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Old 11-23-2015, 11:18 AM   #15
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yeah, and wrong symbol for carbon monoxide

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Originally Posted by Protagonist View Post
Perhaps you are forgetting that the stove burns propane inside where it can make carbon monoxide in the trailer. And it's why one shouldn't use the stove for a heat source.
I didn't word that right. at all. Is what comes out of the ducts, oxygen depleted?
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Old 11-23-2015, 11:25 AM   #16
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On my, admittedly older model AS, there is a wire mesh covered opening that is about 1' square under the refrigerator. That alone provides plenty of air flow but just cracking the roof vents open a bit ensures a continuous air flow in the mid-section of the trailer where we sleep. The first thing I did when I brought the trailer up to Colorado to begin using it again was install a CO2 detector in addition to a smoke detector. Neither of these items were included on trailers built in the 60's.

After being frozen nearly to death one night last January due to our inverter dying in Las Vegas, NM and the furnace only running as long as there was battery power I have now installed a quick-connect for a catalytic heater back up. Catalytic heaters of course require a free flow of air for oxygen but do not require electricity to run. Figuring out how to ensure oxygen flow for the catalytic heater led me to figure out that there is plenty of air flow. And to Cameront's point, the trailers are far from air tight even when closed up
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Old 11-23-2015, 12:05 PM   #17
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Originally Posted by mandolindave View Post
I didn't word that right. at all. Is what comes out of the ducts, oxygen depleted?
What comes out of the furnace ducts— or AC ducts for that matter— is the same air that was inside the trailer. So if the air isn't oxygen-depleted before being heated or cooled, it's not oxygen-depleted after, either.

A lot of factors go into air quality. Temperature, of course. Oxygen levels. Carbon dioxide levels. Carbon monoxide levels. Humidity. Odors. Allergens.

You've already got a lot of opinions regarding air circulation in your trailer. You'll undoubtedly get a lot more. But I stand by my assertion that you need forced ventilation if you want the air in your trailer to be comfortable. For small trailers, the bathroom exhaust fan and a cracked-open window is enough. For larger trailers, a roof vent open (at least partially) and the vent fan running on its lowest setting with a cracked-open window to let in fresh air is enough. Less than that and the air will eventually become stuffy, stinky, and/or wet.

I haven't crunched the numbers for every size of trailer, but as a former mechanical engineer who designed HVAC systems (among other things in a long and varied career) that is my engineering ballpark estimate.
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Old 11-23-2015, 08:26 PM   #18
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Presuming your carbon monoxide detector is operational, your chances of dying in your sleep in your Bambi are pretty slim, but you could easily wake up with a headache from two people exhaling CO2 all night. You also could have long term problems from the condensation that will accumulate from your personal water evaporation. Thus, it is important to have a slight airflow coming in and going out. My experience is that having the fresh air coming in near where we sleep and exiting at the opposite end of the compartment is most beneficial. Since during the day we spend more time in the other end of the trailer having the cool air coming in from the bed area limits the drafts we feel during the non-sleep times.
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Old 11-24-2015, 12:15 AM   #19
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This is really food for thought about Airstream trailer air/leak tightness.
I recently watched as the Airstream Service Center used their Sealtech machine to leak check my trailer. IIRC it over pressures the interior by 3 psi. I noticed there were 3 leaks with some bubbling, but, not large ones. There was also some air escaping from around the window rubber seals. A little more but not a great amount. After a 12,000 mile trip to Alaska in 2010, I had the same test done, and the results were similar plus a coupe of rivets missing. I have had the floor covering replaced with laminate wood. While it was up I could find no water damage. I have, in the past, resealed both wrap around windows, the curb side fixed window and replaced both skylights several times. Also, the roof has been resealed several times. I just had them reseal the roof for the third time. This time it took 8 tubes of Adseal which is a silicone product that is now used for roof sealing during production. That surprised me after all the talk about do not use any silicone on aluminum trailers. Also, this time I had the Service Center replace the skylights with Maxims from Maxim Industries, in Dallas,TX. I am pleased that this routine, even though it is probably overkill, I don't have or want any floor damaging leaks. Which brings me to the point that the trailers are pretty tight and need to be ventilated depending on the amount of use producing CO, CO2, and O2 depletion.
BTW, I also learned the factory no longer uses any tube sealant on the inside seams during production. They use seal tape between the aluminum sheets. Thats what they did when the battery boxes were removed (see earlier post).
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Old 11-24-2015, 04:03 AM   #20
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If the trailer was airtight you couldn't close the door,on my previous airstream I was washing it and sprayed water at the base of the a.c unit on the roof ,once I finished washing it and when inside I noticed water dripping from a.c unit inside so I remouved the cover and noticed there's a vent to outside built into the a.c ,not sure if this applies to all newer airstreams or if this is normal ,but made sense to me as I'm a retired auto tech and on cars they have at the back in the trunk area ( for sedans ) vents with flaps to allow air one way ( out) for the heater ,ventilation system ,air comes in at the front of the car windshield base area and exits the rear through the trunk area at the vent flaps ,also to allow your doors to close easier ,you can sometimes hear these flaps in operation when someone closes a door and you listen carefully at the rear of the car , there is usually two flaps one per side, I'm not saying you should keep all your windows closed and vents on your trailer I'm just saying that airstreams are not sealed 100%airtight. I would keep a window and a vent open a crack as what others have said for moisture and health.
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Old 11-24-2015, 12:47 PM   #21
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This is a great thread. Hopping on.
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