HOT ! Keystone - 12000 BTU Through the Wall Air Conditioner EStar 230 - KSTAT12-2D

Keystone - 12000 BTU Through the Wall Air Conditioner EStar 230  -  KSTAT12-2D

The Keystone 12,000 BTU 230V through-the-wall air conditioner with Follow Me remote control is perfect for cooling a room up to 550 square feet. It has electronic controls with LED display and a temperature sensing LCD remote control allowing you to conveniently see, set and maintain the room temperature from across the room. Money saving features include energy saver mode, sleep mode and a programmable 24-hour timer. This unit is designed for through-the-wall installation and is not designed for standard window installation (WALL SLEEVE SOLD SEPARATELY). This unit also requires a special 230-volt/20-amp electrical outlet and will not operate with a standard 115V household electrical outlet.

Features

• 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.


• Custom Cooling: While there are 3 cooling modes and 3 fan speeds pre-programmed, you have flexibility. The Auto option will automatically ramp up and down the fan speed to keep you’re pre-set temperature constant. The Energy-saver mode conserves energy and saves you money by turning off the compressor once your desired temperature is reached. This AC unit is ideal for climate control in your home, apartment, bedroom, or living room.


• Universal Fit: This air conditioner will fit in your existing 24. 5” to 27” durable sleeve. We guarantee it. At 20. 3” D x 24. 2” W x 14. 5” H, we provide the foam seals and installation kit necessary to retrofit your existing sleeve. If you don’t have a sleeve, the matching Keystone KSTSLV1 is also available for purchase (sold separately), which allows for an easy, sturdy installation. Special 230-volt/20-amp electrical outlet required (Unit will not work with a standard 115V outlet)


• ENERGY-CONSCIOUS OPTIONS: While there are 3 cooling modes and 3 fan speeds pre-programmed, you have flexibility. The Auto option will automatically ramp up and down the fan speed to keep you’re pre-set temperature constant. The Energy-saver mode conserves energy and saves you money by turning off the compressor once your desired temperature is reached.


• 2016 Energy Star: 10.5 Energy Efficiency Ratio (EER)


• 12,000 BTU air conditioner for 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)


• Special 230-volt/20-amp electrical outlet required (Unit will not work with a standard 115V outlet)


• Cools a room up to 550 sq. ft. with dehumidification up to 2.5 pints per hour


• 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, plus Auto Cool for cooling flexibility


• Programmable 24-hour on/off timer cools on your schedule


• Energy-saver mode conserves energy and saves you money


• Sleep mode gradually increases room temperature after being activated


• Easy-clean mesh filter with Check Filter alert on the unit


• 6.5 ft. power cord with NEMA 6-15P grounding plug makes extension cords unnecessary


• U.L. safety listing

Specifications

Downloads & Manual

• Specification Sheet


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  Product Manual
  


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  Installation Guide
  


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  Warranty Guide
  


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  Energy Guide
  


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  CA Prop 65 Warning Label
  


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  CA Prop 65 Retail POP
  


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  Product Video
  


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  Custom Spec Sheet
  

What our Experts Think

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  Ideal for Medium Rooms: 12,000 BTU cooling capacity efficiently handles spaces ~450–550 sq ft—perfect for living rooms, bedrooms, offices.

  
  


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  Energy-Smart Performance: ENERGY STAR® rated for lower operating costs and reduced environmental impact.

  
  


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  Reliable Through-the-Wall Design: Permanent installation maximizes space, reduces noise, and improves airflow vs window units.

  
  


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  Easy Controls & Convenience: Intuitive digital thermostat and remote deliver precise temperature management.

  
  


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  Durability & Value: Sturdy build quality with dependable performance makes it a cost-effective cooling solution.

  
  


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  Strong Airflow & Comfort: Fast, consistent cooling with multiple fan speeds for customizable comfort.

  
  


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  Low-Maintenance: Washable filter and simple service access help keep upkeep minimal.

  
  

Q&A

Q: What room size does this AC unit cool?A: Designed to efficiently cool rooms up to 550–700 sq. ft., ideal for living rooms, bedrooms, offices, and medium-large spaces.

Q: How powerful is the cooling capacity?A: With 12,000 BTU cooling capacity, it delivers strong performance for steady, balanced temperature control.

Q: Is installation included?A: This is a through-the-wall unit — hardware and template included for secure installation in wall sleeves or framed openings.

Q: What features improve comfort?A: Multi-speed fan settings, adjustable thermostat, remote control, and easy-use electronic controls for personalized cooling.

Q: Does it offer quiet operation?A: Yes, engineered for low-noise operation, making it suitable for bedrooms and quiet environments.

Q: Is it durable and reliable?A: Built with a rugged design for long-lasting use in residential or light commercial spaces.

Maintenance Tips

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  Clean the washable air filter every 2–4 weeks to maintain airflow and energy efficiency

  
  


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  Wipe exterior vents and front grille regularly to prevent dust buildup and overheating

  
  


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  Check wall sleeve seals and drainage to avoid air leaks and moisture issues

  
  


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  Use Energy Saver and Timer modes to reduce wear and lower electricity use

  
  


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  Keep the area behind the unit clear for proper ventilation

  
  


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  Schedule an annual professional inspection to clean coils and check electrical components