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Old 09-03-2012, 02:42 PM   #1
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Open or not open, that is the question

So after coast to coast travels I have a question as to whether or not your suppose to travel with windows or roof vents open. I've seen both. Side windows opened or cracked, fantastic fan vents open etc. I've always thought to keep all sealed for the possibility of damage. Thoughts, experience ?
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Old 09-03-2012, 02:46 PM   #2
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I keep the windows closed tight. I closed the rooftop vents also but a few weeks ago while on the road I looked back and saw the forward vent open. We had neglected to close it. It was open for several hours of highway speed travel so I guess they were sturdy enough to handle it. I've been re-thinking my philosophy now and think that it's OK to travel with them open if you wish to allow ventilation while traveling.

Still not sure on this though.
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Old 09-03-2012, 02:52 PM   #3
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I used to travel with my roof vent open with a Maxxair cover in my old SOB 100% of the time.

With my AS, the airflow over the trailer seems to draw in dust and exhaust fumes, so I travel with them closed.

Windows always closed tight.....open is a good way to lose them.

Experiment with your vents. If you don't have Maxxairs (or similar), I wouldn't keep them open more than an inch or two to reduce beffeting of the cover.
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Old 09-03-2012, 02:54 PM   #4
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I leave roof vents open in hot weather. I have Max Aire covers over the vents which help protect from rain and also wind damage to the vent covers. Have never had a problem. Cross my fingers.
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Old 09-03-2012, 03:58 PM   #5
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I have MaxAirs on the 77 and 89. I think I could leave the vents open, but the vacuum would likely draw in road dust through the cracks around doors and windows, as well as underneath the trailer. The 62 does not have MaxAirs and I would not want to break the vent covers or lifters by traveling with them open.
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Old 09-03-2012, 03:58 PM   #6
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Quote:
Originally Posted by RoadHungry View Post
So after coast to coast travels I have a question as to whether or not your suppose to travel with windows or roof vents open. I've seen both. Side windows opened or cracked, fantastic fan vents open etc. I've always thought to keep all sealed for the possibility of damage. Thoughts, experience ?
All windows on a travel trailer, must be closed when on the road.

You can, open the rear side ONLY of the vents, when traveling.

That creates a suction and helps keep the trailer cool, as long as it's in motion.

Opening the front side of a vent, will usually lead to it being ripped off by the wind. They are not designed to have a positive air pressure against the bottom side of them.

Also, having the back side within reason opened when traveling in a rain, will not result in water leaks, since the air is flowing "out" of the trailer, instead of in.

Andy
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Old 09-03-2012, 04:13 PM   #7
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I have no roof vents, only front and side opening windows. I don't think I would intentionally travel with them open. Too many things to go wrong.
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Old 09-03-2012, 04:31 PM   #8
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We close and lock the windows.

We'll often leave the roof vents open, and I know Fantastic Vent at least says it's fine to do so - they're normally mounted so the lid isn't catching the wind as you drive. (Ours have those extra covers (MaxxAir and the like) on them, so I don't worry at all.)

As noted, though, this can draw in dust and dirt - we were at a rally at an airfield earlier this year, and we got a LOT of dust inside the camper from the dirt driveway on the way in. We hadn't really had a problem like this before, but surely at least some dirt is being pulled into the camper.
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Old 09-03-2012, 04:40 PM   #9
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We forgot to lock/latch a side window. It's easy to do. It flew off, smashed in the freeway. We were lucky it didn't hit anyone or cause an accident.
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Old 09-03-2012, 05:04 PM   #10
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Thank's for the thoughts. I'll just keep mine sealed and say heck with the heat. I don't need anything flying off or in the alumbum!
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Old 09-03-2012, 05:36 PM   #11
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I keep the windows closed. I keep the bathroom vent open unless it is really a rainy day. I keep the front vent that is under a maxi cover open in hot weather. I keep the FF closed.
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Old 09-03-2012, 05:53 PM   #12
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We too have had a window fly off. The dealer had not adjusted the latches, so the forward latch on a side window was loose—this enabled the window to flex too much and it disintegrated. It is auto safety glass, so it crumbles.

Fantastic Fan (now called Vent) says the standard doors can be left open while traveling. I asked someone at FF if they can come off in rare cases and he didn't really answer, but said they are warranteed. The problem is if they come off, you have to seal the hole until you can get a replacement. That's not a chance I like. I think the chance of losing one would increase in a strong tail wind, thunderstorm downdrafts, dust devils and other weather extremes that can come up suddenly. The cover over the OEM assembly FF sells decreases the chance of losing the door substantially.

If you have the fan on exhaust, it is possible to pull in road dirt and dust through cracks—windows that don't fit perfectly, spaces around the various doors and the A/C. If it is raining, the negative air pressure in the trailer may also pull in water through spaces including pinholes in the sealant. If one fan is intake and one exhaust, it may balance the air pressure.

Gene
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Old 09-03-2012, 06:03 PM   #13
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I have accidentally left vents open with no ill effects. However, I intend to always close them because the air above highways is pretty dirty and I don't want that grime in the trailer. No one is in the trailer, so I don't care if its hot. Yes the air in the open roof vent is going out, but it is getting replaced by dirty air sneaking in all kinds of cracks. Almost always when we stop, the inside of the trailer is cooler than the outside.

Ken
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Old 09-03-2012, 06:26 PM   #14
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Apparently Ken only travels in winter. If it is hot outside, our trailer is usually hotter than the outside. Medications don't like heat and some dry foods don't either, but I'm still not opening the vents.

A flow through ventilation system like cars and truck have would be best—a filter would solve the dirt problem.

Gene
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