Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Heads up, this deal has expired. Want to create a deal alert for this item?
expiredUN0335 posted Apr 01, 2025 05:02 PM
  1. Deal Image
Item 1 of 3
  1. Deal Image
  2. Deal Image
  3. Deal Image
Item 1 of 3
expiredUN0335 posted Apr 01, 2025 05:02 PM

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

(Availability May Vary)

$280

$380

26% off
Costco Wholesale
242 Comments 97,074 Views
Visit 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
+113
Good Deal
Visit Retailer

Leave a Comment

Unregistered (You)

Top Comments

SkyeC
684 Posts
162 Reputation
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
BENJAMINB1246
289 Posts
68 Reputation
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.
nerds
359 Posts
70 Reputation
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.

241 Comments

Sign up for a Slickdeals account to remove this ad.

Apr 01, 2025 10:41 PM
373 Posts
Joined Jul 2010
BLKCLDApr 01, 2025 10:41 PM
373 Posts
Quote from jayreezy :
Does anyone know if the 8000 btu ones ever go on sale as well?
Yes I believe they were last year for about $50 less. $229 I think it was.
Apr 01, 2025 10:47 PM
418 Posts
Joined May 2009
TheUrbanViewApr 01, 2025 10:47 PM
418 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
If you drill a couple of small weep holes in the back bottom of the case the water will drain out better and you won't have as bad of a mold issue.
Apr 01, 2025 10:52 PM
607 Posts
Joined Jan 2015
bookertttApr 01, 2025 10:52 PM
607 Posts
Have the 8k for years and it's been good. Installation in the first year was challenging.

Tip: if your sill plate has a decent slant, cut a 2x4 window width and put in on the sill and then go thru regular install directions. Also, cut pool noodles make for good extra insulation.
Apr 01, 2025 10:56 PM
115 Posts
Joined Sep 2013
erice2336Apr 01, 2025 10:56 PM
115 Posts
I'm waiting for the midea 12k heat pump window ac that has a heater. Costco had it a few years ago but it never came back. We only have horizontal siding windows.
Apr 01, 2025 11:03 PM
449 Posts
Joined Aug 2010
robsnyder22Apr 01, 2025 11:03 PM
449 Posts

Our community has rated this post as helpful. If you agree, why not thank robsnyder22

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
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.
3
Apr 01, 2025 11:04 PM
22 Posts
Joined Jan 2014
MichaelM4110Apr 01, 2025 11:04 PM
22 Posts
Quote from ejordan525 :
I can attribute to the mold issue. Mine lasted two seasons, but I didn't realize I'd have to maintain it other than cleaning the filter, etc. I just bought the newer 8k model with Matter connectivity since I believe the 12k was oversized for my bedroom (got it on sale 2 years ago at Costco). Once I get the 12k swapped out with the 8k, I'm going to try and disassemble the 12k, clean it, and move it to the garage for use.
Oversize doesn't do much on inverter ac, just run it on a lower fan speed so it will dehumidify more
Apr 01, 2025 11:07 PM
637 Posts
Joined Nov 2013
professorxavierApr 01, 2025 11:07 PM
637 Posts
Does this work on horizontal windows?

Sign up for a Slickdeals account to remove this ad.

Apr 01, 2025 11:18 PM
255 Posts
Joined Sep 2015
dapperdeals55Apr 01, 2025 11:18 PM
255 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.
The 12k BTU's peak is listed as 1140w. Where is the 780w figure from?
Apr 01, 2025 11:28 PM
669 Posts
Joined Nov 2013
WidowmakerApr 01, 2025 11:28 PM
669 Posts
Quote from erice2336 :
I'm waiting for the midea 12k heat pump window ac that has a heater. Costco had it a few years ago but it never came back. We only have horizontal siding windows.
I don't think they make the model with the heat pump anymore but I could be wrong. I have one that I bought a few years ago. I like it, it works very well.
Apr 01, 2025 11:35 PM
449 Posts
Joined Aug 2010
robsnyder22Apr 01, 2025 11:35 PM
449 Posts
Quote from dapperdeals55 :
The 12k BTU's peak is listed as 1140w. Where is the 780w figure from?
Thats what I get off my Kill a Watt electrical meter.
Apr 01, 2025 11:37 PM
255 Posts
Joined Sep 2015
dapperdeals55Apr 01, 2025 11:37 PM
255 Posts
Quote from robsnyder22 :
Thats what I get off my Kill a Watt electrical meter.
Nice! Does it ever hit wattages higher than that, even when maxed or at startup?
Apr 01, 2025 11:48 PM
5,782 Posts
Joined Dec 2004
CaleoApr 01, 2025 11:48 PM
5,782 Posts
Quote from Ps3Rules :
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.
Quote from ThirstyCruz :
This will be 4th season, and I simply maintain clean filter and been fine. What environment are you using it in that the blower fan is becoming that dirty so much so it reduces airflow?
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.
Quote from professorxavier :
Does this work on horizontal windows?
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.
Quote from dapperdeals55 :
The 12k BTU's peak is listed as 1140w. Where is the 780w figure from?
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.
Apr 02, 2025 12:23 AM
34 Posts
Joined Nov 2015
DukeWoolworthApr 02, 2025 12:23 AM
34 Posts
The best, most efficient and quietest air conditioner on the market. Heavy sumbitch, too (64#), and setting up the bracket an hour's work first time. I have three, now to be their third year. Great price, unchanged. Our Costco had plenty. Sale lasted for weeks.
Apr 02, 2025 12:49 AM
1,017 Posts
Joined Aug 2009
mroxerApr 02, 2025 12:49 AM
1,017 Posts
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.

Sign up for a Slickdeals account to remove this ad.

Apr 02, 2025 12:53 AM
1,269 Posts
Joined Dec 2007
WEVUDOApr 02, 2025 12:53 AM
1,269 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 think you got a bad unit

Leave a Comment

Unregistered (You)

Related Searches

Home & Home ImprovementLarge AppliancesAir ConditionersOccasionsEasterSpring SavingsMembership Required

Popular Deals

View All
Found by
$9.48$1327% off$9.48*: QINLIANF 3-Sided 3-Prong Surge Outlet Extender w/ 5x AC, 4x USB at Amazon
3
Found by
$3.79$1777% off[S&S] $3.79*: 72-Pack Maree Collagen Pimple Patches (Clear) at Amazon
0
Found by
$799$1,40042% offGiant Stance Mountain Bike $799
2
Found by
$15$2846% offBullstrap The Flex Case: Full-Grain Premium Leather Case (for iPhone 15/16; Pro/Pro Max) $15 + Free Shipping
6
Found by
$19$2524% off24-Oz Stanley Stay-Chill Beer Stein w/ Heavy Duty Big Grip Handle (Frost Gloss) $18.75 + Free Shipping w/ Prime or on $35+
3

Trending Deals

View All
Found by
Doordash Promo - 13% off order
7
Found by
$42$8450% offCRROPDA WiFi 6 Dual Channel (4k/1080p) Dash Cam $42 + Free S/H
7
Found by
$79$12134% offRyobi ONE+ 18V Cordless 3/8" Drill Kit w/ 1.5 Ah Battery, Charger, 53-Piece Accessories, Whole Stud Finder $79, More + Free Shipping
6
Found by
$15$2642% offBraun Series 3 Pro Skin Electric Shaver Replacement Head $15 w/ S&S + Free Shipping w/ Prime or on $35+
0
Found by
$31$5038% offLightning Deal: $31.44*: 34-Piece toolant Impact Magnetic Nut Driver Bit Set at Amazon
4