line. May not be the total solution to the problem, but its the best we have at the time.
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Old 02-06-2011, 02:56 PM   #61
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Let's beat up on people with aqua-hot for a while.

Wait...Their exhaust don't stink (or kill).

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Old 02-06-2011, 08:44 PM   #62
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Engines usually are not allowed to be run in doors for more than 8-10 secs depending, due to CO poisoning concerns..

In HVAC, you must run all exhaust from gas appliances (other than the 'high efficiency' ones) UP and at least 2 feet past any roof structure within 10 feet... for CO poisoning reasons. HE furnaces/heaters can be routed out the side in most states, but at least 4 feet from any opening (window/door) due to the better 'burn' on these. If you look at the flue of a standard water heater, you'll see that it is, in fact, a 'Genturi', commonly known as 'exhaust augmentation'. Used in this way, the hot exhaust rises in the pipe pulling fresh air in with it. The two mix, and when exited out the top, the CO will be diluted.

The CO detector mounted on the floor is ok..high or low in a room; It makes no difference where you put the detector but not because carbon monoxide and air have approximately the same density. Both are gases and as a result, diffusion alone and the entropy effect will take care of mixing them. Any convection currents and/or forced-air turbulence present will also enable the gases to mix and affect the detector.

It is popularly misconceived that light (low-density) gases will somehow float atop heavy (higher density) gases. Indeed, if the higher density gas was admitted low in the room, and done so in a manner that would not cause much mixing, it would take a while for the gases to become thoroughly mixed by the mechanisms mentioned above. Even so, they would eventually mix.

That said, since time to detection may be of the essence, and in circumstances where the contaminant gas (such as CO from a under floor generator) gets into the room through entry points more or less at floor level, where one puts the detector can become important.
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Old 02-07-2011, 09:29 AM   #63
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In all this discussion, no one seems to have considered the effect of the sun revolving around our (flat) earth. In my expert opinion, that has to make a difference.
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Old 02-07-2011, 06:10 PM   #64
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Don't be sorry John, I'm glad you offered the information and cheap alternative fix. I also appreciated everyone else and their views and opinions. That's what I love about IRV2, it always keeps me thinking. I'm normally a plug-in kinda guy and haven't used the gen much except underway. Every thing posted...keeps every body think'n....that's what we're about.
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Old 02-07-2011, 08:10 PM   #65
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WOW!!! This is a heated debate. I will tell you first hand what happened to us just 4 weeks ago. While traveling from NH to FL we had a mechanical break down in PA, we managed to get to a walmart parking lot, it was late on a friday night so we decided to turn on the gen-set and go to sleep and deal with the problem in the morning. At 2 am we were awoke to our two CO detector alarms, one in the rear bedroom and one in the front area, the one in the rear has a digital read out that was at 420 ppm OMG, we open the front door and got some fresh air then we went back in to unfreeze the rear windows, by the way it is -5 outside. My exhaust exits in front of the rear wheel parallel with the ground pointing to the rear of the coach, I figure that there was now wind to help disperse the fumes and somehow they made ther way into the coach. MAKE SURE THAT YOUR CARBON DIOXIDE TESTERS ARE WORKING PROPERLY BEFORE YOU USE YOUR GEN-SET, IT COULD SAVE YOUR LIFE
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Old 02-07-2011, 08:20 PM   #66
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WERCRUISING Make that your carbon monoxide detector.
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Old 02-08-2011, 12:22 AM   #67
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Another case for Mythbusters!
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Old 02-08-2011, 12:52 AM   #68
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Originally Posted by wildtoad View Post

Sorry I meant to ask why "John Day" has a handle of "Gary..."
John Day is a town in Eastern Oregon
I assume this is where Gary is from
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Old 02-08-2011, 10:16 AM   #69
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What about our rear furnace that exhaust at the wall and in my case next to the bedroom slide. I use the front furnace not the rear, and then the hot water heater on gas, it's at the other side of the bedroom slide.
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Old 02-08-2011, 11:23 AM   #70
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Well, the solution obviously has to be requiring a catalytic converter on every genset that totally converts CO to beer. Then we can change this to a drinking and driving thread.

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