Early Black Friday DealsNew Doorbusters through SundayShop now

Skip to content
Main Content
product image

Keystone - 450 sq ft BTU Slider/Casement Window Air Conditioner - White

Model: KSTSW10A
SKU: 6421567
This item is no longer available in new condition. See similar items below
  • Key Specs
    • Recommended Room Size: 450 square feet (The recommended area size in which the product is designed to operate and produce optimal results, such as the desired heating or cooling. Generally, running a unit too big or too small for the space will result in ineffective operation and wasted energy.)
    • BTU Cooling Rating: 10000 british thermal units (The amount of BTUs (British Thermal Units) per hour the unit uses to cool the air, also known as cooling capacity. For best results, the capacity of the unit should be based on the size of the area it is intended to cool. For example, a 5,000 BTU capacity works optimally for a 150 square foot room. In general, an oversized unit will not effectively remove humidity, and an undersized unit will not cool the space efficiently.)
    • Number of Cool Settings: 3
    • Number of Fan Speeds: 3
    • Airflow Rate: 200 cubic feet per minute
    • Remote Control: false
    • Integrated Heater: false
    • Sleep Mode: true (Enabling this mode sets the unit to first reach the desired temperature, then gradually increase the temperature over a period of time until it reaches a new set temperature, typically several degrees higher than the initial cool setting. This mode helps save energy while keeping the room comfortable.)
    • Timer: false
    • Auto Shut-Off: false (Feature automatically turns off the product.)
    • Energy Efficiency Ratio: 10.8 (The ratio of output BTUs (British Thermal Units) to input electrical energy (watts) at a given operating point. Generally, the higher the number, the more efficient the unit. Though higher efficiency units are typically more expensive upfront, they may offset the price in energy costs over time.)
    • Combined Energy Efficiency Ratio (CEER): 10.4 (The standard used to measure energy efficiency in window and room air conditioners by the Department of Energy (DOE) as of June of 2014. CEER measures the ratio of output BTUs (British Thermal Units) to input electrical energy (watts) in standby mode and while the unit is operating. Generally, the higher the number, the more efficient the unit. Though higher efficiency units are typically more expensive upfront, they may offset the price in energy costs over time.)
    • App Compatible: false (The product can be connected to a program or software application on a mobile device, which then receives collected data from the product.)
    • Window Mounting Kit Included: true
    • Air Conditioner Type: Window
  • General
    • Brand: Keystone
    • Model Number: KSTSW10A
    • Product Name: 450 sq ft BTU Slider/Casement Window Air Conditioner
    • Color: White
    • Air Conditioner Type: Window
  • Dimensions
    • Minimum Window Opening Height: 21.3 inches
    • Minimum Window Opening Width: 15.5 inches
    • Maximum Window Opening Height: 50 inches
    • Maximum Window Opening Width: 50 inches
    • Product Height: 14.57 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
    • Product Width: 20.87 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
    • Product Depth: 23.50 inches (The out of box depth of the item. Depth is measured as the distance from the front of the item to the back as it would be primarily used or placed.)
    • Product Weight: 34.9 pounds (The out of box weight of the item.)
    • Cord Length: 7 inches
  • BTU Rating
    • Recommended Room Size: 450 square feet (The recommended area size in which the product is designed to operate and produce optimal results, such as the desired heating or cooling. Generally, running a unit too big or too small for the space will result in ineffective operation and wasted energy.)
    • BTU Cooling Rating: 10000 british thermal units (The amount of BTUs (British Thermal Units) per hour the unit uses to cool the air, also known as cooling capacity. For best results, the capacity of the unit should be based on the size of the area it is intended to cool. For example, a 5,000 BTU capacity works optimally for a 150 square foot room. In general, an oversized unit will not effectively remove humidity, and an undersized unit will not cool the space efficiently.)
  • Features
    • Number of Cool Settings: 3
    • Number of Fan Speeds: 3
    • Airflow Rate: 200 cubic feet per minute
    • Maximum Noise Level: 60 decibels adjusted
    • Air Direction/Circulation: 4-way
    • Moisture Removal Capacity: 1.1 pints per day (The amount of moisture removed from the air over 24 hours. The suggested moisture removal capacity is based on a room's square footage and how damp it is. For example, a 30-pint capacity unit typically works for rooms up to 1,500 square feet.)
    • Remote Control: false
    • Control Type: Button
    • Display Type: None
    • Integrated Heater: false
    • Filter Type: Washable, Mesh
    • Sleep Mode: true (Enabling this mode sets the unit to first reach the desired temperature, then gradually increase the temperature over a period of time until it reaches a new set temperature, typically several degrees higher than the initial cool setting. This mode helps save energy while keeping the room comfortable.)
    • Timer: false
    • Auto Shut-Off: false (Feature automatically turns off the product.)
  • Power
    • Energy Efficiency Ratio: 10.8 (The ratio of output BTUs (British Thermal Units) to input electrical energy (watts) at a given operating point. Generally, the higher the number, the more efficient the unit. Though higher efficiency units are typically more expensive upfront, they may offset the price in energy costs over time.)
    • Combined Energy Efficiency Ratio (CEER): 10.4 (The standard used to measure energy efficiency in window and room air conditioners by the Department of Energy (DOE) as of June of 2014. CEER measures the ratio of output BTUs (British Thermal Units) to input electrical energy (watts) in standby mode and while the unit is operating. Generally, the higher the number, the more efficient the unit. Though higher efficiency units are typically more expensive upfront, they may offset the price in energy costs over time.)
    • Voltage Requirement: 115
    • Amperage: 10 amperes (Strength of electrical current.)
    • Estimated Annual Electricity Use: 12.1 kilowatt hours (Predicted amount of electricity needed to operate the product under average conditions for one year.)
  • Certifications Listings & Approvals
    • ENERGY STAR Certified: false (Devices carrying the ENERGY STAR service mark, such as computer products and peripherals, kitchen appliances, and other products, generally use 20% to 30% less energy than required by federal standards.)
  • Compatibility
    • App Compatible: false (The product can be connected to a program or software application on a mobile device, which then receives collected data from the product.)
  • Included
    • Window Mounting Kit Included: true
  • Other
    • UPC: 192487246764

The Keystone 10,000 BTU slider/casement room air conditioner is perfect for cooling your rooms up to 450 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 1.1 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.

    Whats Included
    • air conditioner
    • remote
    • 2 AAA batteries
    • mesh filter
    • window install kit
    • manual
    • warranty
    Documents
    • Energy_Guide_PDF

    Q: How much does the air conditioner weigh?

    A: Hello, This air conditioning unit itself weighs 35 lbs. (Shipping Weight: 40) Thank you

    Q: Can I used a standard outlet

    A: Yes, this AC uses a standard outlet.

    Q: How much does this weigh? Someone else answered 35 pounds but that doesn’t seem right?

    A: I just weighed mine on the bathroom scale & it tops in at 72.8 pounds. If it had only weighed 35, it would be in the window now.