
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.

Keep your home cool and comfortable during the hottest summer days with the Keystone 12,000 BTU window and wall-mounted air conditioner, the best energy-efficient and quiet window AC unit for your home. With three fan speeds, the coldest AC unit allows you to customize your cooling preferences, while the 24-hour programmable timer lets you set it and forget it. Enjoy easy controls from the comfort of your couch with the Window AC with remote control. The easy install air conditioner is perfect for window air conditioner units for home, and the modern AC unit with a sleek design adds an extra level of style to your space. Designed for large room air conditioners of up to 550 sq. ft., this energy efficient window AC removes up to 3.8 pints of moisture per hour with built-in dehumidification capabilities, ensuring that your space stays comfortable and healthy. Get perfect cooling performance from a quiet AC unit with the Keystone window air conditioner, the best option for those seeking a high-quality, reliable, and easy-to-use air conditioner.

The Windmill AC with WhisperTech Inverter Technology is an efficient, quiet, eco-friendly and smart window air conditioner built for today's needs. Award winning WhisperTech Inverter Technology saves up to 40% on energy cost, faster cooling, Quiet Operation (9x quieter than traditional units). With curved edges, clean lines, and a low-profile look, Windmill is designed to blend right into your home. The small-sized 12,000 BTU unit cools spaces up to 550 square feet. And comes with the install kit pre-assembled for a fast and easy setup.
| Pros for Keystone - 550 Sq. Ft 12,000 BTU Window Mounted Inverter Air Conditioner with 10,000 BTU Supplemental Heat Function - White | |||
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| Cooling Performance | There were no pros for this product— | Cooling Performance | Cooling Performance, Noise Level, Installation Ease, Appearance, Design |
Customers admire the 550 Sq. Ft 12,000 BTU Window Mounted Inverter Air Conditioner with 10,000 BTU Heater with Supplemental Heat for its cooling performance. Customers report that it cools rooms effectively.
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.
CDDR Posted
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!
JBilla Posted
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.
KenG Posted