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10 Best Window Acs 2025 in the United States

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Our Top Picks

#1

Winner

Windmill - The Windmill AC Modern Air Conditioner - Easy Install - Includes User Friendly App - Ultra-Quiet and Voice-Enabled 8000 BTU Window Air Conditioner

Rating
9.7
Chosen by1,292
Cooling Capacity (BTUs
Energy Efficiency Ratio (EER)
Noise Level

Most important from
1195 reviews

Cooling Capacity (BTUs
Efficient cooling even in record-high summer temperatures, with excellent air distribution across the room.
Energy Efficiency Ratio (EER)
Energy-saving features like EcoRewards help reduce the carbon footprint and save money on energy bills.
Noise Level
Its ultra-quiet operation means you sometimes forget it's on, which is perfect for noisy environments like NYC.
Additional Features
The smart controls are intuitive and easy to navigate, adding to the overall user-friendly experience.

The Windmill 8,000 BTU Window Air Conditioner is a stylish and efficient option for cooling spaces up to 350 square feet. With a sleek design and curved edges, it easily blends into modern home decor. One of its standout features is the ultra-quiet operation at 50 dB, which makes it suitable for bedrooms and living rooms where noise levels need to be minimal. Additionally, the auto-dimming LED display ensures it won't disturb your sleep at night.

The unit is equipped with smart capabilities, including Wi-Fi and app control, allowing you to manage it remotely via your smartphone or through voice commands with any voice assistant device. This can be particularly handy for adjusting settings before you arrive home or if you forget to turn it off when you leave. Installation is made simple with a pre-assembled install kit and clear instructions, meaning you can have it up and running quickly without much hassle.

In terms of efficiency, the Windmill AC has a Seasonal Energy Efficiency Ratio (SEER) of 6.2, which is decent but not the highest in its category. It uses R32 refrigerant, which is more environmentally friendly compared to traditional options. Maintenance is user-friendly with a filter light reminder that prompts you when it's time to clean or replace the dust filter. On the downside, its energy efficiency ratio and wattage might not be the best for those highly concerned with energy consumption. At 71.4 pounds, it’s also relatively heavy, which could make installation a bit challenging for some users. Despite these, the Windmill 8,000 BTU Window AC offers excellent cooling power, smart features, and ease of use, making it a solid choice for anyone looking to cool a medium-sized room efficiently.

Rating
9.7
Chosen by1,292
Cooling Capacity (BTUs
Energy Efficiency Ratio (EER)
Noise Level

Most important from
1195 reviews

Cooling Capacity (BTUs
Efficient cooling even in record-high summer temperatures, with excellent air distribution across the room.
Energy Efficiency Ratio (EER)
Energy-saving features like EcoRewards help reduce the carbon footprint and save money on energy bills.
Noise Level
Its ultra-quiet operation means you sometimes forget it's on, which is perfect for noisy environments like NYC.
Additional Features
The smart controls are intuitive and easy to navigate, adding to the overall user-friendly experience.
#2

Whynter Portable Air Conditioner 14,000 BTU with Dual Hose Dehumidifier & Cooling Fan for 500 Sq. Ft. Rooms, Includes AC Unit Window Kit, ARC-148MS (10,300 BTU SACC), White

Rating
9.4
Cooling Capacity (BTUs)
Noise Level
Size and Installation

Most important from
805 reviews

Cooling Capacity (BTUs)
This air conditioner cools like crazy, dropping the room temperature by 26 degrees and cooling a room down by 1 degree in just 5 minutes.
Noise Level
The unit is loud on high settings, generating 62 dB, but the noise level is manageable at a distance, making it suitable for sleeping as white noise.
Size and Installation
Installation is straightforward, taking only 20 minutes to set up.
Maintenance and Filter Type
Maintenance is minimal, requiring only the rinsing of two filters once a summer and checking the condensation collector drain in humid conditions.

The Whynter Portable Air Conditioner boasts a robust 14,000 BTU (ASHRAE) and 10,300 BTU (SACC) cooling capacity, making it suitable for cooling spaces up to 500 square feet. This unit operates relatively quietly at a noise level of 53 dB, which is comparable to a normal conversation, making it a good option for bedrooms or home offices. One of the standout features is its dual hose system, which enhances cooling efficiency and speeds up the cooling process compared to single-hose models.

Its dehumidifying capacity is impressive, removing up to 71 pints of moisture per day, which can be particularly beneficial in humid climates. The unit also comes with multiple operational modes including cooling, dehumidifying, fan, and auto, providing flexibility based on your needs. The energy efficiency ratio (EER) is decent at 13, though there are more energy-efficient models available in the market.

It’s easy to install with an extendable exhaust hose and a window kit, and its portability allows you to move it between rooms with relative ease. The air filtration system includes an activated carbon filter and a washable pre-filter, contributing to cleaner indoor air. However, it is quite heavy at 73 pounds, which might make it difficult for some users to move around. It does not have an Energy Star rating, which means it may consume more electricity compared to other energy-efficient models. The unit comes with a one-year limited warranty on the main unit and three years on the compressor. If you need a portable air conditioner with good cooling capacity and dehumidification features, and you don’t mind the higher energy consumption, this Whynter model could be a strong choice.

Rating
9.4
Cooling Capacity (BTUs)
Noise Level
Size and Installation

Most important from
805 reviews

Cooling Capacity (BTUs)
This air conditioner cools like crazy, dropping the room temperature by 26 degrees and cooling a room down by 1 degree in just 5 minutes.
Noise Level
The unit is loud on high settings, generating 62 dB, but the noise level is manageable at a distance, making it suitable for sleeping as white noise.
Size and Installation
Installation is straightforward, taking only 20 minutes to set up.
Maintenance and Filter Type
Maintenance is minimal, requiring only the rinsing of two filters once a summer and checking the condensation collector drain in humid conditions.
#3

DeLonghi America PACEM360 WH DeLonghi Penguino Portable Air Conditioner with 6000.0 BTU Cooling Power, Remote Control, Eco-friendly and Portable in White

Rating
9.2
Cooling Capacity (BTUs)
Noise Level
Size and Installation

Most important from
652 reviews

Cooling Capacity (BTUs)
DeLonghi America PACEM360 cools great and has stood the test of time.
Noise Level
I wouldn't be able to sleep without it, especially in hot Florida weather. It maintains a comfortable room temperature and provides soothing background noise.
Size and Installation
Cools fast and operates quietly. Easy to set up and use.

The DeLonghi America PACEM360 WH DeLonghi Penguino Portable Air Conditioner is designed for medium-sized rooms up to 400 square feet. It offers a cooling capacity of 6000 BTUs (SACC), making it suitable for moderately warm environments. One of its strengths is its energy efficiency, being up to 17% more effective than some previous models, though it does not have an Energy Star rating. The noise level at 53 dB is reasonable, especially on the low setting which offers quieter operation for peaceful cooling.

Size-wise, the unit is fairly compact and portable, with dimensions of 13.6”D x 16.7”W x 27.6”H and pre-attached wheels for easy relocation from room to room. Installation is straightforward and user-friendly, with an included window kit and remote control for convenient operation. Additional features like the programmable timer, washable dust filter, and eco-friendly gas contribute to its user-friendly design. Maintenance is simple with the washable filter that can be cleaned under a faucet.

However, its Seasonal Energy Efficiency Ratio (SEER) of 6.92 is relatively low compared to some other models on the market. It provides good cooling and dehumidification, but its effectiveness may decrease in larger or hotter spaces. This unit is best suited for users looking for a portable and eco-friendly solution to cool medium-sized rooms efficiently.

Rating
9.2
Cooling Capacity (BTUs)
Noise Level
Size and Installation

Most important from
652 reviews

Cooling Capacity (BTUs)
DeLonghi America PACEM360 cools great and has stood the test of time.
Noise Level
I wouldn't be able to sleep without it, especially in hot Florida weather. It maintains a comfortable room temperature and provides soothing background noise.
Size and Installation
Cools fast and operates quietly. Easy to set up and use.

Buying Guide for the Best Window Acs

Choosing the right window air conditioner (AC) can make a significant difference in your comfort during hot weather. The right unit will efficiently cool your space, be energy-efficient, and fit well within your room's design. To make an informed decision, you need to consider several key specifications. Understanding these specs will help you select the best window AC for your needs.
Cooling Capacity (BTUs)BTU stands for British Thermal Unit, and it measures the cooling power of an AC. The higher the BTU, the more powerful the unit. It's important because it determines how effectively the AC can cool a room. For small rooms (100-300 sq. ft.), 5,000-7,000 BTUs are sufficient. Medium rooms (300-500 sq. ft.) need 8,000-12,000 BTUs, while large rooms (500+ sq. ft.) require 12,000-18,000 BTUs. Choose a unit with the right BTU rating for your room size to ensure efficient cooling.
Energy Efficiency Ratio (EER)The Energy Efficiency Ratio (EER) measures how efficiently an AC uses electricity to cool a room. A higher EER means better energy efficiency, which can save you money on your electricity bills. EER is calculated by dividing the BTUs by the power consumption in watts. Look for units 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 AC will be when operating. This is important if you plan to use the AC in a bedroom or a quiet space. Units with noise levels below 50 dB are considered quiet, while those above 60 dB can be quite loud. If you are sensitive to noise or need a quiet environment, choose a unit with a lower noise level.
Size and InstallationThe physical size of the window AC and its installation requirements are crucial. Ensure the unit fits your window dimensions and check if it comes with an installation kit. Some units are designed for easy DIY installation, while others may require professional help. Measure your window and compare it with the AC's dimensions to ensure a proper fit. If you prefer a hassle-free setup, look for units with easy installation features.
Additional FeaturesModern window ACs come with various additional features that can enhance convenience and comfort. These may include remote control, programmable timers, sleep mode, energy-saving mode, and Wi-Fi connectivity. Consider which features are important to you. For example, a remote control can be handy for adjusting settings from a distance, while a programmable timer can help you save energy by turning the unit on and off automatically.
Maintenance and Filter TypeRegular maintenance is essential for the efficient operation of your window AC. Check the type of filter the unit uses and how easy it is to clean or replace. Washable and reusable filters are cost-effective and environmentally friendly. Ensure the unit allows easy access to the filter for regular cleaning. If you want to minimize maintenance efforts, choose a unit with a filter that is easy to remove and clean.

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