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Internet # 330548250

Model # KSTAP121HINV

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12,000 BTU (DOE) Portable Inverter Air Conditioner Cools 550 sq. ft. with Supplemental Heating and Dehumidifier in White

$649.99
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  • 12,000 BTU Supplemental Heating for year-round use
  • Dehumidifies up to 5.22 pints per hour for comfort and efficiency
  • Inverter technology for enhanced energy efficiency
  • View More Details

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Product Details

About This Product

With reliable air conditioning units, Keystone produces consistent cooling to keep you comfortable, even on the hottest days. This 14,000 BTU ASHRAE/12,000 BTU DOE portable air conditioner can effectively cool rooms up to 550 square feet with dehumidification up to 5.22 pints per hour to remove moisture from the air. Perfect for medium-sized living spaces like apartments, bedrooms, living rooms, and much more. It features special Inverter technology to eliminate wasted operation in the air conditioner by controlling the motor speed to exactly the amount of power that is needed to keep the room at the desired temperature. In addition, the inverter technology makes this unit more energy efficient than standard portable units. A remote is included so you can control your cooling from across the room. 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

  • 14,000 BTU ASHRAE/12,000 BTU DOE portable air conditioner
  • 12,000 BTU supplemental heating
  • Features inverter technology for energy efficiency
  • Designed for rooms up to 550 sq ft
  • Dehumidifies up to 5.22 pints per hour
  • 3 fan speeds
  • More energy efficient than average portable units
  • Quieter than regular portable units
  • 5.5-ft. power cord with LCDI plug using standard 115V electrical outlet
  • Return Policy
  • California residents
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Product Information

Internet # 330548250

Model # KSTAP121HINV

Specifications

Dimensions: H 32.480 in, W 19.530 in, D 16.730 in

Dimensions

Product Depth (in.)

16.730 in

Product Height (in.)

32.480 in

Product Width (in.)

19.530 in

Details

Air Conditioner Features

Filter Light Reminder, Inverter, Sleep Mode, Timer

Appliance Category

A/Cs and Fans

BTU Cooling Rating (ASHRAE)

14000 BTU

BTU Cooling Rating (DOE SACC)

12000 BTU

BTU Heat Rating

12000 BTU

Color Family

White

Commercial/Residential

Residential

Coverage Area (Sq.Ft)

550 Sq.Ft

Decibel (Sound) Rating

56 dBA

Filter Type

Mesh

Heater Included

With Heater

Hose Configuration

Single Hose

Included

Casters, Dehumidifier, Remote Control

Moisture removal capacity (pints/day)

5.22

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)

1300

Warranty / Certifications

Certifications and Listings

No Certifications or Listings

Manufacturer Warranty

1 Year

Questions & Answers

Will this work for a 34" wide window?
ByAug 31, 2026
1 Answer | 
Answer This Question

Hello, We recommend contacting Keystone directly at keystonecs@keystone-products.com as they would be best equipped to provide the most accurate information. Thank you!

By|Sep 6, 2026


    Is this product efficient for a greenshuse which is 150 sq. ft?
    ByJul 8, 2026
    1 Answer | 
    Answer This Question

    This unit is designed to cool spaces up to 250 square feet and can remove up to 2.7 pints of moisture per day.

    By|Jul 9, 2026


      Looking for the dimensions of the panel for the window. What size windows does it fit?
      ByMay 4, 2026
      1 Answer | 
      Answer This Question

      Thank you for your question. Please reach out to Keystone customer support at Keystonecs@keystone-products.com for further assistance.

      By|May 7, 2026


        is the heat from hot gas or from an element?
        ByJul 8, 2025
        1 Answer | 
        Answer This Question

        Thank you for your question. Please reach out to our team at Keystonecs@keystone-products.com for assistance.

        By|Jul 8, 2025


          How quiet is this UNit
          ByJul 4, 2025
          1 Answer | 
          Answer This Question

          Thank you for your question. Noise Level (High 56.5//Med 49.5/Low 42.5) Hope it helps. Thank you

          By|Jul 4, 2025


            Does the unit turn off when the set temperature is reached? Is the window kit included?
            ByJul 4, 2025
            1 Answer | 
            Answer This Question

            Thank you for your question. The compressor will turn off once it reaches the set temperature but the fan will continuesly running. The unit will not turn off. Yes, the window kit is included. Hope it helps. Thank you

            By|Jul 4, 2025


              is th window kit and exhaust hose included
              ByJul 4, 2025
              1 Answer | 
              Answer This Question

              Yes, the window kit and the hose are included. Hope it helps. Thank you

              By|Jul 4, 2025


                What size window does this work for? Need window dimensions.
                ByJun 20, 2025
                1 Answer | 
                Answer This Question

                Thank you for your question. Please feel free to contact our team at keystonecs@keystone-products.com to further assist you.

                By|Jun 20, 2025


                  Viewing 1-8 of 12

                  Customer Reviews

                  3.6 out of 5

                  • 3.6 out of 8 reviews
                  • 0% recommend this product
                  Filter by:
                  Showing 1-8 of 8 reviews
                  Love ac/heater
                  [This review was collected as part of a promotion.] It is good enough for our vacay cabin in pocono. Ac and heater and ac both works good and it is very company modern looking design. Goes anywhere..
                  by
                    AMAZING SYSTEM
                    [This review was collected as part of a promotion.] The box that came is HUGE! Make sure you have a good amount of space in your living space to put this! It is very strong! It does both heating and cooling as well as dehumidifying! A room warms/cools fairly quickly and it is AMAZING
                    by
                      Didn’t work with our setup/window. We weren’t able to return it because it was past the 5 day return day. Now we are stuck with something that we can’t use. We still have to find something that will work and pay hundreds more.
                      by
                      Response from Product ExpertApr 30, 2026
                      Thank you for your feedback - we apologize for the inconvenience. Please reach out to our Keystone customer support team at Keystonecs@keystone-products.com if needed further assistance.
                      • Verified Purchase
                      My only complaint is the unit is noisy.
                      by
                      • Verified Purchase
                      This customer chose to rate the product and not provide text.
                      by
                      • Verified Purchase
                      Gets freezing cold. Works well
                      by
                      Response from Product ExpertMay 22, 2025
                      Thank you for your positive feedback. We are pleased to hear that it met your expectations.
                      • Verified Purchase
                      Much bigger than anticipated
                      [This review was collected as part of a promotion.] When I saw mobile AC, I for sure thought that meant it could easily move from room to room without the hassle of being tied to a window. Unfortunately this needs to vent through a window in order to work properly. That might not be a negative for many, but for the tight space we were hoping to use this in (a bedroom), it’s a bit disappointing. As for the actual features. its large size will cool multiple rooms or a very large space quickly. The smart functions are a great bonus! It is heavy and sturdy, making me feel confident this will last a long time. It arrived in a box almost as big as a washing machine! It’s a big machine, with a lot of power! Perfect for the summer heat!
                      by
                        Lot's of water!
                        I've had it less than a week. I have never seen an ac unit produce so much water! The compressor shuts off and runs fan only until it's emptied. Meaning the room never gets a chance to cool down. Running it on dehumidifier fills up a 2 gal pitcher in one hour. (I hooked the hose to outlet valve and just let it run.) Running the air on 75°, I've had to empty the tank every 20 minutes or so. It beeps and compressor turns off when full. I'm in Alabama, I know humidity is high, but dang! It will not turn on compressor until you empty the tank. Returning. I'll settle for a window unit that will empty outside!
                        by
                        Response from Product ExpertApr 29, 2025
                        Thank you for your feedback - we apologize for the inconvenience. Please feel free to contact our team at Keystonecs@keystone-products.com for assistance.
                          Showing 1-8 of 8 reviews

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                          Product Snapshot

                          Ideal for customers who want efficient cooling and heating, ensuring comfort in rooms up to 550 sq. ft.
                          Ideal for customers who want powerful 4-in-1 climate control, ensuring year-round comfort.
                          Ideal for customers who want powerful cooling and heating with smart home features, ensuring year-round comfort and convenience.

                          Cooling Capacity (BTU)

                          12000 BTU DOE SACC
                          16000 BTU
                          12000 BTU

                          Room Size Coverage

                          550 sq. ft.
                          700 sq. ft.
                          600 Sq.Ft

                          Dual-Hose Design

                          Dehumidification Function

                          Smart Controls