working on it wrote:My trailer is sealed tight also, with extremely tight fit around the doors (67-72 Chevy truck seals), and must be forced shut. The inside is sealed with paint, the exterior with poly and paint. All seams are sealed with PL adhesive. I have tight butterfly covers on the cabin vents, and the windows seem to shut very tightly. I experimented with the A/C and electrical system a while back, and found out, among other things, that the trailer is too well sealed. In a matter of just 10-15 minutes, with no external airflow or A/C running, the humidity inside would rise from comfortable to miserable (48% to 99%). I guess that there was a considerable CO2 build-up also. And that's with just one person in the 4x8. I guess that I must leave vent cracked open at all time to avoid this, since the little A/C has no "fresh air" feature.Parnold said :As far as air tight goes, my trailer is encased in polyester resin. The floor is encased in rubberized undercoat. All my doors and windows are factory rubber seals (I did not build a single one) so it is pretty darn airtight. You can definitely feel resistance when closing the door if the windows are closed.
Bogo wrote: ...any vent with reasonable air flow through it will do for getting rid of it.
OverTheTopCargoTrailer wrote:Here is a good story of a guy trapped 30 meters under water in a tug boat toilet for 60 hours
Inside a small air bubble
dguff wrote:OverTheTopCargoTrailer wrote:Here is a good story of a guy trapped 30 meters under water in a tug boat toilet for 60 hours
Inside a small air bubble
I wonder how many cubic feet of air were in his "bubble"? Larger, about the same, or smaller than your average teardrop?
working on it wrote:Bogo wrote: ...any vent with reasonable air flow through it will do for getting rid of it.
Worst case scenario time...dead-still air inside and out, 110vac power goes away, and since it was working before, the 12vdc fans aren't powered up. As high up as my vents are, couldn't that be an insufficient airflow situation? I guess that the two computer case fans, drawing less than .3 amps each, could be powered up anytime I was in the cabin, to create airflow, and even run 24/7 while in camp, without drawing down the battery (example: 48 hours in camp; .3 amps each x 2 fans x 48 hours = 28.8 amp hours). Roughly 52% of the rated capacity of the Optima Yellowtop. Or even better, just use one case fan. Even if 110vac is also being used to power the A/C unit, or the main fan? Advisable, or not needed? Just checked my facts: the case fans only draw .18 amps @ 12vdc (2350 rpm, 62.75 cfm each). Therefore 1 fan at .18 amps x 48 hours = 8.64 amp hours...a minor draw!. I think I answered my own question.
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