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Keystone 18,800 BTU Window-Wall Air Conditioner with 16,000 BTU Supplemental Heating, 230V, Window and Wall AC Unit for Living Room, Apartment, Large Rooms up to 1000 Sq.Ft.

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Availability: Only 5 left in stock, order soon!
Fulfilled by Sparks_Fly

Arrives Thursday, Nov 13
Order within 9 hours and 2 minutes
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Size: 18000 BTU


Style: 230V


Color: Bright White


Features

  • Reliable Window AC Units: Our powerful 18,000 BTU cooling capacity / 16,000 BTU supplemental heating capacity window air conditioners can efficiently provide comfort all year long for any large space up to 1,000 Sq.Ft.
  • All in One Window Unit Air Conditioners: Enjoy cooling, supplemental heating, dehumidification, and fan circulation; Supplemental Heating mode is meant to be operated when temperatures outside are between 23 and 76 degrees; Mode is supplemental and NOT meant as primary heat source
  • Smart Remote: The I Sense remote takes the temperature of the room you are in, displays it on the remote's LCD screen and sends a signal to your window air conditioner with remote control every 3 minutes for accurate cooling
  • Powerful Cooling on a Budget: Our High Efficiency air conditioner window unit will give your electric bill a break by using the 'Energy Saver' or 'Sleep' mode
  • Space Saving Design: Save your floor space with this air conditioner for windows; Window installation kit included

Description

With reliable air conditioning, Keystone produces consistent cooling to keep you comfortable, even on the hottest days. Whether installed in a window or through-the-wall, this 18,000 BTU / 16,000 BTU supplemental heating capacity air conditioning unit can effectively cool rooms up to 1000 square feet with dehumidification up to 3.8 pints per hour. Supplemental Heating mode is meant to be operated when temperatures outside are between 23 and 76 degrees. This mode is supplemental and NOT meant as a primary heat source. The unit features a unique remote with a thermostat built in to sense the temperature of the room, displays it on the remote's LCD screen, and sends a signal to your AC unit every 3 minutes for accurate cooling. You'll know when it's time to 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 at a cost- conscious price. For wall installation, you can use an existing compatible wall sleeve or purchase one separately. Wall sleeve not included with unit. It is important to have a special 230-volt/25-amp electrical outlet for optimal operation, as this unit does not function with standard 115V household outlets.

Brand: Keystone


Capacity: 3.8 Pints


Cooling Power: 18800 British Thermal Units


Special Feature: 4 Way Swing, Dehumidifier, Filter Light Reminder, Heating And Cooling Function, Remote Controlled


Product Dimensions: 25.39"D x 23.62"W x 17.91"H


BEE Star Rating: No


Start year: 2023


Seasonal Energy Efficiency Ratio (SEER): 10.7


Color: Bright White


Voltage: 230 Volts


Product Dimensions: 25.39 x 23.62 x 17.91 inches


Item Weight: 117.3 pounds


Manufacturer: Keystone


Item model number: KSTHW18B


Form Factor: Window/Wall


Warranty Description: 1-year parts and labor, plus additional 4 years for sealed system


Batteries required: No


Included Components: ac, remote, batteries, mesh air filter, window installation kit


Capacity: 3.8 Pints


Floor Area: 1000 Square Feet


Voltage: 230 Volts


Noise Level: 55 Decibels


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Nov 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • 18,000 BTU heat and air conditioner,built in wall unit.
Size: 18000 BTU Style: 230V Color: Bright White
This is a very good air conditioner and easy to install, a very fair price and this unit also has built in heating, I would recommend this unit to anyone looking for a good quality heating and cooling system, it is so much quieter than the unit that I was using and it has a remote control which is very helpful due to where I had to install this unit. ... show more
Reviewed in the United States on June 29, 2025 by Robbin S.

  • Uses 6-30 NEMA plug!
Size: 18000 BTU Style: 230V Color: Bright White
This product is excellent, it works very well! I bought this to replace my old Keystone air conditioner which was 17,700 BTU. It was really easy to install because it uses the same cage-type frame, so all I had to do was pull out the old one and slide this one in. One thing that I would note is that because this product offers heating, this uses a 6-30 NEMA plug instead of the 6-15 NEMA plug that these types of air conditioners normally use. I had to replace my outlet to accommodate this, but if you don't have an available 30amp breaker, this could end up being a big problem. Definitely something to consider, but the product works well and I definitely recommend it! ... show more
Reviewed in the United States on June 8, 2025 by Miranda Miranda

  • Rattles and screws do not fit to attach side panels
I installed the AC unit in the late spring 2024, despite purchasing it in 2023. The top and side panel screws are not compatible in length and width with the top rail or side panels. Therefor the panels and top rail cannot be attached with their hardware. After running for a couple months, the unit does cool well, the sound is louder than I expected, but most annoying is the metal rattling when the AC comes on. It is becoming annoying to the point that I am thinking of replacing the entire unit. Value for money at this price is not good, if I have to replace it because it rattles too much. It is an internal rattle not due to being in the window or otherwise. ... show more
Reviewed in the United States on August 1, 2024 by Mike

  • Heats and cools fine, loud, has weird on/off cycles
Size: 23200 BTU Style: 230V Color: Bright White
We’ve been using this in our “tiny home” for 6months while we are building our house. The heat and cooling both are great, it’s really loud though!! It kicks on for a few minutes for like a “warm up” (on both heat and cooling) then shuts off for a few seconds and kicks back on for the duration. Not sure why. Installing was easy as any window/wall unit is. It an ok value for the cost. Just alit louder than most. ... show more
Reviewed in the United States on July 22, 2025 by Amanda Cox

  • Cool & Happy in Arizona!
Size: 23200 BTU Style: 230V Color: Bright White
I had one of the new fangled double inverter A/C units, I’m in Arizona and that broke in 16 days I think. This is not as efficient supposedly as that one, but this one has lasted far longer than that. I’m hoping for 5 or 6 years at least. It has only been around 5 weeks. So I’m in Az in the extreme heat summer, my house is cool. The A/C cycles on and off. My electric bill is not bad at all. I am very happy so far! ... show more
Reviewed in the United States on July 31, 2025 by Popeye

  • Great init
Size: 23200 BTU Style: 230V Color: Bright White
We have this in our extra family room. It does a great job. Our HVAC went out and for a week solid this unit kept our entire 2200 sq ft cool enough to sleep. We are very pleased
Reviewed in the United States on July 3, 2025 by Jule

  • Works great!
Size: 23200 BTU Style: 230V Color: Bright White
We put it near the middle of our 3 bedroom 2 bath house and it cools it well.
Reviewed in the United States on June 30, 2025 by Rose

  • Do not buy waste of money
Size: 18000 BTU Style: 230V Color: Bright White
Not only did I have to spend time and money to get new receptacle put in because the plug is not US plug compatible. But it only has one job, one room to cool off and I can’t even do that. I’m disabled and unable to just get up and go shopping and buy a fan or whatever so I spent all this money on this stupid air conditioner just to sit here and die in the Louisiana heat. I’m not impressed. The quality of this product is crap. There is no value for the money because it doesn’t work right. You can’t adjust the vent to blow the air down and I seriously feel like I’m about to die in here it’s so freaking hot. ... show more
Reviewed in the United States on August 17, 2025 by Kitten Mayard

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