

Keystone 8,000 BTU 115-Volt Window Air Conditioner with Heater, White, KSTHW08A
Key item features
- Year-Round Comfort: Reliable 8,000 BTU cooling and 3,500 BTU heating capacity for spaces up to 350 sq. ft.
- Multi-Functional: Combines cooling, heating, dehumidification (1.9 pints/hr), and fan circulation in one unit.
- Smart Remote: I Sense remote control displays room temperature and sends signals to the AC unit for accurate cooling.
- Energy Efficient: Energy Star certified with Energy Saver and Sleep modes to reduce electricity usage.
- Space-Saving Design: Window-mounted with a minimum window height of 16.5 inches and width of 26.8" to 36".
- Convenient Controls: Electronic controls with LED display, 3 cooling speeds, 3 fan speeds, and 1 heat speed.
- Programmable Timer: 24-hour on/off timer for customized cooling schedules.
- Easy Installation: Includes adjustable, pleated window mounting kit and removable chassis for window or wall installation.
Specs
- Btu8000
- Coverage area350 sq ft
- Energy efficiency rating11
- Heating rate3500 BTU
Reviews summary
- : 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.
- : Can be warm and toasty, but may struggle to maintain consistent heat output.
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About this item
Product details
- Reliable Heat & Cool: Our powerful 8,000 BTU cooling capacity / 3,500 BTU supplemental heating capacity wall unit can efficiently provide comfort all year long for your living room, garage, multiple rooms on the same floor - any large space up to 350 Sq.Ft.
- All in One Unit: Enjoy powerful cooling, supplemental heating, dehumidification up to 1.9 pints per hour, and fan circulation all in one compact unit with on-board electronic controls, 3 fan speeds, sleep function, and a programmable 24-hour on/off timer.
- Smart Remote Control: The I Sense remote control takes the temperature of the room you are in, displays it on the remote's LCD screen and sends a signal to your AC unit every 3 minutes for accurate cooling, no matter where you are in your home.
- Powerful Cooling on a Budget: Our Energy Star certified AC will give your electric bill a break by using the 'Energy Saver' or Sleep' mode. These smart features automatically program your unit to use less energy while providing the same amount of comfort.
- Space Saving Design: Save your floor space with this window-mounted air conditioner. Window installation kit included. Minimum window height: 16.5 inches, window width dimensions: 26.8" minimum / 36" maximum
- Heat/Cool air conditioner with removable chassis for window and wall installation
- 8,000 BTU cooling capacity / 3,500 BTU supplemental heating capacity
- Supplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 45°F
- 7-ft. LCDI power cord with NEMA 5-15P plug uses standard 115V electrical outlet
- Designed for a room up to 350 sq. ft. with dehumidification up to 1.9 pints per hour
- Indoor Noise Level dBA (Hi/Med/Lo): 57.2 / 54.9 / 53.4
- 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 4-way air flow direction allows you to easily control the direction of the cool air
- 3 cooling speeds, 3 fan speeds, and 1 heat speed for multi-seasonal use
- Programmable 24-hour on/off timer cools on your schedule
- Energy Saver function conserves energy and saves you money
- Sleep function gradually increases room temperature after being activated
- Easy-clean, tilt-out mesh filter with Check Filter alert on the unit
- Adjustable, pleated window mounting kit included for window installation
- Minimum window height: 16.5 inches
- Window width dimensions: 26.8" minimum / 36" maximum
- U.L. safety listing (SA12388)
Specifications
Btu
Coverage area
Energy efficiency rating
Heating rate
Warranty
Warranty information
Warnings
Warning Text
State Chemical Disclosure
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Customer ratings & reviews
Reviews summary
- : 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.
- : Can be warm and toasty, but may struggle to maintain consistent heat output.
Customer images






+1 image
Showing 1-3 of 68 reviews
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.
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.
Thank you for your positive feedback. We are pleased to hear that it met your expectations.
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.
Thank you for your positive feedback. We are pleased to hear that it met your expectations.
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