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10 Best Slim Window Ac 2025 in the United States

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Our Top Picks

#1

Winner

Midea 12,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier – Cools up to 550 Sq. Ft., Energy Star Rated, Quiet Operation, Electronic Controls, Remote Control, White

Rating
9.9
Chosen by1,154
Energy Efficiency Ratio (EER)
Noise Level

Most important from
17390 reviews

Energy Efficiency Ratio (EER)
Energy efficiency is a standout feature, with the unit pulling no more than 400 watts even on max settings.
Noise Level
The Midea unit is impressively quiet, making it a top choice for those sensitive to noise.

The Midea MAW12HV1CWT EasyCool Smart Inverter Air Conditioner Window Unit offers a versatile solution for year-round comfort, with its 12,000 BTU cooling capacity and supplemental heating feature. Designed for rooms up to 550 square feet, it is ideal for large spaces. It boasts an impressive Energy Efficiency Ratio (EER) of 13.3, making it energy efficient and cost-effective. Users can expect up to 35% energy savings compared to the Energy Conservation Standard, thanks to the variable-speed inverter technology. This unit is also Energy Star certified, which is a plus for those looking to reduce their energy consumption.

The noise level is notably low at 45 dBA, ensuring a quiet operation that won’t disturb daily activities or sleep. With dimensions of 22.17 x 19.41 x 13.9 inches and a weight of 58 pounds, it fits most double-hung windows with an opening width of 24 to 38.5 inches. Installation is straightforward with the included kit. Additional features include an LED display, five operational modes, three-speed settings, a 24-hour timer, and ECO energy saver mode. It can be controlled via the control panel, remote, or SmartHome App, and it’s also compatible with Alexa and Google Assistant for voice commands.

The unit also includes a washable filter accessible from the front panel for easy maintenance. However, one limitation is that the heating function will not work if the outside temperature drops below 41°F. Despite being mostly praised for its performance, some users might find the initial setup slightly challenging due to its weight and size. The Midea MAW12HV1CWT is a feature-rich, energy-efficient, and quiet window AC unit that offers both cooling and heating, making it suitable for those looking for a multi-season solution.

Rating
9.9
Chosen by1,154
Energy Efficiency Ratio (EER)
Noise Level

Most important from
17390 reviews

Energy Efficiency Ratio (EER)
Energy efficiency is a standout feature, with the unit pulling no more than 400 watts even on max settings.
Noise Level
The Midea unit is impressively quiet, making it a top choice for those sensitive to noise.
#2

Midea MAW12V1QWT U-Shaped AC Window Air Conditioner

Rating
9.8
Energy Efficiency Ratio (EER)
Noise Level
Dimensions and Weight

Most important from
821 reviews

Energy Efficiency Ratio (EER)
Energy efficiency and quiet operation stand out, with the unit running smoothly and keeping spaces comfortably cool without disturbing noise.
Noise Level
The U-shaped design allows fresh air and light to enter the room while cooling, and the inverter technology eliminates noisy on/off cycling for quiet, consistent comfort.
Dimensions and Weight
Ensuring the unit is properly leveled and securely mounted is crucial to guarantee correct drainage and avoid any risk of collapse during installation.
Additional Features
The updated 2025 model features a redesigned drain valve and improved window mounts that effectively prevent water buildup, resolving earlier mold concerns.

The Midea MAW12V1QWT U-Shaped Window Air Conditioner stands out for its innovative design and energy savings. Its unique U-shape lets you keep your window partially open, allowing fresh air and light while the unit cools. Quiet operation is a big plus here; at just 32 dB, it is much quieter than typical window ACs, making it ideal for bedrooms or offices. With a strong 12,000 BTU cooling capacity, it can comfortably cool spaces up to about 550 square feet.

Energy efficiency is impressive too — this model uses advanced inverter technology and has earned ENERGY STAR certification, helping reduce electricity bills by over 35% compared to older units. Smart features add convenience, allowing you to control the AC remotely via an app or voice commands through Alexa or Google Assistant. Installation seems straightforward with the included quick-snap bracket, but the unit's size and weight (around 59 pounds) mean you might need some help setting it up, and it fits windows 22 to 36 inches wide and at least 13.75 inches tall.

While it uses the eco-friendlier R32 refrigerant and includes useful extras like a dust filter and dehumidifier function, the physical dimensions are a bit bulky for some slim-window setups. Also, it requires batteries for the remote, which is a small extra to keep in mind. This Midea model is a solid choice if you want a quiet, energy-saving AC with smart controls and can accommodate a slightly heavier unit that fits certain window sizes.

Rating
9.8
Energy Efficiency Ratio (EER)
Noise Level
Dimensions and Weight

Most important from
821 reviews

Energy Efficiency Ratio (EER)
Energy efficiency and quiet operation stand out, with the unit running smoothly and keeping spaces comfortably cool without disturbing noise.
Noise Level
The U-shaped design allows fresh air and light to enter the room while cooling, and the inverter technology eliminates noisy on/off cycling for quiet, consistent comfort.
Dimensions and Weight
Ensuring the unit is properly leveled and securely mounted is crucial to guarantee correct drainage and avoid any risk of collapse during installation.
Additional Features
The updated 2025 model features a redesigned drain valve and improved window mounts that effectively prevent water buildup, resolving earlier mold concerns.
#3

Amazon Basics 5000-BTU Small Window Air Conditioner, Up to 150 Sqf, Window AC Units with Cool and Fan Functions, Washable Filter, Adjustable Window Kit, Intuitive Mechanical Controls, White

Rating
9.6
Cooling Capacity (BTU)
Energy Efficiency Ratio (EER)
Additional Features

Most important from
4449 reviews

Cooling Capacity (BTU)
The unit cools small spaces effectively, comfortably handling rooms as small as 10x10 and even larger living areas without losing efficacy over years of use.
Energy Efficiency Ratio (EER)
Energy consumption is impressively low, making it a budget-friendly option that keeps electricity bills relaxed even during hot summers.
Additional Features
Setup is straightforward and quick, with fast shipping and easy installation that gets the compressor running within about 20 minutes.

The Amazon Basics 5000 BTU Small Window Air Conditioner is designed for small rooms up to 150 square feet, making it a good fit for bedrooms, home offices, or cozy living spaces. Its cooling capacity is modest but sufficient for these smaller areas, providing reliable comfort without overkill. The unit is energy efficient, featuring a Seasonal Energy Efficiency Ratio (SEER) of 14, which helps keep electricity costs reasonable compared to less efficient models. Noise-wise, it operates quietly at around 56 decibels, so it won’t disturb your sleep or work, which is a nice plus for a bedroom AC.

In terms of size, the unit is fairly compact (about 16 x 13 x 12 inches) and weighs 35 pounds, which is manageable for a window air conditioner. It fits standard windows between 23 and 36 inches wide, with adjustable side panels to ensure a snug installation. Setting it up is relatively straightforward, though you’ll need basic tools like a screwdriver. Additional features enhance convenience: it has a washable pre-filter to trap dust and allergens, helping maintain air quality and making maintenance easy. The AC offers 7 temperature settings and 2 fan speeds, along with two-way air direction control, allowing you to customize airflow to your liking. It also includes a fan-only mode and dehumidifying function, adding versatility beyond simple cooling.

The cooling capacity restricts this unit to smaller rooms, so it’s not suitable if you need to cool larger spaces. Also, while the mechanical controls are intuitive, those expecting a digital display or remote control might find it lacking in modern conveniences. This unit represents a practical, budget-friendly choice for users needing effective cooling in a small space, valuing quiet operation and ease of maintenance over high power or advanced features.

Rating
9.6
Cooling Capacity (BTU)
Energy Efficiency Ratio (EER)
Additional Features

Most important from
4449 reviews

Cooling Capacity (BTU)
The unit cools small spaces effectively, comfortably handling rooms as small as 10x10 and even larger living areas without losing efficacy over years of use.
Energy Efficiency Ratio (EER)
Energy consumption is impressively low, making it a budget-friendly option that keeps electricity bills relaxed even during hot summers.
Additional Features
Setup is straightforward and quick, with fast shipping and easy installation that gets the compressor running within about 20 minutes.

Buying Guide for the Best Slim Window Ac

Choosing the right slim window air conditioner can make a significant difference in your comfort during hot weather. Slim window AC units are designed to fit into narrow windows, making them ideal for apartments or rooms with limited window space. When selecting a slim window AC, it's important to consider several key specifications to ensure you get the best performance and efficiency for your needs. Here are the key specs to look at and how to navigate them.
Cooling Capacity (BTU)Cooling capacity, measured in British Thermal Units (BTU), indicates how much heat the air conditioner can remove from a room per hour. This is crucial because it determines how effectively the unit can cool your space. For small rooms (up to 150 square feet), a unit with 5,000-6,000 BTU is sufficient. Medium-sized rooms (150-300 square feet) require 7,000-8,000 BTU, while larger rooms (300-450 square feet) need 10,000-12,000 BTU. To pick the right one, measure your room size and choose a unit with the appropriate BTU rating to ensure efficient cooling.
Energy Efficiency Ratio (EER)The Energy Efficiency Ratio (EER) measures the efficiency of the air conditioner by comparing the cooling capacity (BTU) to the power input (watts). A higher EER indicates a more efficient unit, which can save you money on energy bills. EER ratings typically range from 8 to 12. For better energy savings, look for units with an EER of 10 or higher. If you prioritize energy efficiency and lower operating costs, choose a unit with a higher EER.
Noise LevelNoise level, measured in decibels (dB), indicates how loud the air conditioner will be when operating. This is important for maintaining a comfortable and quiet environment, especially in bedrooms or living rooms. Noise levels for slim window AC units typically range from 50 to 60 dB. For a quieter experience, look for units with noise levels below 55 dB. Consider where you will be using the AC and how sensitive you are to noise when selecting the right unit.
Dimensions and WeightThe dimensions and weight of the air conditioner are important to ensure it fits properly in your window and can be installed safely. Slim window AC units are designed to fit narrow windows, but it's still essential to measure your window dimensions and compare them to the unit's specifications. Additionally, consider the weight of the unit, as heavier units may require additional support or assistance during installation. Choose a unit that fits your window size and can be installed securely.
Additional FeaturesAdditional features can enhance the convenience and functionality of your air conditioner. Common features include remote control, programmable timer, sleep mode, and adjustable fan speeds. These features can make it easier to control the unit and customize your cooling experience. Think about which features are important to you and how they can improve your comfort and convenience when selecting a unit.

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