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Old 07-20-2019, 07:19 AM   #1
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Travel with bathroom vent fan on...

I am traveling in the Northeast this weekend... high temps expected.
I always leave the bathroom vent open during travel. With this heat I will also be leaving a small slide window open for air flow. (I donít have a second roof vent. Bathroom vent is at rear)
I was also considering leaving the bathroom vent fan turned on low to help pull the hot air out during travel.
Has anyone done this? Good/Bad/No difference????
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Old 07-20-2019, 07:29 AM   #2
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Had vents open and windows cracked, but never had a fan running.
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Old 07-20-2019, 07:48 AM   #3
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We've towed with the vents open and closed in hot weather. Didn't really see much difference. If it's hot outside it's gonna be hot inside until you get powered up and the AC cranking.


This photo is when we "landed" in ARK last July after a long day on the road with vents slightly open....
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Old 07-20-2019, 10:27 AM   #4
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We don't have A/C at home, so what we do during hot days is wait until the outside temperature equals the inside temperature and then close up the house... windows and doors shut, drapes drawn and turn on inside fans to circulate air. When evening comes and the temperature outside drops to equal the inside temperature, we open up all the doors and windows and turn on our whole house attic fan to draw in the cooler air and force the hotter air out of the house.

In your trailer, if you are going to be traveling during the heat of the day, running your fan is only going to be drawing in hot air. In my opinion, you are better off closing up everything tight and then airing out once you reach your destination.
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Old 07-20-2019, 01:07 PM   #5
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My concern with towing with a vent open is the lid up and in the wind. Those things seem pretty flimsy to me, and I'd be concerned that it might deform or the lid blow off. Of course, if you have a vent cover over it, like a MaxxAir, I see no problem.
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Old 07-20-2019, 01:28 PM   #6
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I found out real quick here in the deep south that during the day, temperatures can reach 100 degrees inside of our trailer while it is being towed with outside temps about the same. Opening a vent even with a fan would do no good. I mounted two Honda 2200 generators on beefed up rear bumper along with auxiliary fuel tank and now run my 15K Air Conditioner while I am towing. I can tow for 8 to 10 hours and burn around 3 gals. of gas between the two generators.
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Old 07-20-2019, 02:14 PM   #7
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or simply tow up north where it's not so hot.

(currently in Rapid City, SD)

Last time we had vents open, going through construction areas we sucked a bunch of dirt and dust into our RV. That won't ever happen again. We keep everything shut and deal with the heat once we get to the destination. It don't take long to air out the trailer and such once we are setup on AC.
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Old 07-20-2019, 02:35 PM   #8
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Get a vent cover like a MaxAir to protect the vent cover and leave the vent open. It will develop it's own suction to pull air through the TT.
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Old 07-20-2019, 03:11 PM   #9
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Quote:
Originally Posted by rockfordroo View Post
Get a vent cover like a MaxAir to protect the vent cover and leave the vent open. It will develop it's own suction to pull air through the TT.
And that air will include dust, carbon monoxide and vehicle exhaust particulates.
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Old 07-20-2019, 06:03 PM   #10
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Quote:
Originally Posted by rockfordroo View Post
Get a vent cover like a MaxAir to protect the vent cover and leave the vent open. It will develop it's own suction to pull air through the TT.
Quote:
Originally Posted by awellis3 View Post
And that air will include dust, carbon monoxide and vehicle exhaust particulates.
He may get this if he runs his fan or not. He wants ventilation; I'm just telling him he doesn't need to run the fan to get it.

If you want to tell him to bottle up his TT on the road, feel free. You don't need to rain on my parade to do that.
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Old 07-20-2019, 08:04 PM   #11
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or simply tow up north where it's not so hot.

(currently in Rapid City, SD)
That's only three degrees of latitude north of us in NE Ohio and it got to 97 today. The motorhome is parked in the driveway and it eventually got there as well in the late afternoon. We just keep it closed up and all blinds drawn.

Ray
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Old 07-20-2019, 08:21 PM   #12
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Forget the fan, and only leave the vent open if you have vent covers like Maxxair.

The lids alone are pretty flimsy in the constant wind going down the road.
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Old 07-21-2019, 06:57 AM   #13
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We do have vent covers.
I would never tow with a vent open without a cover as mentioned the lid is pretty flimsy on its own.

We used to tow with a vent open but wife decided it caused more road dust to filter inside than when it's closed so we now tow with the vents closed.
As I said earlier I didn't see much temp difference either way.
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Old 07-21-2019, 07:05 AM   #14
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X 3 on just open covered vents. My vents are only closed with ac on
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Old 07-21-2019, 09:31 AM   #15
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Quote:
Originally Posted by stormer View Post
or simply tow up north where it's not so hot.

(currently in Rapid City, SD)

Last time we had vents open, going through construction areas we sucked a bunch of dirt and dust into our RV. That won't ever happen again. We keep everything shut and deal with the heat once we get to the destination. It don't take long to air out the trailer and such once we are setup on AC.
Not sure we could tow that far North ???
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Old 07-21-2019, 10:25 AM   #16
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And that air will include dust, carbon monoxide and vehicle exhaust particulates.
Basically the air we breath everyday. But toss in...Pollen, mold, spores, bacteria...and a couple hundred other things. I get what you're saying.
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Old 07-21-2019, 06:12 PM   #17
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I believe that a closed up thing...(RV, home garage, etc.) stays a little cooler on a hot day, by not letting hot air get into it in the first place.


It's 100 degrees here this weekend, in New England. My garage (30' x 30') and back shed (24' x 34') are sealed up pretty good..no open doors or windows.


It's quite a bit cooler in these buildings than the outdoor temp. Very bearable.


Rich
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Old 07-21-2019, 08:43 PM   #18
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both our vents are open 24/7 unless we have the AC going.
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Old 07-21-2019, 08:59 PM   #19
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And that air will include dust, carbon monoxide and vehicle exhaust particulates.
I concur with this scenario, road dust and engine exhaust will find their way into the camper if a window is open, especially on the exhaust side of the vehicle. Close it up, travel then walk the dog while the unit is cooling off after arrival.
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Old 07-21-2019, 09:46 PM   #20
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Last time we had vents open, going through construction areas we sucked a bunch of dirt and dust into our RV. That won't ever happen again. We keep everything shut and deal with the heat once we get to the destination. It don't take long to air out the trailer and such once we are setup on AC.
We had the same experience driving on a bunch of gravel roads in Iowa. Everything in the trailer was coated with dust.
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