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portable a/c for 1 room versus using central a/c...?

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Old 08-06-12, 08:12 AM   #1
bagwell
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Default portable a/c for 1 room versus using central a/c...?

would a "portable ac unit" (see pic) be much cheaper to operate cooling my master bedroom at nite versus running my central ac?
only my wife and I so its the only room I need cooled at nite.

or would this be a ghetto solution? I mean I could make a nicer, more permanent install exhausting thru the wall rather than thru a window.

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Old 08-06-12, 08:17 AM   #2
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this is how hotel rooms do it already, each room has its own AC unit. Why cool the entire building when you only need to cool occupied rooms. I can see this saving money if you primary use a few rooms. We have one of these around 12000 BTU but they are a bit loud to me if you try to sleep in the same room. But I'm a light sleeper and I will wear earplugs.

Our AC goes down a few times a year and having a unit like this around is very handy. I also have a portable generator that can power this so in case of a sustained power outage or hurricane I will have A/C.
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Old 08-06-12, 09:10 AM   #3
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I use one of those occasionally when I'm at my parents house(no central A/C). The thing is too damn loud at night. During the day it never seems to get below 78 degrees, but i'm not sure what the BTUs on it are.
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Old 08-06-12, 09:44 AM   #4
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I have a window unit installed through the wall in the kitchen, primarily to take heat loads out of the room when cooking in the summertime. I also have two of our three bedrooms framed and wired with 220V for window units (only cutting through the exterior sheathing and siding, plus the interior sheathing and drywall is needed to install). Yes, it makes good sense, and will save a good deal of money - if you only need to cool one room and you size the unit appropriately for the job.

Don't buy one of the price-leader 4-5000 btu air conditioners without a thermostat. We used one on the boat for years after friends warned us about this. In a small space, even an undersized unit - depending on outside air temperature - can freeze your butt. If it can't shut off the compressor it can turn the space into a meat locker.

Although they are kinda pricey, I'd be tempted to look into one of the Mitsubishi "ductless" air conditioners. They are super efficient and move the noisy parts outside.

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Old 08-06-12, 09:45 AM   #5
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I have a window unit installed through the wall in the kitchen, primarily to take heat loads out of the room when cooking in the summertime. I also have two of our three bedrooms framed and wired with 220V for window units (only cutting through the exterior sheathing and siding, plus the interior sheathing and drywall is needed to install). Yes, it makes good sense, and will save a good deal of money - if you only need to cool one room and you size the unit appropriately for the job.

Don't buy one of the price-leader 4-5000 btu air conditioners without a thermostat. We used one on the boat for years after friends warned us about this. In a small space, even an undersized unit - depending on outside air temperature - can freeze your butt. If it can't shut off the compressor it can turn the space into a meat locker.

Although they are kinda pricey, I'd be tempted to look into one of the Mitsubishi "ductless" air conditioners. They are super efficient and move the noisy parts outside.



http://www.mitsubishielectric.com/bu/air/index.html
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Old 08-06-12, 10:52 AM   #6
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^^ +1 on mits units ... was at a client with one - works well and QUIET compared to alternartives.
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Old 08-06-12, 11:21 AM   #7
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Quote:
Originally Posted by Lil4X View Post
Although they are kinda pricey, I'd be tempted to look into one of the Mitsubishi "ductless" air conditioners. They are super efficient and move the noisy parts outside.
ductless yes but still have to get the outside and the inside unit together + condensation water drainage/etc.


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Old 08-06-12, 12:02 PM   #8
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^ True. We just installed 2 at work last winter in our downstairs room at work and those things are great but very pricey.
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