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UN0335 109K Views
Apr 1, 2025 5:02 PM

Costco In-Warehouse: Midea U 12,000 BTU Smart Inverter Window Air Conditioner

$280

$380

26% off
(Availability May Vary)at Costco Wholesale
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Deal Details
Costco Wholesale [Deal Reference] has Midea U 12,000 BTU Smart Inverter Window Air Conditioner Unit w/ MShield (White; MAW12AV1QWT-C) on sale for $279.99 valid for in-warehouse purchase for Costco Members only.

Alternatively, if you wish to purchase this unit online, it is available for $299.99. Shipping is free.

Thanks to community member UN0335 for finding this deal

Note, must login to your Costco account w/ an active membership to purchase.

About the Product
  • U-Shaped Groove/Drop-In Install Design
  • 12,000 BTU/32 dBA/1140W
  • 4-Way Air Direction/
  • 5 Cool Setting/4 Fan Speed
  • 550 Sq. Ft. Maximum Coverage Area
  • Energy Star Certified
  • MShieled Air Ionizer Technology
  • Smart Control w/ SmartHome App

Editor's Notes

Written by Discombobulated | Staff
  • About the Deal
    • Product is available for in-warehouse purchase at the reduced/listed price; maximum of $80 Off/discount
    • Easy installation w/ snap in bracket; recommended for areas/spaces up to 550 sq. ft.
    • You may open your window to enjoy fresh air even w/ your AC installed
    • Product Item #2677429 for reference
    • Limit 5 per customer
    • Offer valid through May 4, 2025 or while promotional price/supplies last

Original Post

Written by UN0335
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale [Deal Reference] has Midea U 12,000 BTU Smart Inverter Window Air Conditioner Unit w/ MShield (White; MAW12AV1QWT-C) on sale for $279.99 valid for in-warehouse purchase for Costco Members only.

Alternatively, if you wish to purchase this unit online, it is available for $299.99. Shipping is free.

Thanks to community member UN0335 for finding this deal

Note, must login to your Costco account w/ an active membership to purchase.

About the Product
  • U-Shaped Groove/Drop-In Install Design
  • 12,000 BTU/32 dBA/1140W
  • 4-Way Air Direction/
  • 5 Cool Setting/4 Fan Speed
  • 550 Sq. Ft. Maximum Coverage Area
  • Energy Star Certified
  • MShieled Air Ionizer Technology
  • Smart Control w/ SmartHome App

Editor's Notes

Written by Discombobulated | Staff
  • About the Deal
    • Product is available for in-warehouse purchase at the reduced/listed price; maximum of $80 Off/discount
    • Easy installation w/ snap in bracket; recommended for areas/spaces up to 550 sq. ft.
    • You may open your window to enjoy fresh air even w/ your AC installed
    • Product Item #2677429 for reference
    • Limit 5 per customer
    • Offer valid through May 4, 2025 or while promotional price/supplies last

Original Post

Written by UN0335

Community Voting

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Top Comments

SkyeC
710Comments
162Reputation
No comment on these specific units but if you're having problems with mold on any AC, you should just turn it to fan mode for 20m or so before shutting off.

All AC's work by transferring heat from one side of the unit to the other side, as part of this process the coils on the inside of the room will be ice cold (so they can absorb the heat in the room and move it to the outside) moisture will condense on the cold coils, it will then drip down in the pan and be directed outside, that's why AC's always dribble water on the outside.

If you shut the unit off there will be a lot of moisture, all over the coils and in the pan. That moisture be food for mold in the right climates..

To avoid this, run it on the fan mode before turning it off, this will dry the unit out and avoid the mold issues
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BENJAMINB1246
296Comments
68Reputation
You do lose efficiency doing that. Most, if not all, are designed to hold a certain level/amount of water. They do this intentionally so the outdoor fan will "spray" the water on the outdoor coils, which helps with efficiency by cooling them down.
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nerds
367Comments
70Reputation
The way to avoid mold is never turn it off without running the fan a while AND never use the default energy save mode... because that turns off the fan *every time* they compressor turns off at the same time, leaving all the moisture everywhere. Leave it on auto or a specific fan speed and turn off emergy save mode always whenever use the AC. Because when it sits right after the compressor turns off, that's when all the moisture accumulates everywhere. Energy save node = grow mold inside AC.
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241 Comments

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Apr 2, 2025 3:40 PM
154 Comments
Joined Sep 2017
benagoodApr 2, 2025 3:40 PM
154 Comments
Good deal! Prices are often less in-store so get it at the store if you can. These also go on costco clearance during summer, so you can probably do better if patient.
These are quiet! Also, mine dont get along with GFCI outlets. Dont put on a GFCI outlet.
I have an 8k and a 12k. The 8k is a year older than the 12k. Both work really good. The 12k is used in our master during summer and keeps the master cold. We save $$$ by not cooling the entire house, and the power company cant cut it when demand is high (like they do to our central AC). The 8k is used for festivaling/car-camping. Inverter ACs start gently and dont require an oversized generator or a hard-start kit just to start them. I run the 8k on a 12V to 120V sine inverter.
Apr 2, 2025 4:23 PM
367 Comments
Joined Jul 2009
nerdsApr 2, 2025 4:23 PM
367 Comments

Our community has rated this post as helpful. If you agree, why not thank

The way to avoid mold is never turn it off without running the fan a while AND never use the default energy save mode... because that turns off the fan *every time* they compressor turns off at the same time, leaving all the moisture everywhere. Leave it on auto or a specific fan speed and turn off emergy save mode always whenever use the AC. Because when it sits right after the compressor turns off, that's when all the moisture accumulates everywhere. Energy save node = grow mold inside AC.
4
Apr 2, 2025 4:34 PM
296 Comments
Joined Aug 2013
BENJAMINB1246Apr 2, 2025 4:34 PM
296 Comments

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Quote from xulong View quoted comment :
we got one shipped by costco.com last year. it had a blue rubber plug that was supposed to be removed "between seasons" but we just removed it and ran it all year without the plug. so, no drilling necessary.
You do lose efficiency doing that. Most, if not all, are designed to hold a certain level/amount of water. They do this intentionally so the outdoor fan will "spray" the water on the outdoor coils, which helps with efficiency by cooling them down.
5
Apr 2, 2025 4:50 PM
338 Comments
Joined Dec 2008
naranjaApr 2, 2025 4:50 PM
338 Comments

Our community has rated this post as helpful. If you agree, why not thank

Cover for the winter if you aren't wanting to remove/reinstall the ac. Fits very well.
https://www.amazon.com/dp/B0BKZP6..._title_0_0

I also use foam filter to help keep it cleaner:
https://www.amazon.com/dp/B002GKC...tle_1&th=1
1
Apr 2, 2025 5:47 PM
652 Comments
Joined Nov 2013
professorxavierApr 2, 2025 5:47 PM
652 Comments
Quote from WhatIsSlicking View quoted comment :
Get portable ac and use plywood with cutouts for vents
Ahhh this is still like half the work of making the OP item work.
Apr 2, 2025 5:53 PM
2.4K Comments
Joined Oct 2012
WhatIsSlickingApr 2, 2025 5:53 PM
2.4K Comments
Quote from professorxavier View quoted comment :
Ahhh this is still like half the work of making the OP item work.
That's how I have it working with my horizontal window. Open the window. Make plywood cutout. Then make cuts on the piece for the ducts. Screw the ducts.

Now install that piece on window. Seal around it. Finally connect ducts from this piece to portable AC
Apr 3, 2025 12:06 AM
367 Comments
Joined Dec 2007
brettaculousApr 3, 2025 12:06 AM
367 Comments
Quote from Musicaholic8000 View quoted comment :
Read some reviews. People still complain of mold and it's not the easiest to disassemble. Real pain to clean the blower wheel as it's like 2ft long.
https://youtu.be/esPGXI-nVjI?si=LiFYHgfSkE__Ix-4
Same exact experience. It was full of mold at the end of last season. It's been sitting on my back porch disassembled all winter. It was great while it lasted (one summer).
1

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Apr 3, 2025 1:06 AM
1.1K Comments
Joined Apr 2008
vsspamApr 3, 2025 1:06 AM
1.1K Comments
Quote from dapperdeals55 View quoted comment :
The 12k BTU's peak is listed as 1140w. Where is the 780w figure from?
Quote from robsnyder22 View quoted comment :
Thats what I get off my Kill a Watt electrical meter.
I've seen up to 1100 w on my wattage meters for my 12000 BTU Midea.

Some meters may measure RMS (root mean square) values which is typically about .707 of peak values.

This is important to me as I use my Mideas as home AC backup in case of an electrical outage, having a portable generator, not a full standby generator.
Last edited by vsspam April 2, 2025 at 06:44 PM.
1
Apr 3, 2025 1:43 AM
1.1K Comments
Joined Apr 2008
vsspamApr 3, 2025 1:43 AM
1.1K Comments
I have a 8000, 10000, and 12000 BTU Midea U.

Going forward, I plan to only purchase a 12000 BTU since, as others have said, they can run at lower power/capacity as necessary, but may also be able to cool down an adjacent room or two.

My experience is that the 12000 unit also has a stronger fan that blows the air further away from the unit.
Apr 3, 2025 2:14 AM
700 Comments
Joined Jun 2012
C17chiefApr 3, 2025 2:14 AM
700 Comments
Def good unit for the price. I picked one up a couple years ago as a backup against central AC problems and for after hurricanes or any other extended outages. The main draw was the inverter and efficiency meaning ideal for generator since it doesn't have a big inrush when starting up, and the efficiency also helps, especially with solar/power station if you have a setup big enough to entertain running a small AC on it.

As it turns out, that purchase really payed off. Since then, it has seen over a month of use. In that time, a hurricane did come and had no power for about 10 days...and also since having it, my central AC catastrophically failed, so I was using it for almost 3 weeks to get by, allowing me to really consider options, find the right contractor, no huge rush to get installed, etc vs making rash decisions to get something slammed in as fast as possible. I was so impressed by the midea I had half the mind to get 2 or 3 more and just run them permanently!
Last edited by C17chief April 2, 2025 at 07:17 PM.
Apr 3, 2025 10:17 AM
737 Comments
Joined Jul 2005
blahbbsApr 3, 2025 10:17 AM
737 Comments
Quote from xulong View quoted comment :
we got one shipped by costco.com last year. it had a blue rubber plug that was supposed to be removed "between seasons" but we just removed it and ran it all year without the plug. so, no drilling necessary.
Nice. That must be a new feature. I definitely don't have that on my units.
Apr 4, 2025 1:26 PM
40 Comments
Joined Nov 2013
vaca232Apr 4, 2025 1:26 PM
40 Comments
FYI, there is a newer version of the MIdea U-Shaped air conditioners that addresses some of the problems mentioned in this thread. Home Depot sells them. The have part numbers with a 'U' in it instead of a 'V'. Like MAW12U1QWT, for example.

They have capacitive buttons and a chrome trim strip on the front.

The newer versions have a drain plug, have a 'Flash Cool' mode and seem to do a better job actually reaching their rated capacity, and also support Matter for smart home integration. They're also a little bit more expensive.

We have a few of the 8K versions and it's basically central air conditioning for a tiny fraction of the price.
Apr 4, 2025 2:28 PM
1.7K Comments
Joined Feb 2010
DallasGGApr 4, 2025 2:28 PM
1.7K Comments
Quote from vaca232 View quoted comment :
FYI, there is a newer version of the MIdea U-Shaped air conditioners that addresses some of the problems mentioned in this thread. Home Depot sells them. The have part numbers with a 'U' in it instead of a 'V'. Like MAW12U1QWT, for example.

They have capacitive buttons and a chrome trim strip on the front.

The newer versions have a drain plug, have a 'Flash Cool' mode and seem to do a better job actually reaching their rated capacity, and also support Matter for smart home integration. They're also a little bit more expensive.

We have a few of the 8K versions and it's basically central air conditioning for a tiny fraction of the price.
Is this newer version worth $145 more in price compared to Costco? Would Home Depot match the Costco $280 price?
1
Apr 4, 2025 6:39 PM
1.2K Comments
Joined Jan 2007
bamx2Apr 4, 2025 6:39 PM
1.2K Comments
Due to power limitations, I am looking for the 8K BTU model. Will it be available at Costco ?

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Apr 5, 2025 2:34 AM
205 Comments
Joined Jun 2014
NLCTApr 5, 2025 2:34 AM
205 Comments
Quote from vsspam View quoted comment :
I've seen up to 1100 w on my wattage meters for my 12000 BTU Midea.

Some meters may measure RMS (root mean square) values which is typically about .707 of peak values.

This is important to me as I use my Mideas as home AC backup in case of an electrical outage, having a portable generator, not a full standby generator.
It's because it's an inverter unit. It will throttle the fan and compressor to maintain a consistent temperature instead of turning on and off. So it may peak out at 1100W but once has cooled the zone it will draw less power to maintain it. That's why some people are saying 500-700W to maintain a zone.

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