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Old 06-18-2015, 02:51 PM   #31
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Do these split units draw a lot more power than window units? For the price difference I can't see spending the extra money.
It's kinda complicated. The new inverter mini splits take standard 120VAC, convert it to 38VDC then convert it back to AC. They then control the cycles of the AC to control the compressor. Basically once they start they stay running, no hard compressor starts. Since they don't shut down, just slow down you don't get the cold,shut down,hot,start up cycle. Everything I've read say they use less energy. They are also much quieter than the roof shaker RV style or the wall shaker window style.
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Old 06-18-2015, 03:23 PM   #32
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They use about half what a roof unit does.
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Old 06-19-2015, 12:24 AM   #33
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I just did mini splits in my office. I have a 30 x 30 school building split into an office, a conference room, a classroom and another office. IT was big money and they do work but are really quirky. The big thing is the fans are very very very low power. If you try a mini split think about a fan or two to move air around.
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Old 06-19-2015, 06:11 AM   #34
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We had splits in our CHUs (Containerized Housing Units), battalion HQ, and pretty much everywhere in Iraq, and they'd turn the CHUs into an icebox; I don't remember what the BTUs were, but I think most of the compressors were Mitsubishi. Which wasn't bad, unless your remote was lost and KBR didn't have them and wouldn't replace it ("Go borrow the remote from someone with the same unit," they said).

A CHU, just for comparison, is a 20x8x8 shipping container styled as quarters, so a 40' bus should be no problem for them
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Old 07-05-2015, 08:38 AM   #35
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Hey somewhere long time since I've been on here. I found links for the Mitsubishi system where you can hook up a their ducted system instead of the wall mount. I was thinking of using that system if I ever get the money.
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Old 07-05-2015, 12:30 PM   #36
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The two big issues I ran into while researching:

1. Fitting the outdoor units on the bus. Most are a little tall to put under the skirt and too wide to put on the back without blocking the emergency exit.
2. Dealing with vibration. Lots of the cheaper ones seem to crack copper lines when put in trailers, a bus would be worse I think.

They are still the best path IMO to get a.c. and heat from a small genny or inverter.
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Old 07-05-2015, 08:07 PM   #37
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I would have gone with a Mitsubishi except for the unit's proportions and size. No way I could hang it anywhere on a shorty.

And the point about vibration is an important one when it comes to mounting ANY kind of household appliance. The must be isolated from vibration as much as possible. They were never engineered to go on a paint shaker and survive.
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Old 07-05-2015, 10:48 PM   #38
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Spoke too soon the mini split died the Chinese junk will cost more to fix than I paid for it because the compressor is out. The factory warranty wouldn't cover it because they said being mounted on a mobile application is what caused the failure. They clam that the compressor oil was " splashing" inside the compressor from the movement of the bus and cause the compressor to run dry of oil and therefore die. I say hog wash its a cheap Chinese junk. I have been mounting house units in buses for over 20 yrs. and have never had an issue. So I bought a 2 1/2 ton goodman Ac american made and the compressor is made in their factory and comes with a ten yr warranty . So I made a palinium for it and will have in finished in a couple days .
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Old 07-05-2015, 10:54 PM   #39
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Originally Posted by rvingoffgrid View Post
Spoke too soon the mini split died the Chinese junk will cost more to fix than I paid for it because the compressor is out. The factory warranty wouldn't cover it because they said being mounted on a mobile application is what caused the failure. They clam that the compressor oil was " splashing" inside the compressor from the movement of the bus and cause the compressor to run dry of oil and therefore die. I say hog wash its a cheap Chinese junk. I have been mounting house units in buses for over 20 yrs. and have never had an issue. So I bought a 2 1/2 ton goodman Ac american made and the compressor is made in their factory and comes with a ten yr warranty . So I made a palinium for it and will have in finished in a couple days .
at what point did they need to know that it was mounted on a bus/mobile?

either way, good info!
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Old 07-05-2015, 10:58 PM   #40
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I have heard of the LG split units being installed in boats with good result.
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