Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
frontpage Posted by UN0335 • Apr 1, 2025
frontpage Posted by UN0335 • Apr 1, 2025

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

(Availability May Vary)

$280

$380

26% off
Costco Wholesale
193 Comments 77,703 Views
Get Deal at Retailer
Good Deal
Save
Share
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

Deal Score
+107
Good Deal
Get Deal at Retailer
Leave a Comment
To participate in the comments, please log in.

Top Comments

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
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.
Bought a couple years ago. It's a great AC, super quiet…. But yeah, VERY hard to clean the fan. It gets really dirty in there and yet they made it almost impossible to access it. My fan got so clogged up, airflow was barely getting thru. Would be a perfect AC if they'd only make it easier to clean that fan.

193 Comments

Sign up for a Slickdeals account to remove this ad.

Apr 2, 2025
3 Posts
Joined Apr 2024
Apr 2, 2025
AmusedThread3052
Apr 2, 2025
3 Posts
Quote from robsnyder22 :
YMMV, I just spray it all down with coil cleaner, blower wheel and all, spray it with a brand new clean water pump up sprayer after 10 minutes and put a fan on it to dry everything out thoroughly. I use mine in Florida continuously. Way easier than disassembling everything. I maintain 4 of them doing this exact technique. I should do a youtube video of me doing mine, but I am sure it could potentially break the unit one day. So far, 12-15 cleanings later, their all going strong, and clean too.BTW: This air conditioner 12k uses nearly the same amount of energy as the 8k and idles down to 95W or so when cooling minimally. The 8K Idled back about the same cooling minimally. The main difference is that the 12K can ramp up to using 780W or so while the 8K maxed out at like 460W.
If I get one it's going on the 2nd floor in a bonus room above the garage, so this method would be quite tricky.
Apr 2, 2025
3,573 Posts
Joined Apr 2015
Apr 2, 2025
SeanD1497
Apr 2, 2025
3,573 Posts
Quote from arla-sd :
The 8k BTU variant is Wirecutter's top pick for a window air conditioner. I have this 12k BTU model, and I rather like it - it's quiet, and it keeps the space at a steady temperature. While installing it properly is annoying, the upside is that it comes with a mounting bracket and some pretty decent insulation, so it's going to have a much tighter fit than most other window air conditioners.
Seconding all of this.
I got my elderly mom the 8k one last year, and we're both impressed by it. It's very quiet, and she doesn't even realize when it kicks on in the next room. The install wasn't the most straightforward but wasn't what I'd call difficult. I'm confident that it's secure, and yes, it seems to be a better overall fit than most I've seen. I have central air at home now, but if I needed another AC unit there would be no shopping, I'd absolutely just get another one of these, whether the 8k or 12k.

Oh, and I don't remember the details or if this is still available, but it also qualified for an EnergyStar rebate of $50. Might have been a state program here in Ohio but I think it was through First Energy. Worth looking into with the local utility, for anyone buying now.
Last edited by SeanD1497 April 1, 2025 at 06:06 PM.
Apr 2, 2025
3,252 Posts
Joined Nov 2012
Apr 2, 2025
Husk3rPow3r
Apr 2, 2025
3,252 Posts
Quote from mroxer :
Have this one, not sure if mine is faulty, but flies gets in through the AC and into my house, took a month to figure out why there are so many flies. Did this happen to anyone?

Gaps are also sealed, literally can see the flies from outside coming out of the AC.

I missed out on the sales last year, but hopeful this year. I thought I saw other reports of bugs getting through it. Didn't seem totally rare
Apr 2, 2025
250 Posts
Joined Jun 2010
Apr 2, 2025
super_fizzzz
Apr 2, 2025
250 Posts
It emit a very annoying high frequency noise. Lg dual inverter one I what you need if you want a quiet window AC.
Apr 2, 2025
670 Posts
Joined Aug 2013
Apr 2, 2025
SkyeC
Apr 2, 2025
670 Posts

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

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
7
Apr 2, 2025
878 Posts
Joined Nov 2011
Apr 2, 2025
topshelf207
Apr 2, 2025
878 Posts
Bought two of the 8k models a few years back in September of that year. Put them away for the winter in October and the following May one of them didnt work.

Home depot was great about taking it back as a return, even though it was months later. I had to get an RMA from Midea though.

I still may buy another one with having experienced that. They are just so damn quiet compared to regular window AC's. But really if you have the space in your breaker panel, the way better option it to just install a mini split heat pump. It's not really that hard for a DIY'er, even with the models that require vacuuming the lines.

(I installed a 24k btu Senville mini split in my garage 3 years ago)
2
Apr 2, 2025
971 Posts
Joined Sep 2011
Apr 2, 2025
kylefifa
Apr 2, 2025
971 Posts
Do I need to bring back the air conditioner iwhile requesting price adjustment at counter

Sign up for a Slickdeals account to remove this ad.

Pro
Apr 2, 2025
2,757 Posts
Joined Jul 2020
Apr 2, 2025
ThirstyCruz
Pro
Apr 2, 2025
2,757 Posts
Quote from Caleo :
Excess humidity (indoor and out) can do it alone, but so can things like turning it off right after cooling aggressively and just leaving it (which often traps more moisture inside than is ideal, especially on the coils). Setting a really low manual fan speed can often cause extra moisture to build up.

They can be made to, since they basically just sit on their sill-based stand, but you'll have to make a good-fitting fill panel to take up the open space.

They can vary quite a lot in real-world use depending how hot it is outside, if it's not too terribly hot they might only use 450-600W on 'max' cooling. That's where I typically saw mine operate. Sometimes up in the 1000W range on a hot 95-100f+ day.

Quite informative. Suppose environment impact as well - city vs suburbs or country? Thanks for the very well rounded responses
Apr 2, 2025
2,374 Posts
Joined Mar 2009
Apr 2, 2025
softrider
Apr 2, 2025
2,374 Posts
Quote from Musicaholic8000 :
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
I haven't installed mine yet as I bought them at the end of last season. But I have purchased a couple of these Frost King coil cleaners which some report work well with this air conditioner to combat the mold growth.

https://www.amazon.com/dp/B007I7KZN0?ref=nb_sb_ss_w_as-reorder_k3_1_13&amp=&crid=27EYV9PFEWTOV&spref... [amazon.com]
2
1
Apr 2, 2025
2,604 Posts
Joined Dec 2010
Apr 2, 2025
radars
Apr 2, 2025
2,604 Posts
Did you sleep well while it was running at night?
Apr 2, 2025
197 Posts
Joined Jan 2008
Apr 2, 2025
gerbils
Apr 2, 2025
197 Posts
I wish inverted U shaped AC's were on sale. I'd like a full view outside...
Apr 2, 2025
209 Posts
Joined May 2006
Apr 2, 2025
Bullet4Fun
Apr 2, 2025
209 Posts
We have horizontal windows - can I install these on it sides and it would still work efficiently? Or is that a No-No (have not see any option for horizontal windows - and portable ACs are not as efficient).
Apr 2, 2025
472 Posts
Joined Nov 2009
Apr 2, 2025
soldiersinx
Apr 2, 2025
472 Posts
Is this the updated model with the drain plug and revised bracket?
Apr 2, 2025
5,351 Posts
Joined Nov 2007
Apr 2, 2025
MBZ321
Apr 2, 2025
5,351 Posts
Quote from kylefifa :
Do I need to bring back the air conditioner iwhile requesting price adjustment at counter
Yes, and also the window and surrounding house it is installed in.
2
1

Sign up for a Slickdeals account to remove this ad.

Apr 2, 2025
38 Posts
Joined Mar 2019
Apr 2, 2025
MichaelM25
Apr 2, 2025
38 Posts
Quote from justinxip :
This might be a dumb question, but does this mean it will only be available in-warehouse starting 4/9? So if I went that day, I'd have a good chance at grabbing one or two of these units for this price?

No, get now, adjust price later.

Related Searches

Popular Deals

View All

Trending Deals

View All