HOT ! Keystone - 10,000 BTU Slider/Casement Window AC - KSTSW10B

Keystone - 10,000 BTU Slider/Casement Window AC  -  KSTSW10B

The Keystone 10,000 BTU slider/casement room air conditioner is perfect for cooling your rooms up to 350 sq. ft. Designed specifically for horizontal slider or casement windows this unit is the perfect solution for homes without traditional double-hung windows. 3 fan speeds and a 4-way air direction control means you can quickly cool your room or maintain comfort where needed. The unit also comes with built-in Dehumidification capabilities of removing 0.9 liters per hour. The slide-in/slide-out washable filter removes dust and odors, and with the built-in filter indicator, the unit will let you know when it\'s time to clean. Sleep mode keeps you cool and comfortable without keeping you awake. A programmable timer assures that you can have the unit cool during the hottest parts of the day and the energy-saver mode gives you peace of mind knowing your home is comfortable, without breaking the bank.

Features

• Installs in Horizontal Slider or Casement windows (Does not work for standard double-hung windows)


• 350 Sq. Ft. of cooling coverage keeps your bedroom or office cool


• 3 fan speeds give you control on the amount of cooling in your home


• 4-way air direction control allows you to direct the air where you want it


• Easy to use touch button control panel makes selecting your desired setting a breeze


• Energy Saver mode conserves energy and lowers your environmental impact without impacting your comfort


• Sleep mode let\'s you have a cooling sleep without keeping you awake


• Slide-In/Slide-Out washable mesh filter removes dust and airborne particles from the air


• Check filter indicator lets you know when it\'s time to wash your filter


• Dehumidifies up to 0.9 Liters per hour


• Easy to use installation kit included


• Minimum window height: 21.3\"; Minimum to Maximum window width: 15.5\" - 16.3\"

What our Experts Think

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  Efficient Room Cooling: 10,000 BTU capacity is ideal for medium spaces (~350–450 sq ft) with reliable, even cooling.

  
  


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  Slider/Casement Fit: Designed specifically for slider and casement windows — secure installation and stable operation.

  
  


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  Energy‑Conscious Performance: Balanced cooling output helps reduce runtime and energy costs.

  
  


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  User‑Friendly Controls: Easy‑to‑use settings and adjustable fan speeds for tailored comfort.

  
  


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  Quiet Operation: Engineered airflow and reduced vibration keep noise at comfortable levels.

  
  


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  Low Maintenance: Washable filter and accessible cabinet make cleaning quick.

  
  


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  Good Value: Simple design with dependable performance at an approachable price point.

  
  

Q&A

Q: What type of window does this AC fit?A: Designed for horizontal slider or casement windows (does not fit standard double‑hung windows).

Q: What cooling capacity does it offer?A: 10,000 BTU of cooling — ideal for rooms up to ~450 sq ft.

Q: How many fan speeds does it have?A: 3 fan speeds let you tailor airflow and comfort.

Q: Does it remove humidity?A: Yes — built‑in dehumidification removes up to 1.1 L of moisture per hour.

Q: What comfort modes are included?A: Features Sleep mode for quiet overnight cooling and Energy Saver mode to reduce power use.

Q: Does it come with a remote?A: Yes — includes a remote control for easy temperature and setting adjustments.

Q: How easy is maintenance?A: Slide‑in/slide‑out washable filter with a check‑filter indicator simplifies cleaning.

Q: Is installation hardware included?A: Yes — an installation kit is included for slider/casement window mounting.

Maintenance Tips

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  Clean or rinse the washable air filter every 2–4 weeks to maintain airflow and cooling efficiency

  
  


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  Wipe the front grille and air intake/exhaust vents regularly to prevent dust buildup

  
  


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  Ensure proper window sealing and secure mounting to reduce air leaks and vibration

  
  


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  Check and clear the condensate drain to prevent water buildup and dripping

  
  


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  Use Energy Saver mode and proper thermostat settings to reduce runtime and wear

  
  


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  Keep the area around the unit free of obstructions for optimal ventilation

  
  


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  Schedule an annual professional checkup for coil cleaning and electrical inspection