Keystone 18,000 BTU 230-Volt Window Air Conditioner with Heater, White, KSTHW18A
Keystone 18,000 BTU 230-Volt Window Air Conditioner with Heater, White, KSTHW18A
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Keystone 18,000 BTU 230-Volt Window Air Conditioner with Heater, White, KSTHW18A

3.8 stars out of 137 reviews
(3.8)|
137 ratings
Keystone 18,000 BTU 230-Volt Window Air Conditioner with Heater, White, KSTHW18AKeystone 18 000 BTU 230 Volt Window Air Conditioner with Heater White KSTHW18AKeystone 25 000 24 700 BTU 230V Window Wall Air Conditioner with 16 000 BTU Supplemental Heat CapabilityKeystone 8 000 BTU 115 Volt Window Air Conditioner with Heater White KSTHW08A
Size:18000 BTU-Out of stock

Key item features

  • Year-Round Comfort: Reliable 18,000 BTU cooling and 16,000 BTU heating capacity for spaces up to 1,000 sq. ft.
  • All-in-One Functionality: Combines cooling, heating, dehumidification (3.8 pints/hr), and fan circulation with electronic controls and a 24-hour timer.
  • Smart Remote Control: I Sense remote measures room temperature and adjusts the AC unit for precise cooling.
  • Energy Efficient: Energy Star certified with Energy Saver and Sleep modes to reduce electricity usage.
  • Space-Saving Design: Window-mounted unit with included installation kit; fits windows 28" to 40.5" wide and at least 18.5" high.
  • Versatile Installation: Removable chassis for window or wall installation; requires a special 230-volt/25-amp outlet.
  • Convenient Features: Auto-restart, adjustable 4-way airflow, 3 cooling speeds, 3 fan speeds, and 1 heat speed for multi-seasonal use.
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Current price is $559.99
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Out of stock

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Customer ratings & reviews

3.8 out of 5 stars
stars137 ratings70 reviews
How item rating is calculated
  1. 5 stars55% (76)
  2. 4 stars12% (17)
  3. 3 stars7% (9)
  4. 2 stars4% (6)
  5. 1 star21% (29)

Reviews summary

Pros
  • : Cools large spaces efficiently.
  • : Comes with a remote for easy operation.
  • : Offers good value at this cost.
  • : Keeps the place cool and dehumidified during this season.
Neutral
  • : Can be warm and toasty, but may struggle to maintain consistent heat output.
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Showing 1-3 of 70 reviews

Oct 24, 2025
Walmart customer
Top Reviewer
Item details
Size: 8000 BTU
5 out of 5 stars review

Verified Purchase

It's An Air Conditioner With Heat!

The ac works just fine and I like the fact that it cycles and both the cold and the heat work. It is being used in a small room for the time being and the temp is set to 74 and it seems to be keeping that temp with no problem. It's a little louder than I would like, but it works and that is what counts. One thing that I want to mention. When I installed it and started using it a smell came out of it like it had been in storage for some time. It was an old type smell. Filled the room. I had to use frebreeze to knock it out and I ended up spraying the coils on the ac to help knock out that smell. It seems to have worked. No more smell.

Helpful?4ILEIS82PI1T251266281
Sep 18, 2023
kathryn
Item details
Size: 8000 BTU
5 out of 5 stars review

Verified Purchase

Worth the money

This was bought for my son's room that I added on. He has used this unit now for a couple of weeks. It has had no problem cooling 230sf. I haven't been able to tell much of a change in my electric bill since using this as well. Seems to be very energy efficient. I will update review when we use the heat. So far it has been worth the purchase.

Helpful?4ILEIS82PI1T251266281
reply from Product Expert

Thank you for your positive feedback. We are pleased to hear that it met your expectations.

Aug 25, 2020
Yolanda
Item details
Size: 18000 BTU
5 out of 5 stars review

Verified Purchase

Ac unit

Finally up and running. I wasn't aware that it was a 220. I had to have a 220 plug installed before I was able to use it. Cools my large room very well. Love that's it's both air and heat.

Helpful?4ILEIS82PI1T251266281
reply from Product Expert

Thank you for your positive feedback. We are pleased to hear that it met your expectations.