Keystone - 8,000 BTU Slider/Casement Window Air Conditioner, R32Slider/Casement - KSTSW08B
Stay cool and comfortable with the Keystone 8,000 BTU Slider/Casement Room Air Conditioner, designed for rooms up to 350 sq. ft. Perfect for apartments, bedrooms, or home offices, this unit fits horizontal slider or casement windows, offering versatile cooling solutions. With 3 fan speeds and 4-way air direction control, you can customize your comfort. Enjoy maximum comfort with 3 cooling modes and efficient built-in dehumidification, removing 0.9 liters of moisture per hour. Energy-saving features like Energy Saver and Sleep mode ensure comfort without breaking the bank. Now available for purchase on Appliance Guys, with lifetime phone support, open 7 days per week, and a price match guarantee.
Features
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Convenient Cooling: Fits standard sliding and casement windows, perfect for various living spaces.
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Maximum Comfort: Offers 3 cooling modes, 3 fan speeds, and 4-way adjustable air louvers.
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Control Your Comfort: 4-way air direction control for personalized cooling.
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Powerful Cooling on a Budget: Energy-saving modes for reduced electricity consumption.
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Easy to Use: Touch button control panel and slide-in/slide-out washable mesh filter for convenience.
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Lifetime Phone Support: Accessible assistance for the lifetime of the appliance.
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Open 7 Days a Week: Customer service available every day for added convenience.
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Price Match Guarantee: Ensures you get the best deal.
Specifications
| Brand |
Keystone |
| Model Number |
KSTSW08B |
| Category |
Air Conditioners / Slider / Casement |
| Shipping Weight |
35.5 lbs |
| UPC Code |
840148724174 |
| Country of Origin |
US – United States |
Downloads & Manual
What our Experts Think
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Perfect for Slider/Casement Windows: Tailored fit for slider and casement openings — a strong match for slider window AC search intent.
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8,000 BTU Cooling Power: Ideal for small rooms up to ~350 sq ft, aligning with high‑traffic queries like best 8,000 BTU AC.
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Eco‑Friendly R32 Refrigerant: Modern low‑GWP refrigerant boosts efficiency and appeals to eco‑friendly air conditioner SEO.
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Energy‑Efficient Operation: Helps lower utility costs — relevant for efficient AC unit searches.
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Simple Install & Use: Easy slide‑in setup improves user experience and supports easy install AC search terms.
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Quiet Performance: Low‑noise cooling enhances comfort and search relevance for quiet window AC.
Q&A
Q: What type of windows does it fit?
A: The Keystone KSTSW08B is designed specifically for horizontal slider or casement windows and won’t fit standard double‑hung windows.
Q: What room size is it suitable for?
A: It efficiently cools rooms up to ~350 sq ft, ideal for bedrooms, offices, or medium living spaces.
Q: What cooling features does it have?
A: It includes 3 fan speeds, 4‑way adjustable airflow, energy saver mode, and sleep mode for customized and cost‑efficient cooling.
Q: Does it include a remote control?
A: Yes — it comes with a remote control for easy temperature and setting adjustments.
Q: How does it handle humidity?
A: The unit dehumidifies up to ~0.9 liters per hour, helping improve indoor comfort.
Q: What refrigerant and power requirements does it use?
A: It runs on 115 V and uses R32 refrigerant for efficient cooling performance.
Q: How easy is maintenance?
A: A slide‑in/slide‑out washable filter with a check‑filter indicator makes cleaning effortless.
Q: Does it have a timer?
A: Yes — a programmable timer lets you schedule cooling when you need it most.
Maintenance Tips
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Clean the washable air filter every 30 days to maintain airflow and cooling efficiency
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Vacuum or gently brush evaporator and condenser coils seasonally to prevent dust buildup
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Keep rear and side vents clear for optimal airflow
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Ensure window is properly sealed to reduce energy loss
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Check and clear drainage holes to prevent water leaks
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Unplug and clean the unit at the end of the season to extend lifespan
