When the temperature rises, a dependable, energy-efficient small window AC may be your best ally—especially for small bedrooms, offices, or apartments. Our guide highlights the best small window ACs of 2025, helping you find a perfect fit for efficiency, quiet operation, easy installation, and relief from the summer heat.
These seven standout models balance value, efficiency, and reliability. Read on to find the right match for your needs.
- Best Small Window Air Conditioner
- Runner Up Best Small Window AC
- Best Value Small Window AC
- Best Small WiFi-Connected Window AC
- Best High-Efficiency Small Window AC
- Best Quiet Small Window AC
- Best Small Casement Window AC
Note: We have compiled this list of small, 8,000 BTU window air conditioners, typically suitable for spaces up to 350 square feet, but they're still ideal for smaller rooms. A general rule of thumb is that it's better to slightly oversize your air conditioner than to undersize it.
Best Small Window Air Conditioner of 2025
Friedrich Chill Premier 8,000 BTU Window Air Conditioner
The Friedrich Chill Premier combines powerful performance, user-friendly features, a compact and durable design, energy efficiency, and a reliable brand name, making it Sylvane's choice for the 2025 Best Small Window Air Conditioner.
The Chill Premier's modern design, robust build, and convenient features put it head and shoulders above its competitors. Even though different models might have fancier features or better efficiency, this model is the complete package if you need a small window air conditioner that packs a punch.
- Sizing: For 350 square foot spaces. Also offers a Friedrich Chill Premier 6,000 BTU version for spaces as small as 250 square feet or larger models for spaces up to 1,500 square feet.
- Control Features: Has Wi-Fi connectivity for remote temperature adjustments.
- Efficiency: Energy Star-rated operation with a 12.1 Energy Efficiency Ratio and an estimated yearly operating cost of $60.
- Installation Considerations: Fits windows between 20.125 and 36 inches wide and at least 14.5 inches tall.
Why We Picked It: The Friedrich Chill Premier is hard to beat if you need a reliable low-profile window air conditioner that delivers powerful cooling and modern amenities (like smartphone control).
Runner Up Best Small Window AC
LG 8,000 BTU Dual Inverter Window Air Conditioner
This LG Dual Inverter Window Air Conditioner is the next best option, offering a suite of features, high efficiency, and great performance.
LG has long been a leader in window AC units, and its 8,000 BTU Dual Inverter model proves why. This smart window AC offers advanced dual inverter technology that helps you save on energy costs while keeping your room cool, comfortable, and quiet. It also has a unique smart diagnosis feature that detects and troubleshoots issues, which we really like.
- Sizing: Good for spaces up to 340 square feet. LG also offers larger Dual Inverter Window AC models ranging from 10,000 to 23,500 BTUs for larger spaces up to 1,400 square feet.
- Control Features: Wi-Fi enabled, so you can control settings and operation from your smartphone
- Efficiency: Energy Star certified with a 13.8 Energy Efficiency Ratio (EER).
- Noise Level: Operates with a noise level as low as 44 dB.
- Installation Considerations: Fits windows at least 12 inches high and widths between 22 and 36 inches.
Why We Picked It: LG's Dual Inverter technology is known for its efficiency and nearly silent operation. If you want a quiet window air conditioner that's also energy efficient, this one checks all the boxes.
Best Value Small Window AC
LG 8,000 BTU Window Air Conditioner
The LG 8,000 BTU Window Air Conditioner is a fantastic choice for those looking to balance cost with performance. It's budget-friendly while still offering dependable cooling for small rooms.
- Sizing: For spaces up to 350 square feet. LG also offers 5,000 BTU and 6,000 BTU versions of this model, or larger sizes up to 24,500 BTUs.
- Control Features: User-friendly digital controls and multiple simple operating modes.
- Efficiency: Has an 11.4 Combined Energy Efficiency Rating and an estimated yearly operating cost of $72.
- Noise Level: Operates between 52 and 58 dB.
- Installation Considerations: Fits window widths between 22 and 36 inches and window heights larger than 13 inches.
Why We Picked It: This no-frills LG model delivers dependable cooling at a price point that's hard to resist. This model is an excellent option if you're focused on maximizing your budget while still getting a quality window AC unit.
Best Small WiFi-Connected Window AC
Frigidaire Gallery 8,000 BTU Wi-Fi Window Air Conditioner with Inverter
Frigidaire's Gallery series features top-of-the-line ACs with advanced connectivity and energy savings. If you want a smart window AC that allows you to control settings from anywhere, this 8,000 BTU Inverter model should be on your shortlist. Frigidaire's control app is especially user-friendly, giving users complete control over the settings, modes, scheduling, and connectivity with smart home assistant devices.
- Sizing: For up to 350 square feet, but also offers a 10,000 BTU and 12,000 BTU air conditioner version for larger rooms.
- Control Features: The most robust Wi-Fi connectivity of any model on this list. Wi-Fi connectivity and the Frigidaire app control every aspect of this model's operation.
- Efficiency: Energy Star Most Efficient rated for efficiency and energy savings
- Noise Level: As low as 41 dB.
- Installation Considerations: Fits windows between 24 and 38.8 inches wide and larger than 14 inches.
Why We Picked It: The Frigidaire Gallery series stands out with its user-friendly smart features and inverter technology, making it a top pick for anyone seeking convenience and energy efficiency.
Best High-Efficiency Small Window AC
Windmill 8000 BTU Wi-Fi Enabled Inverter Air Conditioner 08W2Wi
When it comes to marrying style, energy-efficient performance, and quiet operation, the Windmill 8000 BTU unit does it. Engineered with modern aesthetics and eco-friendly features, it's a perfect solution for cooling small- to mid-sized rooms.
This model has a 15 Combined Energy Efficiency Ratio and a 16 Energy Efficiency Ratio, which are excellent ratings for window air conditioners. Additionally, this model uses the eco-friendly R-32 refrigerant, which has a much lower global warming potential than the typical R-410A refrigerant.
- Sizing: Rated for 350 square feet, with other larger sizes up to 12,000 BTUs. See the other Windmill Window Air Conditioner models here.
- Control Features: Wi-Fi enabled for remote control and scheduling. It uses a proprietary Windmill Control App for home Wi-Fi connections.
- Efficiency: Energy Star-rated and boasts a 16 Energy Efficiency Ratio (EER), with an estimated yearly operating cost of just $41.
- Noise Level: 48 dB
- Installation Considerations: Fits windows between 23 to 37 inches wide, and a minimum window height of 14 inches.
Why We Picked It: The Windmill AC's design makes it feel more like a sleek home accessory than a bulky appliance. Combine that with powerful, Energy-Star-rated performance, and you have one of the most efficient small window air conditioners on the market today.
Best Quiet Small Window AC
Keystone 8,000 BTU 115V Energy Star Window Air Conditioner
If peace and quiet top your list of must-haves, the Keystone 8,000 BTU model delivers. Designed to minimize operational noise, it's perfect for bedrooms, nurseries, or any space where silence is golden. This model produces as little as 33 dB (about as quiet as a whisper or rustling leaves), which is exceptionally quiet for a window air conditioner.
- Sizing: For spaces up to 350 square feet. For 10K, 12K, and 14K BTU versions of this model, see Keystone Window Air Conditioners.
- Control Features: LED display with electronic controls.
- Efficiency: Energy Star-rated with inverter technology and an impressive 15 Energy Efficiency Ratio (EER). Costs as little as $43 per year to operate.
- Noise Level: 33 to 54 dB
- Installation Considerations: Fits windows between 23 and 38 inches wide and 13.8 to 19.5 inches high.
Why We Picked It: Keystone's focus on noise reduction makes this unit an ideal quiet window air conditioner. You'll also appreciate its energy-efficient performance and straightforward controls.
Best Small Casement Window AC
Keystone 8,000 BTU Casement Window Air Conditioner
Not all windows are created equal—if you have a casement (crank-out) window, the Keystone 8,000 BTU Casement Window AC is a must-see. It is engineered specifically for vertical and swinging windows and offers the same cooling power found in standard units, with a specialized design for your unique setup.
- Sizing: Good for rooms up to 350 square feet. A larger 10,00 BTU air conditioner is also available.
- Control Features: Full-function remote for convenient adjustments
- Efficiency: It is not Energy Star rated but has an energy-saving mode, allowing it to operate at an energy cost as low as $94 per year.
- Installation Considerations: Vertical design fits casement and sliding windows up to 21.3 inches high and between 15.5 and 16.3 inches wide.
Why We Picked It: Finding an energy-efficient and reliable casement window AC can be challenging. Keystone solves this by offering an easy-install, high-performance solution for tricky windows.
Which Small Window AC is Right for My Space?
Do you still need help buying the right window air conditioner for your space, or do you have a question about one of these models? Call us at 1-800-934-9194, visit us at Sylvane.com, or email product experts at [email protected]. We're committed to helping you find the perfect cooling solution for any room size, style, or preference. Here's to a cool and comfortable 2025!
