12,000 BTU U-Shaped Window Air Conditioner, Window AC Unit with Dehumidifier, Cools Up to 550 Sq. Ft for Large Rooms, Saddle AC Unit with Full Window View, 4 Fan Speeds, 24H Timer, Sleep Mode
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Availability:
In Stock.
Arrives
Thursday, May 28
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Set name: 12,000 BTU Upgraded
Features
- WHISPER-QUIET 45dB OPERATION & U-TYPE FORM Prioritize your sleep with a window AC that isolates noise by design. The U-shaped silhouette allows the window sash to act as a sound barrier, keeping the mechanical hum outside. At just 45dB, it provides a serene environment for nurseries or workspaces while keeping your window functional and bright.
- VERSATILE 3-IN-1 CLIMATE CONTROL (12,000 BTU) Powerful enough to cover 550 sq. ft., this unit combines a high-performance air conditioner, a powerful dehumidifier, and a 3-speed fan. Whether you need to strip moisture from muggy air or achieve rapid cooling in a large room, the intuitive 62-86F thermostat gives you total control.
- HASSLE-FREE INSTALLATION KIT No specialized handyman required. Our comprehensive installation kit includes a dedicated support bracket for a worry-free setup. Compatible with standard window frames (up to 11 inches sill depth). Please verify your window dimensions (24-48 inches width) for an optimal, airtight fit.
- CUSTOMIZABLE SLEEP & AUTO MODES Optimize your rest with a dedicated Sleep Mode that subtly adjusts temperatures overnight. With 6 operating modes and a 24-hour delay timer, you can pre-cool your room before arriving home. The 4-way directional airflow ensures no "hot spots" are left in your living space.
- ECO-FRIENDLY PERFORMANCE & WASHABLE FILTER Cut down on utility bills with a high-efficiency design that costs significantly less to run than traditional models. Protect your investment and your air quality with the reusable mesh filtersimply slide it out, rinse, and replace to keep the unit running at peak efficiency.
Brand: Antarctic Star
Capacity: 400 Cubic Feet
Cooling Power: 12000 British Thermal Units
Special Feature: 4 Way Swing, Dehumidifier, Fast Cooling, Sleep Mode
Product Dimensions: 28.94"D x 18.7"W x 14.96"H
Color: White
Voltage: 115 Volts (AC)
Noise Level: 55 Decibels
Power Source: Corded Electric
Form Factor: window
Cooling Power: 12000 British Thermal Units
Additional Features: 4 Way Swing, Dehumidifier, Fast Cooling, Sleep Mode
Color: White
Noise: 55 Decibels
Inverter Type: No Inverter
Installation Type: Window
Compressor Type: rotary_scroll
Is Outdoor Unit Required: No
Air Conditioner Application: Residential
Voltage: 115 Volts (AC)
Power Source: Corded Electric
Wattage: 690 watts
Efficiency: High Efficiency
Control Method: Push Button, Remote
Controller Type: Remote Control
Warranty Type: Limited
Brand Name: Antarctic Star
Model Name: A5418W-12K
Model Number: NCAA-08C/X1E
Included Components: Installation Kit, Remote
Manufacturer: Antarctic Star
Item Type Name: U-Shaped Window Air Conditioner
Warranty Description: 1 Year Manufacturer
Item Dimensions D x W x H: 28.94"D x 18.7"W x 14.96"H
Item Weight: 68.34 Pounds
Window Opening Minimum Height: 11 Inches
Window Opening Minimum Width: 27.94 Centimeters
Capacity: 400 Cubic Feet
Floor Area: 550 Square Feet
Form Factor: window
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, May 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Set name: 12,000 BTU Upgraded
For a single wide mobile home, this was the perfect fit in the window of the main living room. This one unit keeps temps cool and comfortable even while cooking. Also, very quiet.
Reviewed in the United States on April 20, 2026 by Kendra Williams
I received this unit a couple weeks ago and I had been hoping the weather would stop being completely frigid so that I could set this air conditioner into the window and demonstrate it. I decided to just unpack it and test it so that I could write the review, but not completely install it since I'm still using heat in my part of the country. The unit comes in an outer box with strapping on the internal packing. Get a friend to help you pull the box off. The unit is heavy, but the delivery man hauled it up to my porch by hand by himself and I'm able to lift it by myself - and hauled it up to the 3rd floor once it was out of the package by myself. It's bulky. You'll be more comfortable with a helper. The unit has spacers that support the whole thing so you don't bend the window sill. Then outside there are two knobs which you'll turn to push against the house on the outside to level it. I've set the unit on a console table so that you can see the knobs you'll need to adjust. Make sure they're fully retracted before you try to put the unit in the window. You'll probably need the clearance space. I'm was a little concerned about that piece because I thought the window was going to be tight around the unit and it's on a 3rd floor window. You should consider that requirement in your plans. They include a spirit level so you can level side to side and front to back. When the unit is running it will collect moisture inside the part inside the house. On the lower left front there is a drain plug to drain it every so often. The unit is, of course, ETL listed and it can be looked up on Intertek's site. It's also energy star rated and while there is a sticker on the outside box, there's another included with the manual. The manual itself is mostly safety warnings, but it does inform on some of the error messages you might encounter. The front of the unit opens up and the air particle screens are a type that fold underneath the unit. I've pulled one of the two forward so you can see what I mean. It has a sleep function, which helps keep it quiet since the compressor part is outside the window and segmented. I found the whole unit to be very quiet for an air conditioner. The fact the compressor is outside does make a difference so that you mostly hear the fan. I always found the window units were quieter than the floor models anyhow. Testing the cooling worked well. It got very cold very quickly. This seems like it is going to work really well for the room I'm putting it in.
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Reviewed in the United States on March 24, 2026 by BGood
I went into this skeptical. U-shaped window ACs sound clever on paper, but clever designs often mean complicated installs and mediocre real-world performance. After living with this unit, here's the unvarnished truth. The U-shaped saddle design isn't a gimmick, it's a genuine engineering improvement over traditional box units. The window closes down around the middle of the unit, which does three things at once: it seals air leakage, dramatically reduces noise bleed from the compressor (which stays outside), and perhaps most surprisingly leaves your view and natural light largely intact. If you've ever lived with a traditional window AC that turned your room into a cave, this alone is worth the price of admission. The built-in dehumidifier mode is a genuine bonus, not an afterthought, it pulls moisture effectively, which matters as much as temperature in humid climates. Three fan speeds, Cool/Dry/Fan modes, and a functional remote round out a solid feature set. Advertised at around 45 decibels. it's roughly library-ambient background hum. What it isn't is the rattling, glass-shaking roar of older box units. Realistic expectation: pleasant white noise, however not whisper silent. The unit is heavy, and the U-shape means one person needs to be inside and one outside to lower it onto the sill safely. The included kit (support bracket, foam sealing blocks, weather stripping) is comprehensive and well-thought-out. The weather stripping trimming is the most tedious part of the process. Budget about an hour. Measure your window opening *before* ordering; this unit has specific dimensional requirements the saddle design demands. One Caveat Worth Noting: The support bracket clamps apply concentrated pressure against the window frame. Bottom Line, This is what window AC units should have been all along. The U-shaped design solves real problems; noise, light blockage, air sealing, that traditional designs have accepted as unavoidable trade-offs for decades. It cools fast, runs quiet enough for sleeping, and installs without requiring a contractor. The weight means you need a helper, and you need to measure your window first. Neither of those is a dealbreaker. If you're cooling a bedroom or medium-sized living space without central air, this is a genuinely strong choice.
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Reviewed in the United States on March 19, 2026 by C. R. Hatfield