Stay cool and comfortable with Keystone's reliable air conditioning units, designed to provide consistent cooling even on scorching hot days. This 8,000 BTU air conditioner also offers supplemental heating capacity of 4,200 BTU, making it a versatile choice for year-round temperature control. With an effortless through-the-wall installation process, this unit efficiently cools rooms up to 350 square feet and removes up to 2.1 pints of moisture per hour, improving air quality. Perfect for smaller living spaces such as apartments, dorm rooms, sheds, and more, this unit offers a supplemental heating mode. It should be used when the temperature outside is between 23 and 76 degrees and is meant to supplement, not replace, a primary heat source. The unique remote control features a built-in thermostat that senses the room temperature, displaying it on the remote's LCD screen, and sends a signal to the AC unit every 3 minutes for accurate cooling. The energy-saving features, including the energy saver mode, sleep mode, and programmable 24-hour timer, help reduce electricity costs by optimizing efficiency. The Check Filter alert lets you know when it's time to clean the mesh filter, ensuring consistent performance.

• Through-the-wall installation (Not suitable for window installation)
• Standard, universal interior trim kit for existing wall sleeve included (New wall sleeve sold separately: KSTSLV1)
• 8,000 BTU cooling capacity / 4,200 BTU supplemental heating capacity
• Supplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 45°F
• Heating mode is supplemental and NOT meant as primary heat source
• Designed for a room up to 350 sq. ft.