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10 Best Costco Air Conditioners 2025 in the United States

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Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.

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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
9.8
Chosen by1,371
Energy Efficiency Ratio (EER)
Noise Level
Smart Features

Most important from
17464 reviews

Energy Efficiency Ratio (EER)
Energy efficiency is a standout feature, with the unit pulling no more than 400 watts on both cooling and heating modes.
Noise Level
The unit is impressively quiet, making it suitable for environments where low noise is essential.
Smart Features
The smart features, including WiFi connectivity and remote updates, enhance the usability and convenience of the unit.

The Midea MAW12HV1CWT EasyCool Smart Inverter Air Conditioner is a versatile 12,000 BTU unit that serves both cooling and heating needs, suitable for rooms up to 550 square feet. This unit is energy efficient, certified by Energy Star, boasting an Energy Efficiency Ratio (EER) of 13.3. It's designed with an inverter compressor, which helps in saving up to 35% on energy costs compared to standard models, making it a cost-effective choice for year-round use. Additionally, the air conditioner includes smart features like WiFi connectivity, allowing control via the SmartHome App, Alexa, or Google Assistant, which adds convenience to its use.

The inclusion of multiple modes and speed settings, as well as a 24-hour timer, further enhance its user-friendly nature. The noise level is quite low at 45 dBA on the quietest setting, making it suitable for bedrooms or workspaces where low noise is important. However, the heating function may not be effective if the outside temperature falls below 41°F, which could be a limitation for those in colder climates. Installation requires a specific window size, so ensuring compatibility with your window dimensions is essential. The unit is relatively heavy at 58 pounds, which might make installation challenging for some users.

With a 2-year limited warranty, the Midea MAW12HV1CWT appears to be a reliable choice for those seeking a multifunctional air conditioner. Those looking for a quieter, energy-efficient, and smart-featured unit will likely appreciate what this product offers, especially in regions with moderate temperatures.

Rating
9.8
Chosen by1,371
Energy Efficiency Ratio (EER)
Noise Level
Smart Features

Most important from
17464 reviews

Energy Efficiency Ratio (EER)
Energy efficiency is a standout feature, with the unit pulling no more than 400 watts on both cooling and heating modes.
Noise Level
The unit is impressively quiet, making it suitable for environments where low noise is essential.
Smart Features
The smart features, including WiFi connectivity and remote updates, enhance the usability and convenience of the unit.
#2

LG 12,000 BTU Window Air Conditioner, 115V, Cools 550 Sq.Ft. for Bedroom, Living Room, Apartment, Quiet Operation, Electronic Control with Remote, 3 Cooling & Fan Speeds, Auto Restart, White

Rating
9.6
Noise Level
Energy Efficiency Ratio (EER)
Type of Air Conditioner

Most important from
17332 reviews

Noise Level
The unit performs very well with quiet operation, making it suitable for bedrooms and living spaces without causing noise distractions.
Energy Efficiency Ratio (EER)
Energy-saving mode cleverly cycles the fan to maintain comfort without continuous noise, enhancing nighttime usability.
Type of Air Conditioner
Its installation is a tight fit but seals the window effectively, providing good insulation from outside air.
Filter Type
Despite minor cosmetic dents and occasional issues like a crooked fan or persistent filter light, the unit remains dependable and easy to adjust.

The LG 12,000 BTU window air conditioner is a solid choice for cooling medium-sized rooms up to about 550 square feet, like bedrooms, living rooms, or apartments. Its 12,000 BTU power means it can handle typical spaces without struggling. It operates quietly, at around 52-53 dB on low settings, so it won’t be a noisy distraction while you work or sleep. You get three fan and cooling speeds along with an easy-to-use digital control panel and remote, making adjustments straightforward.

The air conditioner also includes a washable mesh filter with a reminder light, which helps keep the air clean and the unit efficient. With a 24-hour timer and auto restart feature, it offers decent convenience and energy-saving options. However, this unit doesn’t have advanced smart features like WiFi control or app connectivity, which some users might expect these days. Its seasonal energy efficiency ratio (SEER) of 13 is average, so it’s not the most energy-efficient model but should be reasonable for standard use.

The installation kit is included, making setup easier for a window unit. Weighing 81 pounds, it’s on the heavier side but typical for this capacity. This model is a dependable and user-friendly window air conditioner best suited for people who want reliable cooling with quiet performance and basic controls, without needing smart home integration.

Rating
9.6
Noise Level
Energy Efficiency Ratio (EER)
Type of Air Conditioner

Most important from
17332 reviews

Noise Level
The unit performs very well with quiet operation, making it suitable for bedrooms and living spaces without causing noise distractions.
Energy Efficiency Ratio (EER)
Energy-saving mode cleverly cycles the fan to maintain comfort without continuous noise, enhancing nighttime usability.
Type of Air Conditioner
Its installation is a tight fit but seals the window effectively, providing good insulation from outside air.
Filter Type
Despite minor cosmetic dents and occasional issues like a crooked fan or persistent filter light, the unit remains dependable and easy to adjust.
#3

LG 8,000 Window Air Conditioner, 115V, 350 Sq.Ft. (14' x 25' Room Size), Quiet Operation, Electronic Control with Remote, 3 Cooling & Fan Speeds, Auto Restart, 8000 BTU, White

Rating
9.3
BTU (British Thermal Units)
Energy Efficiency Ratio (EER)
Noise Level

Most important from
17332 reviews

BTU (British Thermal Units)
Cools very quickly and performs well beyond the size of the intended room, ensuring comfortable temperatures fast.
Energy Efficiency Ratio (EER)
Energy saver mode adds efficiency without sacrificing cooling power.
Noise Level
Operates quietly with low noise levels, making it less disruptive during use.
Smart Features
Auto Restart feature is convenient, ensuring the unit powers back on after outages without manual reset.
Filter Type
The filter clean indicator may sometimes activate prematurely, even when the filter is clean.

The LG 8,000 BTU Window Air Conditioner is a solid choice for cooling medium-sized rooms up to 350 square feet, such as bedrooms or living rooms. It offers a good cooling capacity that fits well with the intended room size, ensuring comfortable temperatures without excessive energy use, supported by a decent Seasonal Energy Efficiency Ratio (SEER) of 11.4. One of its strengths is its quiet operation, with noise levels around 53-54 decibels in low mode, making it less disruptive compared to louder units.

You can customize your comfort with three cooling and fan speeds plus an Auto Cool mode, controlled easily via electronic buttons or the included remote, which adds convenience. The Auto Restart feature automatically powers the unit back on after a power outage, so you don’t have to manually reset it. It does not have smart features like Wi-Fi connectivity, which some newer models offer for app control or voice commands. The filter includes a light reminder to signal when cleaning is needed.

Its size and weight are typical for window units, though installation may require some effort. While the unit has a modest energy efficiency rating and quiet operation, it lacks advanced Energy Star certification, so it might not be the best pick for those prioritizing the highest energy savings. This LG air conditioner is a practical and user-friendly option for those wanting reliable cooling in a mid-sized space without complexity or extra smart features.

Rating
9.3
BTU (British Thermal Units)
Energy Efficiency Ratio (EER)
Noise Level

Most important from
17332 reviews

BTU (British Thermal Units)
Cools very quickly and performs well beyond the size of the intended room, ensuring comfortable temperatures fast.
Energy Efficiency Ratio (EER)
Energy saver mode adds efficiency without sacrificing cooling power.
Noise Level
Operates quietly with low noise levels, making it less disruptive during use.
Smart Features
Auto Restart feature is convenient, ensuring the unit powers back on after outages without manual reset.
Filter Type
The filter clean indicator may sometimes activate prematurely, even when the filter is clean.

Buying Guide for the Best Costco Air Conditioners

Choosing the right air conditioner can make a significant difference in your comfort, especially during hot weather. When shopping for an air conditioner at Costco, it's important to consider several key specifications to ensure you get the best fit for your needs. Understanding these specs will help you make an informed decision and find an air conditioner that provides efficient cooling, fits your space, and meets your specific requirements.
BTU (British Thermal Units)BTU measures the cooling capacity of an air conditioner. The higher the BTU, the more powerful the unit is at cooling larger spaces. For small rooms (up to 150 sq. ft.), a unit with 5,000-6,000 BTU is sufficient. Medium-sized rooms (150-300 sq. ft.) require 7,000-8,000 BTU, while larger rooms (300-450 sq. ft.) need 10,000-12,000 BTU. For very large spaces, you may need a unit with 14,000 BTU or more. Choose a BTU rating that matches the size of the room you want to cool for optimal efficiency.
Energy Efficiency Ratio (EER)The Energy Efficiency Ratio (EER) indicates how efficiently an air conditioner uses electricity to cool a room. A higher EER means better energy efficiency, which can lead to lower electricity bills. EER is calculated by dividing the BTU rating by the unit's wattage. Look for air conditioners with an EER of 10 or higher for good energy efficiency. If you prioritize saving on energy costs, opt for a unit with a higher EER.
Noise LevelNoise level is measured in decibels (dB) and indicates how loud the air conditioner will be when operating. Lower dB levels mean quieter operation. For a peaceful environment, especially in bedrooms or living rooms, look for units with noise levels below 50 dB. If noise is less of a concern, you can consider units with higher dB levels. Choose based on where you plan to use the air conditioner and your sensitivity to noise.
Type of Air ConditionerThere are several types of air conditioners, including window units, portable units, and split systems. Window units are installed in a window and are ideal for single rooms. Portable units can be moved from room to room and are good for temporary cooling. Split systems have an indoor and outdoor unit and are suitable for cooling multiple rooms or larger spaces. Consider the installation requirements and flexibility you need when choosing the type of air conditioner.
Smart FeaturesSmart features include Wi-Fi connectivity, remote control via smartphone apps, and compatibility with voice assistants like Alexa or Google Assistant. These features allow you to control the air conditioner remotely, set schedules, and monitor energy usage. If you value convenience and tech integration, look for units with smart features. If you prefer a more traditional approach, you can opt for models without these features.
Filter TypeAir conditioners come with different types of filters, such as standard, HEPA, or activated carbon filters. Standard filters capture dust and larger particles, HEPA filters are more effective at trapping smaller particles like pollen and pet dander, and activated carbon filters help reduce odors. Choose a filter type based on your air quality needs. If you have allergies or pets, a HEPA filter may be beneficial. For general use, a standard filter may suffice.

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