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05-02-2012, 03:27 PM
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#1
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Junior Member
Join Date: Oct 2011
Location: Indiana
Posts: 12
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Roof vent opening during trailing
We have a Passport 250BH. We close the roof vent above the bed, and during trailering...on the Interstate, we find it open when we pull over at a stop. As you would expect the air flow going over the top would keep it close...why does it open? I wonder if it could be the air pressure created by passing semi trucks...somehow creating a sucking pressure pulling it up? Any ideas as to why opens? How to keep it shut?
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05-02-2012, 03:48 PM
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#2
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Senior Member
Join Date: Nov 2011
Location: SoCal
Posts: 1,739
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There could be some pressure gathering inside the trailer as you motor along.
I have the Maxxair vent covers on both vents so I leave mine open all the time except while I’m camping and need to limit hot/cold air from outside.
http://www.maxxair.com/
__________________
-Scott, DW, DG, DB, and DD
2011 Passport 2590BH
2009 Ford F150 SuperCrew F X4 5.4L w/Max Tow
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05-02-2012, 04:43 PM
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#3
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Senior Member
Join Date: Mar 2011
Posts: 211
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Instead of worrying about why it comes open, just install a Maxxair vent cover and leave it open all the time. That's what we do.
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05-02-2012, 05:53 PM
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#4
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Senior Member
Join Date: Mar 2012
Location: South Texas
Posts: 343
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X2 with Maxx Air
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Sandy & Ann
2019 Alpine 3401RS
2011 Ford F350 Diesel
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05-02-2012, 06:16 PM
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#5
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Senior Member
Join Date: Mar 2011
Location: Colorado Mountains
Posts: 422
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No open Maxxair vent on ours when traveling, only when stopped. Found it creates a slight vacuum inside TT that draws in dirt, and if raining draws in water around door bottom. With vent closed, never get a drop of water even in typhoons (almost anyway), and inside stays much cleaner per wife.
__________________
Chuck
Wonderful Wife
Australian Shepherd
2010 Ford Expedition TV
2010 Outback 230RS Toybox, 5390# UVW, 6800# Loaded
Not yet camped in Hawaii, 2 Canada Provinces, & 2 Territories
I can't be lost because I don't care where this lovely road is going
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05-02-2012, 07:01 PM
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#6
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Senior Member
Join Date: Jan 2012
Location: Carlsbad, Ca
Posts: 176
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Wow Chuck that is interesting. Have always left them open with the maxi vents. Gonna keep a closer watch on that when traveling. Now while stopped never an issue. I love this forum...learn something new everyday.
Sent from my iPhone using Tapatalk
__________________
Mingo
Sprinter 299rls
Chevy 2500HD Crewcab
Go Padres!!
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05-02-2012, 07:16 PM
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#7
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Senior Member
Join Date: May 2010
Location: Rochester, NY
Posts: 1,605
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I leave all 3 of mine with Maxair covers cracked open 24/7, 365 towing or not. I have no issues with water or dust.
Steve
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05-03-2012, 04:07 AM
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#8
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Junior Member
Join Date: Apr 2012
Location: Hampton, VA
Posts: 19
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Quick side question.....do the Maxxair vents limit light coming into the trailer? My TT is dark enough already....I don't want to make it worse. My vents let in some significant light....it'd be a shame to eliminate that.
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05-03-2012, 04:58 AM
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#9
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Senior Member
Join Date: Sep 2011
Location: Wisconsin
Posts: 105
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First thing I do is install Maxair covers on all my vents. Always keep them cracked open during storage & traveling.
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05-03-2012, 05:15 AM
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#10
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Member
Join Date: Nov 2010
Location: Virginia
Posts: 36
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The invention of MaxAir vents ranks right up there with the invention of slice bread.
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2006 GMC Yukon XL
2010 Keystone Springdale 266RLSSR
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05-03-2012, 07:48 AM
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#11
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Senior Member
Join Date: Jan 2012
Location: Central San Joaguin Valley, CA
Posts: 2,117
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Quote:
Originally Posted by joindy
We have a Passport 250BH. We close the roof vent above the bed, and during trailering...on the Interstate, we find it open when we pull over at a stop. As you would expect the air flow going over the top would keep it close...why does it open? I wonder if it could be the air pressure created by passing semi trucks...somehow creating a sucking pressure pulling it up? Any ideas as to why opens? How to keep it shut?
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We found our bedroom roof vent open on one occasion - it was only partially open - I think there is enough slack in the mechanism that, if it is not closed really tightly, it can rattle or bounce open - we now put a little extra torque on the nob (not to the point of damaging it) and have had no further problems
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Jack & Marty
2018 Laredo 298 SRL
2011 F-250 SB Crew Cab 4x4 6.7L
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05-03-2012, 07:50 AM
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#12
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Senior Member
Join Date: Apr 2011
Location: Arrey,
Posts: 2,368
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Howdy All;
X2 what jsmith948 said...
hankaye
__________________
Striving for a less complicated life since 1949 ...
Home: 2008 Cougar 278 RKS
T.V.: 2004 F-250 4X4, Level III BulletProofed , Detroit Tru-Track Differential (915A550)
Dog: 2006 Border Collie (Rascal) aka Maximum fur dispersal unit. (08/04/2006 - 12/16/2017) RIP.
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05-03-2012, 10:02 AM
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#13
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Senior Member
Join Date: Aug 2011
Location: WESTERN,CT
Posts: 2,095
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yep maxx air will fix that issue! but why is it opening... well it is haped like a wing and the low pressure is on top so 2 things one is it has a weak mech that keeps it down or you are going very very fast!
__________________
BARNEY AND CHRISTINE
2010 MONTANA 3750FL
2005 DODGE 3500 DUALLY TD
2 RESCUE PUPS: SUSITNA AND CRYSTAL. RIP ALYESKA!
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05-03-2012, 01:39 PM
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#14
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Senior Member
Join Date: Dec 2011
Location: Dayton
Posts: 175
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Quote:
Originally Posted by BigSur
.....do the Maxxair vents limit light coming into the trailer?
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I've got the white covers on mine...I haven't noticed that they cut down on light anymore than the white lids. I usually leave my vents open under the Maxxair covers unless it looks like we're going to see blowing precipitation. I also leave them open/cracked when trailering, again unless it's raining.
Sent from my iPad using Tapatalk HD
__________________
J. B. Smith
Dayton, OH
2012 Keystone Cougar 331MKS
2018 RAM 3500 Laramie 6.7L DRW
B&W Companion
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05-03-2012, 02:21 PM
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#15
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Junior Member
Join Date: Apr 2012
Location: Hampton, VA
Posts: 19
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Quote:
Originally Posted by jbsmith
.......... I usually leave my vents open under the Maxxair covers unless it looks like we're going to see blowing precipitation. I also leave them open/cracked when trailering, again unless it's raining.
Sent from my iPad using Tapatalk HD
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Even when you're running A/C and Heat??????
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05-03-2012, 02:28 PM
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#16
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Senior Member
Join Date: Nov 2011
Location: SoCal
Posts: 1,739
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I leave ours cracked open just to let moisture escape. If shut, we wake up with wet windows.
__________________
-Scott, DW, DG, DB, and DD
2011 Passport 2590BH
2009 Ford F150 SuperCrew F X4 5.4L w/Max Tow
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05-03-2012, 03:43 PM
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#17
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Senior Member
Join Date: Dec 2011
Location: Dayton
Posts: 175
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Quote:
Originally Posted by BigSur
Even when you're running A/C and Heat??????
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Ok...with some exceptions.
__________________
J. B. Smith
Dayton, OH
2012 Keystone Cougar 331MKS
2018 RAM 3500 Laramie 6.7L DRW
B&W Companion
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05-03-2012, 06:06 PM
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#18
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Senior Member
Join Date: Mar 2012
Posts: 150
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Quote:
Originally Posted by jsmith948
We found our bedroom roof vent open on one occasion - it was only partially open - I think there is enough slack in the mechanism that, if it is not closed really tightly, it can rattle or bounce open - we now put a little extra torque on the nob (not to the point of damaging it) and have had no further problems
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What he said. Had the same issue in my popup
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05-04-2012, 04:07 AM
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#19
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Junior Member
Join Date: Apr 2012
Location: Hampton, VA
Posts: 19
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Quote:
Originally Posted by jbsmith
Ok...with some exceptions.
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Gotcha. Was just curious if maybe you keep them open still for condensation control. I need to get the covers. I have 2 vents on the TT. Would be nice to keep them open, especially when our 100 degree heat shows up.
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05-04-2012, 03:32 PM
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#20
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Senior Member
Join Date: Dec 2011
Location: Dayton
Posts: 175
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Quote:
Originally Posted by BigSur
Was just curious if maybe you keep them open still for condensation control.
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Yep...I usually keep them closed when the AC is on, but they're always open when cooking and showering or if we start to build up moisture on the windows. I usually leave the one in the bath open when the heat is on. For extended camping trips, we use a small dehumidifier for extra moisture control.
Sent from my iPad using Tapatalk HD
__________________
J. B. Smith
Dayton, OH
2012 Keystone Cougar 331MKS
2018 RAM 3500 Laramie 6.7L DRW
B&W Companion
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