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neomatrixviper 35.3K Views
May 10, 2026 11:27 PM

Costco Members: Midea 12,000 BTU Smart Inverter Window Air Conditioner

$330

$430

23% off
+ Free S/Hat Costco Wholesale
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Deal Details
Costco Wholesale has for its Members: Midea 12,000 BTU Smart Inverter Window Air Conditioner with MShield (MAW12AV1QWT-C) on sale for $329.99. Shipping is free.

Thanks Community Member neomatrixviper for sharing this deal

Note, Non-Members may purchase but are subject to a 5% surcharge

Features:
  • For Spaces up to 550 Sq. Ft. and Easy Installation with Included Snap in Bracket
  • Energy Star Certified
  • Inverter Technology Delivers 35% Energy Savings Compared to DOE Minimum CEER Requirement
  • Matter Certified Unit with App & Voice Control: Control from Anywhere with the App and Voice Assistant
  • MShield Air Ionizer Technology: Reduces Odors, Smoke and Gases in the Air

Editor's Notes

Written by slickdewmaster | Staff
  • About this Offer:
    • $100 manufacturer's savings is valid through 6/7/26. While supplies last.
  • Reviews:
    • Receives 4.5 Stars out of 5 Stars based on over 290 Customer Reviews.
  • About this Store:
    • If you don't have a Costco Warehouse Membership, you can sign up here.

Original Post

Written by neomatrixviper
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for its Members: Midea 12,000 BTU Smart Inverter Window Air Conditioner with MShield (MAW12AV1QWT-C) on sale for $329.99. Shipping is free.

Thanks Community Member neomatrixviper for sharing this deal

Note, Non-Members may purchase but are subject to a 5% surcharge

Features:
  • For Spaces up to 550 Sq. Ft. and Easy Installation with Included Snap in Bracket
  • Energy Star Certified
  • Inverter Technology Delivers 35% Energy Savings Compared to DOE Minimum CEER Requirement
  • Matter Certified Unit with App & Voice Control: Control from Anywhere with the App and Voice Assistant
  • MShield Air Ionizer Technology: Reduces Odors, Smoke and Gases in the Air

Editor's Notes

Written by slickdewmaster | Staff
  • About this Offer:
    • $100 manufacturer's savings is valid through 6/7/26. While supplies last.
  • Reviews:
    • Receives 4.5 Stars out of 5 Stars based on over 290 Customer Reviews.
  • About this Store:
    • If you don't have a Costco Warehouse Membership, you can sign up here.

Original Post

Written by neomatrixviper

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Top Comments

Krametrain
298Comments
94Reputation
299.99 in store price
Go to Comment
avalon
14.4KComments
11.4KReputation
this is a great A/C

there is only one problem and it's huge after awhile

the blower fan is nearly impossible to clean
Go to Comment
FancyMeal539
5Comments
10Reputation
We've had both the Midea and the HiSense ones. We loved the several Midea ones we had, but they got recalled for the mold issue after we'd used them for about 3 years. The recall $$ more than covered the HiSense replacement. So far, the HiSense has also been really great. It blows as cold as the Midea, and since both are inverter tech, both are really very quiet. I've got to assume Midea has figured out the challenges with mold now, so the biggest difference between the two is the design. For me, the HiSense has been a much improved overall experience.
I don't keep the AC in the bedroom window all year, so the process of install and pulling it is important. While both are somewhat heavy, the Midea one always felt like it would flex and collapse on itself when lifting it out of the window. The HiSense feels much more compact and rigid. I haven't checked, but it also seems smaller/lighter. My wife is really sensitive to light in the room when we sleep, and one challenge with the Midea one is that in order for the room blind to black out the room, it would have to slide behind the room side of the AC unit (in between the ac and the window). For the HiSense, this is not an issue since the blinds can come down to the top of the room side of the unit, and then the sides are blocked out with the included foam. We use a roller shade, so it was thin enough to fit between the AC and window on the Midea, but if we had other options like mini-blinds or slats, we would have had a lot of light in the room with the Midea.
Since we mostly keep the blinds down in our room, the other benefit of the HiSense is aesthetic - there is only a small footprint on the room side of the AC unit.
Again, this is not to say there is anything wrong with the Midea as long as they've fixed the mold. It was really great as well. In terms of function, they both seem to be pretty equal. The HiSense ones had several sales last year through Costco. As it is getting hotter, I wouldn't wait to get one, but if you get one Costco, be sure to watch out for a drop in price in the 30 days after since they will honor the price adjustment as long as you request during the time it is on sale and within 30 days of purchase.
Go to Comment

Community Reviews

This Midea 12,000 BTU smart inverter window air conditioner is praised for strong cooling, quiet operation, and efficient power use, with smart app energy tracking on some units. Installation is usually described as manageable, though the unit is heavy and may take two people, and it works well for bedrooms and other single rooms. The main cautions are the earlier mold recall history, occasional drain plug and energy reporting quirks, and possible breaker trips on crowded circuits. It is a solid fit when you want window AC performance without portable AC noise.

  • The window installation can obstruct window access and may require careful planning for window guards and clearance.

    EpitaphDrewBot13thespacecowboy

  • Energy reporting in the app can show as not supported even after firmware updates.

    Cooldeals77DanteZero

  • The unit can trip a breaker if circuit capacity is exceeded, especially with other high-wattage devices running.

    JimG5349TidalWaveOne

  • The blower fan can become nearly impossible to clean after extended use.

    avalon

Common Questions (6)

AI-generated summary based on comments from the community. Updated ago

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112 Comments

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May 13, 2026 4:28 AM
5.4K Comments
Joined Jul 2008
thespacecowboyMay 13, 2026 4:28 AM
5.4K Comments
Quote from Impulse_shopper View quoted comment :
Do these need a special outlet or will any standard one work? We have one AC in our apartment in the living room and it does not cool our bedrooms, interested in getting one for my room.
It works on a regular outlet.
1
May 13, 2026 4:43 AM
48 Comments
Joined Sep 2013
jjaappMay 13, 2026 4:43 AM
48 Comments
Bought it last week before discount, just got $100 refund, well worth the original in store 399 price. It's quite and easily cools 300sqft room with vaulted ceilings, easy install.

Couple things to note.
Check with your electric Co. In CA under DWP this qualifies for rebate at LA cool website.

Also, this kept tripping my circuit breaker that has a couple other low voltage things on it. Asked ai and it suggested replacing the 20 year old AFCI breaker, as the older AFCI breakers can have an issue with many new appliances creating electrical noise that newer breakers have resolved. That did the trick, been working flawless for a week now on new circuit breaker.
Also, instructions are not clear. Be sure to replace the blue plug on bottom corner with the black plugs supplied. This is the fix different than the older model's having mold issues. The black plugs let the water drain out slowly.
Last edited by jjaapp May 12, 2026 at 09:52 PM.
1
May 13, 2026 9:43 AM
54 Comments
Joined Dec 2007
mattybMay 13, 2026 9:43 AM
54 Comments
Quote from jjaapp View quoted comment :
Bought it last week before discount, just got $100 refund, well worth the original in store 399 price. It's quite and easily cools 300sqft room with vaulted ceilings, easy install.

Couple things to note.
Check with your electric Co. In CA under DWP this qualifies for rebate at LA cool website.

Also, this kept tripping my circuit breaker that has a couple other low voltage things on it. Asked ai and it suggested replacing the 20 year old AFCI breaker, as the older AFCI breakers can have an issue with many new appliances creating electrical noise that newer breakers have resolved. That did the trick, been working flawless for a week now on new circuit breaker.
Also, instructions are not clear. Be sure to replace the blue plug on bottom corner with the black plugs supplied. This is the fix different than the older model's having mold issues. The black plugs let the water drain out slowly.
Can you confirm if the arms need to be screwed in? I don't see the manual mentioning it, but the videos show it.
May 13, 2026 2:11 PM
5.4K Comments
Joined Jul 2008
thespacecowboyMay 13, 2026 2:11 PM
5.4K Comments
Quote from jjaapp View quoted comment :
Bought it last week before discount, just got $100 refund, well worth the original in store 399 price. It's quite and easily cools 300sqft room with vaulted ceilings, easy install.

Couple things to note.
Check with your electric Co. In CA under DWP this qualifies for rebate at LA cool website.

Also, this kept tripping my circuit breaker that has a couple other low voltage things on it. Asked ai and it suggested replacing the 20 year old AFCI breaker, as the older AFCI breakers can have an issue with many new appliances creating electrical noise that newer breakers have resolved. That did the trick, been working flawless for a week now on new circuit breaker.
Also, instructions are not clear. Be sure to replace the blue plug on bottom corner with the black plugs supplied. This is the fix different than the older model's having mold issues. The black plugs let the water drain out slowly.
And replace the plug BEFORE installing it, unlike me lol
2
May 13, 2026 2:12 PM
5.4K Comments
Joined Jul 2008
thespacecowboyMay 13, 2026 2:12 PM
5.4K Comments
Quote from mattyb View quoted comment :
Can you confirm if the arms need to be screwed in? I don't see the manual mentioning it, but the videos show it.
It's to required, no. Its only really if it's attached to a siding that's uneven.
May 13, 2026 2:15 PM
189 Comments
Joined Nov 2015
yerfdog2314May 13, 2026 2:15 PM
189 Comments
Quote from thespacecowboy View quoted comment :
Agree, the booklet says $299.99

https://daily.slickdeals.net/shopping/costco-coupon-book/#section-1
That also has an asterisk at the bottom of the page saying Online prices may be higher.
May 13, 2026 2:23 PM
54 Comments
Joined Dec 2007
mattybMay 13, 2026 2:23 PM
54 Comments
Quote from thespacecowboy View quoted comment :
It's to required, no. Its only really if it's attached to a siding that's uneven.
Thanks for answering. To clarify I was asking about the bracket arms inside, attaching to the side of window trim. Not the outside arms.

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May 13, 2026 5:46 PM
5.4K Comments
Joined Jul 2008
thespacecowboyMay 13, 2026 5:46 PM
5.4K Comments
Quote from mattyb View quoted comment :
Thanks for answering. To clarify I was asking about the bracket arms inside, attaching to the side of window trim. Not the outside arms.
Got it. It's installed "inside" the window frame. Most of the weight is taken with the outside feet as the back is heavier than the front. It's braced against the window sill internally with the horizontal bracket. You should screw down through that bracket into the window plastic or into the window sill on the inside.
The stabilizing arms also screw into the sides of the walls. But honestly I don't think screwing into the sides really anchors that much - the screws are small. I think it's more supportive than structural, if you see what I mean.
1
May 13, 2026 5:47 PM
116 Comments
Joined Jan 2016
KenEsqMay 13, 2026 5:47 PM
116 Comments
  1. These are the best window A/C units I've ever owned.
  2. The company stood behind the recall and either did repairs or sent checks that covered more than the cost of new.
  3. In warehouse they're selling for $299 around us. They were originally $399.
1
May 13, 2026 7:14 PM
48 Comments
Joined Sep 2013
jjaappMay 13, 2026 7:14 PM
48 Comments
Quote from thespacecowboy View quoted comment :
And replace the plug BEFORE installing it, unlike me lol
lol, me too
1
May 13, 2026 8:07 PM
201 Comments
Joined Oct 2010
snapcoyoteMay 13, 2026 8:07 PM
201 Comments
Do you leave the unit in the window during the winter? Just curious if it's easy to remove and install every year.
May 13, 2026 9:11 PM
7.6K Comments
Joined Aug 2007
lotsalotsadealsMay 13, 2026 9:11 PM
7.6K Comments
Quote from norcalgamer707 View quoted comment :
How mich does this cost to run monthly? California already changes and arm and a leg for electricity.
I need a portable ac with a vertical outlet for the window.
This is such a stupid question.

If I run it to cool a 2000 sq ft house in FL (DOABLE BTW)
vs
you in a 800 sq ft apt.
May 14, 2026 6:24 PM
45 Comments
Joined Aug 2011
spectacularoneMay 14, 2026 6:24 PM
45 Comments
We have this exact unit and it was updated after mold recall so don't let that deter you. It's super cheap to run, on par with a mini split.
1
May 15, 2026 6:31 PM
186 Comments
Joined Jul 2016
cmyk01rgbMay 15, 2026 6:31 PM
186 Comments
Quote from avalon View quoted comment :
this is a great A/C

there is only one problem and it's huge after awhile

the blower fan is nearly impossible to clean
What makes it harder than other A/C units?

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May 15, 2026 10:56 PM
65 Comments
Joined Nov 2009
EpitaphMay 15, 2026 10:56 PM
65 Comments
Quote from snapcoyote View quoted comment :
Do you leave the unit in the window during the winter? Just curious if it's easy to remove and install every year.
Not recommended to reinstall every year. This design still enables you to open your window but with just obstruction of the AC. If you need the window with no obstruction from the bottom, you can look into other options such as the upside down u, "n" shape air conditioners or ACs installed at the top.
1

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