An amazing AC unit

 Haier has hit the market with an amazing little window AC unit.  It is 6000 BTU
(good for a small room) but draws less than 500 watts.  The advertised EER is
12.  I just measured mine with a KAW.  While nicely cooling the room that I am
sitting in right now, it is drawing 438 Watts, 3.66 Amp at .97 PF.  I can't
verify that it is really moving 6000 BTUs, but it quickly cools my study on the
hottest south Florida weather we have had so far this year.

To be fair, it is a high-end product and costs double what you would pay for a
less efficient model.  Depending on the hours you use it and what you pay for
power, it may never pay for itself.  On the other hand, if you are off-grid
perhaps now you can afford to be cool.  It is considerably larger and heavier
than comparable models, but I had no problem installing it myself.  For you
earth huggers, it has the newest, greenest, refrigerant (R-410A) .

Our plan is to use the study as a cool room in the dog days of summer and leave
our central AC off for most of the day.  We have been doing the same in our
bedroom at night for years now.  Now that we are retired folks (well, actually
my last day at work is next week) we have to figure out how to live on the
cheap!  There is no reason to cool this entire uninsulated 3/2 house just for us
two empty-nesters.

http://www.haieramerica.com/en/product/ESAD4066

Vaughn

--
Will poofread for food.

 

Sounds about right. The nameplate amperage/wattage draw is based
on the mumble mumble mumble spec, which has some specified
pretty high outdoor temperature. If the gradient between the
outside and the inside is lower, then the current draw will
be less as well,

(hmmm, EER of 12, 6,000 BTU -> 500 watts. SO 438 makes sense).

Oh, that 500 watts is also based on the higher fan speed,
so if you've cut that down, you're also drawing less.

(I had a GE SuperThrust 10,000 BTU unit 3 decades
ago with an EER of 11.something.)


One important concern is the starting current draw...





--
_____________________________________________________
Knowledge may be power, but communications is the key
             dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]

 

   True, I did not measure it at the hottest part of the day.  I expect that it
will be closer to the rated 500 watts in 90+ weather.


   The quoted power (438 Watts) was using high fan speed.  Fan speed makes
surprisingly little difference in measured power.  That seemed so counter to
what I expected, I rechecked  in the fan-only mode.  Only a few watts difference
beween speeds.


   Yes, there is probably no deal-changing new technology here, just larger
coils and a compresser & fan well matched to the job.  That said, I have never
before seen a small room unit with this kind of efficiency.


   ...which is something I have no way of measuring, except to tell you it
passes the "light flicker' test.  That is, my room lights don't flicker when the
compresser comes on.  I can't say the same about my bedroom unit.  My house has
#14 wire, so voltage drop is occasionally something that you can actually see.

Vaughn

 
| Haier has hit the market with an amazing little window AC unit.  It is 6000 BTU
| (good for a small room) but draws less than 500 watts.  The advertised EER is
| 12.  I just measured mine with a KAW.  While nicely cooling the room that I am
| sitting in right now, it is drawing 438 Watts, 3.66 Amp at .97 PF.  I can't
| verify that it is really moving 6000 BTUs, but it quickly cools my study on the
| hottest south Florida weather we have had so far this year.
|
| To be fair, it is a high-end product and costs double what you would pay for a
| less efficient model.  Depending on the hours you use it and what you pay for
| power, it may never pay for itself.  On the other hand, if you are off-grid
| perhaps now you can afford to be cool.  It is considerably larger and heavier
| than comparable models, but I had no problem installing it myself.  For you
| earth huggers, it has the newest, greenest, refrigerant (R-410A) .
|
| Our plan is to use the study as a cool room in the dog days of summer and leave
| our central AC off for most of the day.  We have been doing the same in our
| bedroom at night for years now.  Now that we are retired folks (well, actually
| my last day at work is next week) we have to figure out how to live on the
| cheap!  There is no reason to cool this entire uninsulated 3/2 house just for
us
| two empty-nesters.
|
| http://www.haieramerica.com/en/product/ESAD4066
|
| Vaughn
|
| --
| Will poofread for food.
|
|
|
|

Quick update the wiki http://en.wikipedia.org/wiki/R-410A

R-410A operates at a higher pressure tha R-22, thus the larger footprint.
Hopefully the system was designed properly, and
will last for some time.

Cheers

 

  I have a use for such an air conditioner that looks at Watts,
a little differently; as thermal Watts.

 Your 6000BTUs = 1,758 Watts.  And it can remove that
much heat continuously.
(Btu x 0.293 = W)

 I would estimate that there could be somewhere up to
about 700 Watts of heat to be removed from components
to be cooled in a high power home computer.
  700 W x 3.414 =  2,390 Btu
(W x 3.414 = Btu)

  So such an air conditioner could chill water for two such
computers and have a considerable operating margin.
(There will be some heat loss in any chilled water cooling
setup.)

  A high reliability and lower operating cost would be major
points of consideration.


  Luck;
      Ken