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Internet # 312907921

Model # KSTAW12CE

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12,000 BTU (DOE) Window Air Conditioner Cools 550 sq. ft. with Dehumidifier and Remote in White

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  • 3-cooling speeds, 3-fan speeds, plus auto cool
  • Programmable 24-hour on/off timer
  • Easy-clean, tilt-out mesh filter with check filter alert
  • View More Details

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Product Details

About This Product

With reliable, window-mounted air conditioning, Keystone produces consistent cooling to keep you comfortable, even on the hottest days. This 12,000 BTU window-mounted air conditioner can effectively cool rooms up to 550 square feet with dehumidification up to 2.5 pints per hour to remove moisture from the air. Perfect for small to medium sized living spaces like apartments, dorm rooms, sheds, and much more. The unit features a unique remote with a thermostat built in to sense the temperature of where you are in the room and adjusts as needed automatically. Money saving features include energy saver mode, sleep mode, and a programmable 24-hour timer. You'll know when it's time to easily remove and clean the mesh filter with the Check Filter alert. Keystone not only provides a 1-year warranty but ensures that you stay cool and comfortable at a cost-conscious price.

Highlights

  • 12,000 BTU air conditioner for window-mounted installation
  • 6.5-ft. LCDI power cord with NEMA 5-15P plug uses standard 115V electrical outlet
  • Cools a room up to 550 sq. ft. with dehumidification up to 2.5 pints per hour
  • Electronic controls with LED display allows you to easily select options with the touch of a button
  • Temperature sensing LCD remote control allows you control the temperature from across the room
  • Auto-restart saves your settings for when power is restored to the unit
  • Adjustable air flow direction allows you to easily control the direction of the cool air
  • 3 cooling speeds, 3 fan speeds, plus Auto Cool for cooling flexibility
  • Programmable 24-hour on/off timer cools on your schedule
  • Energy-saver mode conserves energy and saves you money
  • Sleep mode gradually increases room temperature after being activated
  • Easy-clean, tilt-out mesh filter with Check Filter alert on the unit
  • Contains energy efficient R32 refrigerant - cannot ship via air freight
  • 3 cooling speeds and 3 fan speeds for cooling flexibility
  • Window installation kit included
  • Minimum window height: 15.5 inches
  • Window width dimensions: 23" minimum / 36" maximum
  • U.L. safety listing
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 312907921

Model # KSTAW12CE

Specifications

Dimensions: H 14.6 in, W 21.5 in, D 19 in

Dimensions

Product Depth (in.)

19 in

Product Height (in.)

14.6 in

Product Width (in.)

21.5 in

Window opening maximum height (in.)

15.5 in

Window opening maximum width (in.)

36 in

Window opening minimum height (in.)

15.5 in

Window opening minimum width (in.)

23 in

Details

Air Conditioner Features

Filter Light Reminder, Sleep Mode, Timer

Appliance Category

A/Cs and Fans

Appliance Series

Not Applicable

BTU Cooling Rating (ASHRAE)

12000 BTU

BTU Cooling Rating (DOE SACC)

12000 BTU

BTU Heat Rating

No Heat

Color Family

White

Coverage Area (Sq.Ft)

550 Sq.Ft

Decibel (Sound) Rating

61 dBA

Filter Type

Mesh

Heater Included

Without Heater

Included

Remote Control, Window Venting Kit Included

Number of Cool Settings

3

Number of Fan Speeds

3 Speeds

Plug Type

Parallel

Refrigerant Compatibility

R-32

Returnable

7-Day

Voltage (volts)

115

Wattage (watts)

1000

Window Type

Single Hung

Warranty / Certifications

Certifications and Listings

UL Listed

Manufacturer Warranty

1 year

Questions & Answers

Does this have heat included as well ?
ByOct 20, 2026
1 Answer | 
Answer This Question

This product does not include heat.

By|Oct 20, 2026


    Seer rating
    ByOct 9, 2026
    1 Answer | 
    Answer This Question

    This unit has a CEER rating of 11.8.

    By|Oct 13, 2026


      what is the weight of unit KSTAW18CRon
      BySep 10, 2026
      1 Answer | 
      Answer This Question

      This unit weighs 117.1lbs with a shipping weight of 129lbs.

      By|Sep 11, 2026


        Are all these questions about the unit above, if so why are there people asking about other units?
        ByAug 22, 2026
        0 Answer | 
        Answer This Question

        What is the weight of the KSTAW06DE unit?
        ByAug 22, 2026
        1 Answer | 
        Answer This Question

        Hello, The weight of model KSTAW06DE is 45.1 lbs. Thank you

        By|Aug 23, 2026


          If the unit only draws 4.6 amp as it was stated in one of the comments and the unit has a Nema type 6, 15P which Nema shows 15 amp plug why do we need a 20 Amp Circle breaker
          ByJul 9, 2026
          1 Answer | 
          Answer This Question

          The previous comment was referencing a different model number. This model will not work with a standard 115V outlet -- the NEMA 6-15P plug requires a dedicated 250V circuit for safety purposes.

          By|Jul 9, 2026


            HOW DOES IT DRAIN
            ByJun 28, 2026
            1 Answer | 
            Answer This Question

            Top rail and Sliding Panels at each side are offset to provide the proper pitch to the rear of (5/16"). This is necessary for proper condensed water utilization and drainage. If you are not using the Side Panels for any reason, this pitch to the rear must be maintained.

            By|Jun 30, 2026


              Is it compatible with this outlet?
              ByMay 21, 2026
              0 Answer | 
              Answer This Question

              Viewing 1-8 of 27

              Customer Reviews

              4.1 out of 5

              • 4.1 out of 49 reviews
              • 25% recommend this product
              Filter by:
              Showing 1-10 of 49 reviews
              Noisy, difficult controls
              It cools well enough. Two major complaints. 1 - it is so noisy, even on lowest setting. 2 - the controls are completely unintuitive lots of symbols and buttons. Need the manual to understand. I would not purchase again.
              by
                The air conditioner does a good job cooling and dehumidifying small spaces. I use it in an approx. 114 sq foot room. The noise level isn't bad at the lowest fan setting. I found it bothersome for the first few days sleeping with it on, but I got used to it. The bigger issue is the light. Being a day sleeper, I need to block out light and the styrofoam inside the unit allows light to bleed right through. It wouldn't take much for them to put light blocking inside, but I suppose they count on most people to sleep at night. The thermostat also seems to have trouble reading the room temperature correctly. It thinks it's reached the temperature when it's way off. It seems to happen mostly when it's cool outside, so that could be affecting the reading. You can work around the issue by using the "isense" feature of the remote. Instead of the unit reading the room temperature, the remote sends a signal to the AC of the temperature where the remote is located. I recommend purchasing extra foam insulation for use around the unit. It doesn't come with enough. I also purchased 1 inch rigid foam panel insulation to improve the insulation around the unit and block light. It's cheap and you get enough that you can make several mistakes with your cuts and have enough for do-overs.
                by
                Even though it came with a big dent that pressed into the compressor it works. I would have returned it however, the reason i opted for delivery was due to how heavy it is, i have no way to get it back to home depot for return.
                by
                Response from Product ExpertApr 8, 2026
                Thank you for your feedback. We’re sorry to hear about the dent. Please reach out to our customer support team at Keystonecs@keystone-products.com if you need further assistance.
                • Verified Purchase
                PERFECT 5000 BTU for our needs!
                PERFECT 5000 BTU a/c for the kitchen area, which pushes the cold air into the main living area of the house! I don't have to lower the central a/c just to cool off the one place that's always hot! Although the controls aren't described very well in the directions (or on the panel), it's easy to figure out. The panel has symbols instead of "L, M, H", for example. Installation is a little more difficult for us since we don't have "regular" windows, but it's standard like other window units. Also has a heat function, that I tested for a second, and dehumidification. VERY pleased! Tried to upload a video, but program won't let me.
                by
                Response from Product ExpertJul 22, 2025
                Thank you for your positive feedback. We are pleased to hear that it met your expectations.
                  Lightweight handy little window unit!
                  [This review was collected as part of a promotion.] This little window unit gets our back Arizona room surprisingly icy for its size. It’s lightweight, so instillation is super easy. I will say it’s a bit noisy, so I wouldn’t put it anywhere you want to sleep; but that’s to be expected with most ac units. The filter lets you know when it needs to be replaced, you just slide it out and clean it with water and pop it right back in. It has a remote control that makes it easy to use from anywhere in the room. Pretty handy for a 2 bedroom apt or a house that needs extra cooling!
                  by
                    Perfect for this summers heat!
                    [This review was collected as part of a promotion.] Cool breeze!!! I can’t wait to get this installed for my bedroom. This seems like a functional energy efficient air conditioner and I’ve always been impressed by the Keystone brand. It’s exciting that it came with a remote which makes life a bit easier! I’ll be updating to comment on the noise level as soon as it’s installed. The design looks great amongst any decor and will be greatly loved. The manual is easy to follow and all the parts are included. Yay no missing parts!!!
                    by
                      Cools down a room
                      [This review was collected as part of a promotion.] This AC can really cool down a room. It was very easy to install into the window. The remote is very simple to learn to use. It is not as loud as the older model i own.
                      by
                        Super efficient, energy saving, easy to install
                        [This review was collected as part of a promotion.] Thank you very much, it's perfect, Maximum Comfort: This window unit features 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers and timer; Aside from cooling, 2.3 pints of moisture from the air is removed every hour with the built-in dehumidification system Washable Filter: The check filter indicator light will alert you when it is time to clean; Just slide the washable, reusable filter out of the window air conditioner with remote control and clean Smart Remote Control: The remote takes the temperature of the room you are in, displays it on the LCD screen and sends a signal to your window air conditioner unit every 3 minutes for accurate cooling Energy Saving Comfort: Our window ACs will give your electric bill a break by using the 'Energy Saver' or 'Sleep' mode that automatically lowers settings Super efficient, energy saving, easy to install I like that it has a remote control
                        by
                          The AC was damaged in shipping I have pictures. But it works.
                          by
                          • Verified Purchase
                          Bought because the older identical one finally gave out ater many years of use. It works identical to m old one so no new learning needed. Also fit perfectly in window.
                          by
                          • Verified Purchase
                          Showing 1-10 of 49 reviews