Best Keystone Air Conditioners in 2026

ULTRA QUIET - The U-shape design of Midea U Smart Inverter AC uses your window to block noise outside. The highly-efficient inverter system warrants ultra-low noise and vibration, 9x quieter than traditional units with operation as low as 32 dBA.

MORE THAN 35% ENERGY SAVINGS - With the advanced DC Inverter technology, Midea U achieves over 35% energy savings compared to other traditional units. It is the first window AC to obtain the ENERGY STAR Most Efficient Certification.

SMART CONTROL - Midea U Smart Inverter AC is Wi-Fi enabled and can be controlled from anywhere using the MSmartHome app on iOS or Android. You can also use voice commands throughout your house, office, or apartment using Alexa or Google Assistant devices.

Reliable Air Conditioning: Keystone proudly produces consistent cooling to provide you comfort even on the hottest days; Our powerful 18,000 BTU window air conditioner is what you need to efficiently cool your apartment, bedroom, garage or any larger sized room up to 1000 Sq.Ft.

Maximum Comfort: Featuring 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers and a programmable timer; Aside from cooling, 3.8 pints of moisture from the air is removed every hour with the efficient built-in dehumidification system

Smart Remote Control: The remote control takes the temperature of the room you are in, displays it on the LCD screen and sends a signal to your AC unit every 3 minutes for accurate cooling, no matter where you are in your home

Reliable Air Conditioning: Keystone proudly produces consistent cooling to provide you comfort even on the hottest days; Our powerful 5,000 BTU window air conditioner is what you need to efficiently cool your apartment, bedroom, garage or any small room up to 150 Sq.Ft.

Maximum Comfort: Featuring 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers and a programmable timer; Aside from cooling, 1.3 pints of moisture from the air is removed every hour with the efficient built-in dehumidification system

Quiet Operation: Perfect for your bedroom or nursery with a low noise level of 49dB which will not disturb the daily routine in your home so you can get a good night's sleep, watch TV peacefully, or work without distraction

Reliable Heat & Cool: Our powerful cooling and heating 8,000 BTU cooling capacity / 4,200 BTU supplemental heating capacity wall unit can efficiently provide comfort all year long for any small to medium sized room in your home up to 350 Sq.Ft..Frequency : 60 hertz

All in One Unit: Enjoy powerful cooling, supplemental heating, dehumidification up to 2.1 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

Space Saving Design: Keep your window view and floor space with this wall-mounted air conditioner; Easy installation with standard universal interior trim kit

Energy Star Rated: With a 10.5 energy efficiency ratio (EER), this 12,000 BTU through the wall air conditioner can effectively cool rooms up to 550 sq. ft and dehumidify up to 2.5 pints per hour. Perfect for medium to large bedrooms, living rooms, basements, bathrooms, or family rooms. (Product is not suitable for window installation).

Smart Remote Control: With a thermostat built into the remote control, it's able to sense the temperature of the room and adjust as needed. The 'Follow Me' remote makes it easier to control the unit from anywhere in the room and its integrated thermostat signals the AC to cool the space based on where you are.

Front Access Filter: Let’s face it. Filters collect dust. With our front-access design, cleaning that dusty filter is a piece of cake. Simply pull it out, vacuum or rinse and dry, and slide back into place for a reliable clean. An easy clean washable and reusable mesh filter makes maintenance hassle free. The unit will alert you through the Check Filter signal when it is time to clean.

【OUTSTANDING COOLING ABILITY】- Shinco powerful ac unit owns a cooling capacity of 10,000 BTU(ASHRAE) / 6,400 BTU(SACC), making it perfect for cooling small to medium-sized spaces up to 300sq.ft with ease and making you can enjoy a comfortable and refreshing environment even in the hottest summer days. The adjustable temperature range of 60℉-86℉ allows you to customize your cooling experience to your liking

【3-in-1 FUNCTION】- This portable air conditioner is designed with a 3-in-1 function that allows you to choose between cool, fan, and dry modes depending on your needs, making it a smart choice for any season. The dehumidification capacity can be up to 36L/day without bucket by self-evaporating operation. You can choose between the 3 fan speeds to get a comfortable feeling

【QUICK INSTALLATION】- Installation is quick and easy with the included exhaust hose and window sealing kit, no extra tools are needed for assembly. Put the sealing kit on the sliding window, and connect the machine and the sealing kit with the 59" telescopic hose, the hot air will be exhausted through the hose during machine operation

2X Faster Cooldown: Being a powerful AC, this unit delivers pleasant chillness to you with 10000 BTU capacity (ASHRAE). Cooling power is adjustable between 60.8~86°F so you can set the most comfortable temperature. Robust fan will serve you if you only want to feel some fresh wind. Dehumidifying function guarantees room with refreshing, light air.

3X More Effective: Designed with ingenuity, the air inlet draws air from three sides at the same time and transform the air into cool, delighting breeze circulate through the room. Increasing air transfer efficiency offers a faster cooling air flow, cooling down the temperature within minutes.

Wide Range Cooling: With 980W rated power and 10000 BTU (ASHRAE) /6000 BTU (DOE) cooling power, the cold air can cover a room of up to 250+ sq. Ft. Air supply distance is 196inch. Wider range of cooling allows you to be comfortable in any position.

2014 Energy Star 11. 2 EER rating

6, 000 BTU air conditioner for window-mounted installation uses standard 115-volt electrical outlet

Cools a room up to 250 sq. ft. with dehumidification up to 1. 5 pints per hour

HEAT/COOL AIR CONDITIONER: 18,500 BTU cooling capacity / 16,000 BTU supplemental heating capacity to effectively cool or heat your apartment, bedroom, living room, or home to the temperature that is right for you.

POWERFUL HEATING OPTION: Supplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 45°F for your convenience. The unit has 3 cooling speeds, 3 fan speeds, and 1 heat speed for multi-seasonal use.

FUNCTIONALITY: Designed for a room up to 1000 sq. ft. with dehumidification up to 3.8 pints per hour. Has an adjustable 4-way air flow direction allows you to easily control the direction of the cool air

Powerful Cooling for Medium Rooms: This Keystone KSTAP05PHA portable air conditioner is best used in medium-sized rooms up to 200 sq. ft, such as apartments, family rooms, living rooms, or dorm rooms. It’s rated as 9,000 BTUs based on the ASHRAE standard and 5,000 BTUs based on the SACC standard.

I Sense temperature sensing and room temperature display button ensures maximum comfort and a room that is always cooled to your liking.

Thoughtful Technology: Our front self-adjustable air flow louvers move air around the room while cooling. Sleep mode gradually increases room temperature, saving you energy and money while you sleep. Auto-restart saves your settings during a power outage and turns the unit back on when power is restored.

❄[FAST EXCELLENT COOLING] - The air cooler features 3 high-density upgraded evaporative cooling pads to increase the evaporative surface area and produce colder air. What’s more, powerful fan motors allow for fast cooling and deliver strongly cool air. With 3 included ice packs, this air cooler further cools down the water for chillier airflow, and effectively reduce temperature.

❄[SUPER AIR VOLUME with LESS ENERGY] - Not let the normal tower fan limit your imagination of this big evaporative cooler fan! 3531 CFM swamp cooler produces can handle spaces of up to 900 square feet, puts out 3531 cubic feet of cold air per minute. In addition, wider oscillation effectively distributes the cold air all throughout the space. This would be an excellent alternative to air conditioners.

❄[10.6 GAL LARGER WATER TANK] - Built-in 10.6 Gal water tank that can keep the evaporative cooling fan cooling for more hours. The large capacity water tank can spray much more cooling wind. What’s more,the intuitive Low-Max water line helps you monitor the water level for timely toppings up. Drainage port at the bottom marked for cleaning make maintenance more convenient.

【Powerful Cooling And Efficient Heating】ASHRAE Cooling capacity 14, 000 BTU (9500 BTU SACC), Heating capacity 11, 000 BTU. Machine has an efficient and powerful compressor that can supply cool air to 700 square feet of space and hot air to 500 square feet of space in your living room, bedroom, apartment and office, whether in hot or cold weather, it can give you a wonderful sense of experience. In addition, you can maintain temperatures from 61°F to 90°F with a variety of controls.

【Get The Air Moving】In order to improve the efficiency of the machine, we designed the air outlet baffle of the machine with automatic swing function, which can make the air outlet baffle swing up and down 80°, which can make the air flow and distribute the cold air evenly to cool your room at the fastest speed, so that you can feel the feeling of wind flow at home and improve your experience.

【LED Digital Display And Full-Function Remote】Our equipment is equipped with an easy-to-read LED display that lets you know the operating status of the machine. In addition, we have also designed an additional temperature display on the front of the machine, which allows you to check the temperature from a distance or from a distance in the dark, and you can control the machine with the remote control in your hand to adjust without getting up from the sofa temperature, function mode and other functions.

{TURBO-BOOSTED PORTABLE COOLING} – This Keystone 10, 000 BTU (ASHRAE) / 6, 000 BTU (DOE) portable air conditioner includes a special Turbo mode that jump-starts the cooling process by running the fan on max speed at the lowest possible temperature setting for 10 minutes.

{ASSEMBLED HOSE CONNECTIONS} – The main struggle of portable air conditioner users is hose assembly. Keystone has designed a hose kit that comes with the connectors already attached and ready to use right out of the box. Click one end into the back of the AC and the other into the included window kit, hit the power button, and enjoy the cool!

{TEMPERATURE SENSING “FOLLOW ME” REMOTE CONTROL} - With a thermostat built into the remote control, say good-bye to uneven room temperatures. Press the iFEEL button to activate the thermostat, which signals the AC to cool the space based on where you are.

Heat/Cool portable air conditioner with dehumidifying function and self-evaporative design

14, 000 Cooling BTUs ASHRAE / 9, 000 Cooling BTUs DOE

11, 000 BTU supplemental heat capability provides an additional heat source for temps above 45°F