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Old 07-28-2016, 09:19 PM   #15
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Seems pretty poor if that's the lowest it will go.

As its a year old 25' is it ducted?
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Old 07-29-2016, 06:21 AM   #16
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These things are aluminum storage sheds on wheels, don't expect them to cool like your house. A gently blowing fan to circulate air, door kept closed as much as possible and minimal cooking producing as little heat and humidity as possible can keep it comfortable inside unless you are used to 72 degrees in your house. We are camping, not trying to duplicate our house.
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Old 07-29-2016, 06:31 AM   #17
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To build on Lewster's earlier comments, a delta-T of 18 degrees or so at the cold air outlet will not cool the trailer by the same amount since (especially in full sun) the trailer is continuing to absorb heat from the outside environment as you are trying to cool it. In bad outside temperature and humidity conditions, a single AC Airstream might only see a 15 degree drop in the inside temperature. And if you started with a "fully baked" Airstream it might actually take 12 hours or more to reach the full cooling potential.

If you want the ability to cool the inside of your trailer by more than 15 degrees in extreme conditions, you will need two ACs and even then, you'll have to be patient if you start out with an overheated trailer such as you get when towing all day in the sun on a 90 plus degree day.
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Old 07-29-2016, 06:43 AM   #18
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Quote:
Originally Posted by rocco52 View Post
I have a one year old 25FB with a single Dometic 15,000 BTU unit. In full sun I will get about 78 degrees interior on a 90 degree day with 40% Humidity and all awnings out. Is this good or bad?
I don't know whether it's good or bad but it's the best you'll do with a single A/C under those circumstances. These trailers pick up a great deal of heat in the sun, even with awnings out, even with blinds closed.
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Old 07-30-2016, 10:29 AM   #19
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We were wondering if a second AC would be overkill for our 25'. It has been soooo hot this summer. Any thoughts?
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Old 07-30-2016, 11:25 AM   #20
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Is the 40% humidity outside or inside cooled?

Something I learned living in FL and replacing 4 house ac systems AND having a friend in the business is that ACs like humid air. As they draw in the hot humid they pump out the dry cool. If the room is dry and hot then an AC unit is challenged and will be less efficient. If your trailer is in direct sun and heating up the heat radiation could overwhelm any ac unit in with a cool dry interior. Consider if the sun is heating along the side or an end. Shade the side if needed.
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