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Old 09-13-2013, 02:10 PM   #1
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Mach 8 AC- 13,500 or 15,000 for 25ft in HOT Climates

I have looked through the Mach 8 AC threads and plan to get the larger 15,000 btu unit. One dealer warned that would be an overkill in a 25' A/S.

However being in the deep south GA and Florida areas it gets very hot and think probably the 13,500 might be more marginal. Currently have a tired original 13,500 Coleman on it now that just won't give me more than ~ 15 deg differential inlet vs outlet of cold air.

There have been many posts on the exterior sound of the new Mach 8, and everyone says it cools great. But few with 25' - 27' have said what size they ordered .

Those with 31 footers order the 15,000. And obviously the Bambi sized coaches only need 13,500. If I was located in more temperate climate I'm sure 13,500 would be great.

What size is best for say Florida summers in a mid-size 1990 25 footer?

Also, I do know my Yamaha 2400 will start the current AC. Who has experience with the 13K or 15K AC on that size generator?

Steve in Savannah
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Old 09-13-2013, 02:15 PM   #2
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I don't really know about the Mach 8, but if it were the Dometic option which the new ones have, there's no argument; the 15,000. And that's not an overkill statement, either.

I've got the Yamaha 2400, and have been told it MIGHT start the 15,000, but that's all. Any other appliance added, and things go kaput real fast. Not a problem with the 13,500, but that was in my FC23, and things warmed up in the summer with that unit's output.

Good luck!
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Old 09-13-2013, 02:32 PM   #3
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Thanks Murrey for your quick reply!

That is exactly the info I am looking for. And I already knew that IF the Yamaha 2400 started the AC, that everything else including the converter and frig needed to be off or on gas.

I believe the Mach 8's come with a slow (or hard) start capacitor. Lewster said that if you changed it out it would void the 2 year warranty.

Steve
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Old 09-13-2013, 04:18 PM   #4
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Factory Installs of Air Cond.

Is Airstream installing the 13,500 as standard equipment recently, and if so do Southerners usually upgrade to the 15,000 btu units?

Steve
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Old 09-13-2013, 04:35 PM   #5
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The 15,000 on the 25 has become standard since, I believe, 2013.

Some upgrade to two (15,000 & 13,500) in the longer units.
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Old 09-13-2013, 07:12 PM   #6
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Mach 8 users

Murrey kindly shared his experience with Dometic. Thanks Murrey.

Do we have some Mach 8 users in the 25-28 foot range coach that would share experiences with 13,500 or 15,000 btu.
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Old 09-13-2013, 07:16 PM   #7
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I have a 15000 in a Bubble. I do not regret the choice. Of course. I use it in Texas. I also use a 15000 Carrier in another Bubble and one in a 22ft Cloud. Again, I don't regret it at all. Can you imagine using the AC and find out you "could'a, would'a, should'a" gone to the 15000 originally.
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