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Posted by udarrell on June 3, 2007, 3:53 pm
dk wrote:
>On Sun, 03 Jun 2007 09:16:15 -0700, andrew@ethnographer.com wrote:
>
>
>
>>I'm looking for a new window air-conditioner, and while price is
>>important, I'm more interested in something that is *quiet* and has a
>>high EER rating. I have heard that the new "scroll compressors" are
>>quieter and more efficient, but after some searching online, I can't
>>seem to find any window units that are marketed with that feature. In
>>fact, it's pretty hard to find anyone who's trying to push a high EER
>>as a feature. l'm in Philadelphia, and I only need about 6000btu unit
>>for a bedroom. Does anyone have any recommendation for a very quiet
>>unit that's energy efficient? Are the newer scroll compressors even
>>available on window units? Thanks, Andrew
>>
>>
>Same here.
>(Clipped ... )
>Meanwhile, I've found the local Sears store at the mall has an
>excellent choice of quiet high EER units. I have one of theirs in my
>master bedroom and I love it. It cycles on and off during the night
>but is quiet enough that it doesn't wake you. In fact, we sleep
>better with it doing its thing.
>
> And best part of my window unit is that it knocked over $100 a month
>off my summer electric bills. (Right-on dk, they save on utility costs!)
>
>
I had a message ready to send & somehow hit the wrong key & lost it!
A lot of Room A/Cs use Rotary screw type compressors which are somewhat
similar to scrolls.
A rotary screw compressor is a type of gas compressor which uses a
rotary type positive displacement mechanism.
The mechanism for gas compression utilizes either a single screw element
or two counter rotating intermeshed helical screw elements housed within
a specially shaped chamber. As the mechanism rotates, the meshing and
rotation of the two helical rotors produces a series of volume-reducing
cavities.
Gas is drawn in through an inlet port in the casing, captured in a
cavity, compressed as the cavity reduces in volume, and then discharged
through another port in the casing. Good Rotary compressors are okay.
I love my 6,000-btu/hr Whirlpool "Quiet Partner Series," that I bought
several years ago. Low price, little over $100 and 9.7 EER.
It appears to be a Rotary Compressor coupled with a three speed fan &
various Tricks I use to cool and dehumidify perfectly 3 rooms & a
hallway 900-sq.ft.
Remote controlled and it does everything perfectly for 900-sq.ft first
floor in 104-F Heat index here in SW WI.
See how that is accomplished:
http://www.udarrell.com/airconditioner_current_temperature_btuh_charting.html
- udarrell
--
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