Best Window and Portable Air Conditioners 2026: Seven Units Tested for Noise, Cooling, and Efficiency

Introduction

Summer heat can make any room uncomfortable, and choosing the right air conditioner often comes down to balancing price, noise, cooling power, and installation effort. We tested seven units side by side: five window models and two portable units on wheels. Each was installed in the same window, measured for noise at multiple distances, checked for coldest air output, and monitored for energy use. The results reveal clear differences in performance that go beyond the spec sheet.

How We Tested

Every unit was installed in a window measuring close to 37 inches wide. We measured noise levels from about 4 feet away on both low and high cooling settings, as well as outside noise from 4 feet behind the window. Cooling output was recorded using a calibrated thermometer after each unit ran for roughly 15 minutes. Energy draw was measured on fan-only and cooling modes. We also evaluated build quality, insulation fit, and how much air leaked through the accordion shutters or window kits.

Amazon Basics 5000 BTU Window Air Conditioner

At $125, the Amazon Basics is the most affordable unit in this test. It is rated for 5,000 BTUs and designed to cool rooms up to 150 square feet. It offers seven temperature settings, two cooling modes, and two fan speeds. The air direction can be aimed left or right, but not up or down. The washable air filter is easy to remove and reinstall. It fits windows 23 to 36 inches wide and needs a minimum of 13 inches of height. Estimated yearly energy cost is around $44. It does not include a remote control.

Assembly took about five minutes. The accordion shutters did not offer much of a seal, and a noticeable amount of air passed through the gaps. Noise measured 58.4 dB on low cool and 59.8 dB on high cool, making it one of the louder units. Outside noise was 63.6 dB. The coldest air output measured 50.8 degrees Fahrenheit. It weighs close to 33 pounds.

LG 5000 BTU Window Air Conditioner

The LG costs $169 and is also rated for 5,000 BTUs with a 150 square foot cooling capacity. It fits windows 21 to 35 inches wide and up to 12 inches in height. It includes a remote control, two cooling modes, and two fan speeds. The washable dust filter is easy to clean. Estimated yearly energy cost is around $44. It is made in Thailand.

The LG was noticeably quieter than the Amazon Basics, measuring 51.7 dB on low cool and 56.1 dB on high cool. Outside noise was 63.5 dB. The accordion shutters had a much smaller gap compared to the Amazon Basics, though some air still passed through. The coldest air output measured 49.2 degrees Fahrenheit, the best among the budget window units at that point. It weighs around 32 pounds.

Black & Decker 8000 BTU Portable Air Conditioner

The Black & Decker portable unit costs $260 and is rated for 8,000 BTUs, or 5,000 BTUs SACCC (seasonally adjusted cooling capacity), which reflects more realistic cooling power. It claims to cool rooms up to 350 square feet and can pull 50 pints of water from the air in 24 hours. It rolls on four wheels, includes a remote control, and requires an exhaust hose with a window adapter. Estimated yearly energy cost is around $80. The cord length is 71 inches.

This portable unit was the quietest tested up to that point at 49.2 dB on low cool and 50.4 dB on high cool. Outside exhaust noise measured 54.1 dB. It also produced the coldest air of any unit at 47.2 degrees Fahrenheit. Energy use was higher than the window units at around 719 watts on low cool and 732 watts on high cool. The window slider kit required some additional foam insulation for a proper seal. It weighs close to 50 pounds.

GE 5000 BTU Window Air Conditioner

The GE window unit costs $158 and is rated for 5,000 BTUs with a 150 square foot cooling capacity. It offers seven temperature settings, two cooling levels, and two fan speeds. It fits windows 23 to 34 inches wide with a minimum height of 14.5 inches. Estimated yearly energy cost is around $44. It does not include a remote control. It is made in China.

Noise measured 55.9 dB on low cool and 59.4 dB on high cool, with outside noise at 65.6 dB, the loudest of the group. The accordion shutters did not fit the window casing well, leaving noticeable air gaps. On the positive side, it produced cold air at 47.8 degrees Fahrenheit. It weighs around 35 pounds.

Windmill 6000 BTU Window Air Conditioner

The Windmill costs $340 and is rated for 6,000 BTUs with a cooling capacity of up to 250 square feet. It is Wi-Fi compatible and includes a remote control. Estimated yearly energy cost is around $67. The insulation kit is the best of the window units and even includes scissors for trimming. The unit blows air up and out at a 45-degree angle for better room circulation. It is made in China.

The accordion shutters come pre-attached, making this the easiest window unit to install. Noise measured 52.4 dB on low cool and 58.9 dB on high cool, with outside noise at 63.8 dB. The coldest air output was 48.4 degrees Fahrenheit. It weighs 49 pounds.

Midea U-Shaped 6000 BTU Window Air Conditioner

The Midea costs $350 and is rated for 6,000 BTUs with a 250 square foot cooling capacity. Its U-shaped design allows the window to open, bringing in fresh air and preserving more of the view. It uses advanced DC inverter technology for claimed 37% energy savings at around 625 watts. It works with Wi-Fi for remote control from anywhere. It is made in Thailand.

Installation took about 25 minutes and required customizing a bracket to fit the window. The unit sealed up nicely with minimal air leakage. Noise was the best of all units at 37.8 dB on low cool and 45.8 dB on high cool. Outside noise measured 56.7 dB. The coldest air output was 48.4 degrees Fahrenheit. The insulation kept the interior portion of the unit cooler than traditional designs. It weighs 48 pounds.

Dreo 8000 BTU Portable Air Conditioner

The Dreo portable unit costs $389 and is rated for 8,000 BTUs, or 5,000 BTUs SACCC. It can keep the temperature between 61 and 86 degrees Fahrenheit. It is self-evaporating and includes a drain hose for environments with humidity above 90%. It is made in Indonesia.

The window slider kit sealed better than the Black & Decker’s kit, with minimal air movement through the seal. Noise measured 50.9 dB on low cool and 55.2 dB on high cool. Exhaust noise was the quietest of all units at 53.9 dB. The coldest air output was 53.8 degrees Fahrenheit, not quite as cold as the Black & Decker. Energy use was around 700 watts on low cool and 720 watts on high cool. It weighs 46 pounds.

GE Profile 6100 BTU Window Air Conditioner

The GE Profile costs $397 and is rated for 6,100 BTUs with a 250 square foot cooling capacity. Its adjustable chaseway accommodates wall thicknesses between 4.5 and 13.75 inches. It fits windows 20 to 40 inches wide and up to 10 inches in height. It supports hands-free voice control and Wi-Fi connected smart devices. It is made in Thailand.

Installation took about five minutes longer than a traditional unit. Noise was tied with the Midea at 37.8 dB on low cool and was the best on high cool at 43.4 dB. Outside noise measured 66.8 dB. The coldest air output was 47.3 degrees Fahrenheit. It is the heaviest unit at 70 pounds.

Overall Buying Advice

If you want a window unit, the Midea U-Shaped model is the top pick. It combines excellent build quality, very low noise, and strong cooling performance. The GE Profile is a close second and equally quiet, making it a strong alternative if the U-shaped design does not suit your window.

For a portable unit, the Black & Decker is hard to beat at under $300. It is relatively quiet and produces the coldest air of any unit tested. If you are on a tight budget, the LG window unit outperformed the other two competitors priced below $200.

Conclusion

All seven air conditioners arrived well packaged and undamaged. The U-shaped designs from Midea and GE impressed with their quiet operation and efficient insulation. The portable units offer flexibility and easy relocation, with the Black & Decker delivering the best combination of price and performance. Choose based on your room size, window type, and noise tolerance, and you will find a unit that keeps you comfortable all summer.