
Stay cool and comfortable in your home with the reliable Keystone window and wall-mounted air conditioner. This modern 12,000 BTU unit effectively cools rooms up to 550 square feet, while the 10,000 BTU heat pump provides additional warmth on chilly days. Utilizing innovative Inverter technology, it optimizes energy usage and operates 41% quieter than standard units. With a remote control, energy saver mode, sleep mode, and a programmable 24-hour timer, this air conditioner offers convenient and money-saving features. The Check Filter alert reminds you to maintain the washable filter for efficient operation. With a 1-year warranty, Keystone ensures you experience consistent cooling and heating at an affordable price. Also featuring supplemental heating mode, this unit is designed to keep you comfortable throughout the year, offering peace of mind and the ultimate in home comfort.
Q: What is the minimum window opening height required for installation?
A: The minimum window opening height required for installation is 14.5 inches.
Q: Does this air conditioner have a timer?
A: Yes, this air conditioner features a programmable 24-hour timer.
Q: Why is this air conditioner quieter than standard units?
A: This air conditioner is quieter than standard units due to its Inverter technology, which optimizes energy usage and reduces noise levels.
Q: What is the maximum room size this air conditioner can cool?
A: This air conditioner can effectively cool rooms up to 550 square feet.
Q: What is the cooling power of this Keystone air conditioner?
A: This Keystone air conditioner has a cooling power of 12,000 BTUs.
Q: How is this air conditioner installed?
A: This air conditioner is designed for easy installation in windows with a minimum width of 24 inches and a maximum width of 38.5 inches.
Q: How does the filter alert work on this air conditioner?
A: The air conditioner has a 'Check Filter' alert that reminds you when the washable filter needs to be cleaned.
Q: How much can this air conditioner dehumidify?
A: This air conditioner can dehumidify up to 1.73 pints per hour.

Stay cool and comfortable in your home with the reliable Keystone window and wall-mounted air conditioner. This modern 12,000 BTU unit effectively cools rooms up to 550 square feet, while the 10,000 BTU heat pump provides additional warmth on chilly days. Utilizing innovative Inverter technology, it optimizes energy usage and operates 41% quieter than standard units. With a remote control, energy saver mode, sleep mode, and a programmable 24-hour timer, this air conditioner offers convenient and money-saving features. The Check Filter alert reminds you to maintain the washable filter for efficient operation. With a 1-year warranty, Keystone ensures you experience consistent cooling and heating at an affordable price. Also featuring supplemental heating mode, this unit is designed to keep you comfortable throughout the year, offering peace of mind and the ultimate in home comfort.

With reliable air conditioning units, Keystone produces consistent cooling to keep you comfortable, even on the hottest days. This 12,000 BTU window-mounted air conditioner can effectively cool rooms up to 550 square feet with dehumidification up to 1.85 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. 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.

The LW1223HRSM is the ultimate SMART solution for maintaining a comfortable indoor environment. With LG ThinQ technology, you can easily control your air conditioner using your smartphone or through voice commands with Amazon Alexa and Hey Google. This air conditioner is designed to cool medium rooms up to 570 sq. ft. and even provides supplemental heat to keep you warm on cooler days. Featuring 2 cooling and fan speeds, along with a 24-hour timer, you can create the perfect cooling schedule to suit your preferences. The 4-way air deflection feature allows for precise airflow direction whether for cooling, heating, or just circulating air to improve indoor air quality. In case of a power outage, the auto restart feature ensures that your unit resumes operation automatically once power is restored. The LW1223HRSM also comes with a remote control for added convenience, an easy window installation kit, a removable, washable filter, and a check filter alert that lets you know when it's time to clean the filter. Overall, with its advanced features, powerful performance, and SMART capabilities, the LW1223HRSM is the perfect choice for those seeking a versatile and technologically advanced air conditioning solution for their indoor spaces.

Discover the ultimate in home comfort with Keystone's modern window and wall-mount air conditioner, designed for easy installation and powerful cooling in large rooms up to 1000 square feet. This coldest 18,000 BTU window AC unit not only provides efficient cooling but also boasts a dehumidification rate of 3.8 pints per hour, ensuring a dry and comfortable living space. Equipped with a quiet operation and a remote control with a built-in thermostat, this energy-efficient window AC unit offers personalized comfort that adapts to your needs. Enjoy energy savings with features like the energy saver mode, sleep mode, and a convenient programmable 24-hour timer, allowing you to customize your cooling preferences and optimize energy consumption according to your schedule. With a Check Filter alert for easy maintenance and a 1-year warranty for peace of mind, Keystone's window-mounted AC unit ensures reliable performance and efficient airflow. Stay cool all summer long with Keystone's best-in-class window AC units for home. (Please note: Requires a special 230V electrical outlet)
| Pros for Keystone - 550 Sq. Ft 12,000 BTU Window Mounted Inverter Air Conditioner with 10,000 BTU Heater with Supplemental Heat - White | |||
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| There were no pros for this product— | There were no pros for this product— |
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Arrived on time with no damage, and works great, cools the room real nicely and the Sleep features have been handy. However, worth mentioning that I obtained this AC at a discount that rounded the final price to 618 approximately so my value for this may vary.
Posted by CDDR
This unit was purchased to help cool off 300 sqft of upstairs of an almost century old home with poor central ac to the top unit. It is far exceeding that capability and effectively and easily cooling over 700 sq ft. Inverters are the way to go for quick efficent cooling!
Posted by JBilla
This unit is quiet, energy efficient, and is a legit heat pump heater as well as an air conditioner. The only caveat is that it will not start heating if the outside temperature is less than 41 degrees Fahrenheit. This is perfect if you are in a southern state where temperatures do not approach freezing even during winter. Super-efficient as a heater during the winter.
Posted by KenG
