I Tested And Reviewed 10 Best Energy Efficient Portable Air Conditioner (2023)

I recently purchased this portable air conditioner after my old wall unit broke down, and so far, I am extremely satisfied with its performance. I have been using it for over a week now, primarily for fan and air circulation purposes. It provides a decent amount of air flow, and the noise level is tolerable. Having previously owned a Black and Decker portable unit, I am accustomed to the noise as long as it effectively cools down the room.

In terms of cooling capabilities, I have tested the unit in cooling mode, and I must say that the cold air coming out is powerful and effectively cools down the room in a short time. This makes it a great value for the money, and I am hopeful that it will help me stay comfortable throughout the summer.

Installation was a breeze, taking minimal time and effort. I placed the unit in my bedroom, and it was able to cool the room effortlessly. The strong fan and ice-cold air are impressive, and I believe it could even cool a small living area. The ability to adjust the fan speed and set the temperature for automatic shut-off is a convenient feature. Additionally, it offers the option to run as a fan, air conditioner, or dehumidifier, providing versatility.

The unit came with a hose and window attachment, both of which were easy to install. However, I did not receive the remote control as mentioned in the product description, which may have been a slight oversight during packaging.

Living in California, this mini air conditioner is a must-have during the summer, especially for guest rooms or areas that do not require the entire house's AC to be turned on. It performs exceptionally well, quickly achieving the desired room temperature.

As someone who started working from home due to the COVID-19 pandemic, I needed an air conditioner for my study this summer. Initially, I had doubts about the cooling power of this compact unit, despite the manufacturer's claim that it can cool rooms up to 350 sq.ft. However, after giving it a try, I was pleasantly surprised. It effectively cools down my study, and the best part is that unlike other window AC units in my house that require installation, this portable AC simply requires adjusting the panel to fit the window. There is no struggle to push the AC into the window.

The included remote control is convenient, allowing me to adjust the temperature without leaving my chair. The plug also has a safety button, ensuring peace of mind. The control user interface is sleek and easy to navigate. Overall, this portable air conditioner has greatly aided me in staying cool and focused on my job during the summer. I am thankful for its performance and reliability.

I recently purchased this small and efficient air conditioner, and I must say it has exceeded my expectations. One of the best features is its ability to blow out super cold air without significantly raising my electric bill. Additionally, the noise level is not as loud as other air conditioners I have used in the past.

The unit has a small footprint, making it easy to fit in tight spaces. I particularly appreciate the well-designed window vent for the exhaust hose, which eliminates the hassle of constantly readjusting and securing the hose. The remote control is basic but functional, with intuitive timer controls. Furthermore, the temperature display remains on even when the unit is turned off, allowing me to easily monitor the ambient temperature in the room.

In terms of design, the unit's clean and simple aesthetic is quite appealing. However, there are a few minor drawbacks. Firstly, the noise level, particularly from the fan, is slightly higher compared to other units I have used. Nonetheless, I personally do not find it bothersome, especially since I use a white noise machine while sleeping. Secondly, the display and some buttons remain lit even when the unit is off, which may be a concern for some individuals. However, since I primarily use the air conditioner while sleeping, the lights do not bother me.

Another issue is that the touch-sensitive controls on the unit itself are not very responsive, requiring multiple presses to achieve the desired function. However, this problem is easily solved by using the remote control, which is much more user-friendly. It is worth noting that the remote control does not come with batteries, which would have been a nice addition.

Lastly, the user manual could benefit from better language clarity, as it may require multiple reads to fully understand the instructions. However, setting up the unit is relatively straightforward and self-explanatory.

One minor inconvenience is that the glossy black top of the unit tends to attract dust, requiring regular cleaning. A matte finish would have been preferable in this regard.

I recently had to replace my old AC unit due to storm damage, and I decided to try out the Windmill AC unit. I ordered it on June 19th and received it on June 22nd. The installation process was straightforward, and I was impressed with the WiFi feature that allows me to control the unit remotely. However, when I turned it on, I was disappointed to hear a loud noise that sounded like a rock tumbler. I immediately turned it off and contacted customer support via email, expecting a 24-48 hour response time. To my surprise, I received a response from Francesca within minutes, asking for a video of the issue. She provided troubleshooting steps shortly after, even though it was late at night. I decided to give it another try the next day and sent an email to support, mentioning that the previous steps had helped but the noise was still present. Lois took over and provided additional troubleshooting steps, which resolved the issue. I was relieved to find that the unit is now quiet and cools the room effectively. I am so satisfied with the product and customer support that I plan on replacing my other damaged units with Windmill AC units. I highly recommend this product and its exceptional support.

*Update* I recently purchased a second Windmill AC unit, and the setup process was just as easy as the first one. There were no issues, and my house is slowly returning to a comfortable temperature. Now, I just need to cool off the upstairs as well! Overall, I had heard great things about Windmill AC units, and they truly exceeded my expectations. The installation instructions were clear, the unit has a sleek appearance with its side panels, and the accompanying app makes it incredibly convenient to control. Not to mention, it operates quietly and keeps the room perfectly cool. I would definitely recommend Windmill AC units to others.

I recently purchased this air conditioner and I must say, I am quite impressed. Right out of the box, it worked flawlessly. The unit is incredibly quiet, even when the compressor is running. With its 8000 BTU cooling power, it provides more than enough cooling for my needs.

One of the features I really appreciate is its sleek design, which doesn't take up much space in the room. Additionally, the unit rolls easily from room to room, making it convenient to use in different areas of my home.

I haven't had the chance to use the remote yet, but I'm excited to try it out.

Another reviewer mentioned that the window insert was a bit problematic, as it doesn't lock too well. However, I haven't experienced this issue myself.

I also love the fact that this air conditioner can be connected to WiFi. This feature allows me to control the unit from my phone, even when I'm not at home. It's a great convenience and gives me peace of mind.

Furthermore, this air conditioner has been a lifesaver for me. When my central cooling system struggled to cool my upstairs area, this unit stepped in and effectively cooled the entire space.

While the reviewer mentioned using this unit in a van, I found that it works best in shaded or nighttime conditions. In extreme heat, it may not be as effective, but it still provides some relief.

In terms of energy consumption, this unit pulls about 900 watts on full power.

One of the highlights for me was when my AC broke down in the scorching Arizona heat. This air conditioner kept my bedroom livably cool for three days until the AC was fixed. It saved me from paying a hefty repair bill and proved to be a reliable alternative.

Although I initially wanted to install a new HVAC unit, I found that using window units, like this one, was a more practical and cost-effective solution. The air produced by this unit is cold and powerful, easily keeping me comfortable even in 90-degree weather.

While it may not be the quietest air conditioner, you quickly get used to the noise. However, I do agree with another reviewer that the instructions could be clearer, particularly regarding the drainage ports.

I recently purchased this dehumidifier and air conditioner, and I must say, it has exceeded my expectations. The heater works flawlessly, providing ample warmth during colder days. What impressed me the most is how silently it operates, ensuring a peaceful environment.

At first, I was slightly disappointed as it seemed to only circulate the air without much cooling effect. However, after about 30 seconds, it kicked in and started blowing out refreshingly cold air. In fact, the air became so chilly that I had to take a step back. Within minutes, it successfully cooled down my entire room, making it incredibly comfortable.

One aspect that pleasantly surprised me was its weight. Unlike other similar products that are usually heavy and difficult to move around, this dehumidifier and air conditioner is surprisingly lightweight. I was able to effortlessly transport it thanks to the convenient wheels it comes with.

The remote control is another fantastic feature. It allows me to conveniently adjust the temperature without having to get up from my seat. It truly adds a level of convenience to the overall experience.

The packaging was secure, and the device itself looks sleek and stylish in any room. I highly recommend this air conditioner for its outstanding performance and user-friendly features. It has become an essential appliance in my home, and I couldn't be happier with my purchase.

I am extremely satisfied with this portable A/C unit. It is not only quiet but also the perfect size for my room. Within just 10 minutes, it effectively cools down my room, making it a great addition to my living space.

I purchased this unit specifically for my bedroom, which faces the sun all afternoon. During the summer months, sleeping becomes quite difficult in this room as it tends to get warmer than the rest of the house. However, this portable A/C unit does a remarkable job of supplementing the cooling in the room. I appreciate its size, as it is easy to set up and doesn't take up much space. The unit also offers several useful features such as a dehumidifier, fan, remote control, water full shut-off, and timer program.

The only minor inconvenience I have encountered so far is the large heat discharge hose that needs to be connected to the window. However, considering the overall performance of the unit, this drawback is insignificant.

Installation of this air conditioner is a breeze. It is user-friendly and easy to operate. Additionally, emptying out the unit is a simple task, although I haven't had to do it frequently. The adjustability of the A/C unit is impressive, and it even comes with a remote control, adding to its convenience and functionality. Overall, this product has exceeded my expectations and I am thoroughly impressed with its performance.

This portable A/C unit is worth every penny. We had been experiencing extreme discomfort in our old mobile home located in the desert, as our central AC had broken down. With outside temperatures reaching up to 113 degrees, the internal temperature of the trailer was unbearable at 98 degrees. However, once this unit arrived (three days earlier than promised, which was a delightful surprise), the bedroom temperature dropped to a comfortable 74 degrees. Considering that our bedroom and trailer have no insulation and are directly exposed to the scorching desert sun, this A/C unit has provided us with much-needed relief. We have closed our windows and added blackout curtains to maximize its efficiency. For the first time in a month, we have found respite from the oppressive heat. Even our pets have sought refuge in the bedroom, and we have been enjoying our time watching TV and eating in bed. We are immensely grateful for this unit and its ability to offer us comfort in such extreme conditions.

Not only does this portable A/C unit effectively cool our bedroom, but it also helps reduce the workload on our central unit. This has significantly reduced the amount of time our central unit runs throughout the day. Given its outstanding performance, I would definitely purchase this unit again if the need arises.

I recently purchased the Costway Portable Air Conditioner and I must say, it exceeded my expectations. Living in Southern California, where the nights can get uncomfortably hot, this AC unit came to my rescue. As soon as I plugged it in, it started blowing cold air within minutes. The cooling power was so impressive that both my daughters and pets didn't want to leave my room. In fact, it got so cold that I had to turn it down to the lowest setting and even then, I had to eventually turn it off because it was too chilly. My dog even buried herself under the covers! Needless to say, I am extremely satisfied with my purchase and I plan on buying two more units for the other rooms in my apartment. Highly recommended!

I ordered two of these portable AC units to help my elderly parents beat a 7-day extreme heatwave. Once we received them, they worked exceptionally well. The instructions were easy to follow, although it did require some effort to screw in the exhaust tubing. However, it was definitely manageable. One thing I want to highlight is that the delivery took longer than the original date provided by Amazon. I paid extra for shipping to ensure timely delivery, but we ended up receiving the units three days after the expected delivery date. However, I must commend the Costway Amazon team for their responsiveness and efforts to address my concerns. They worked closely with FedEx to expedite the delivery and even offered compensation for the delays. Despite the shipping hiccup, we did receive the units before the heatwave became more severe for my parents. I truly appreciate their exceptional customer service. I highly recommend this portable AC, but make sure to order it well in advance to allow for any potential delivery delays.

After researching multiple portable ACs, I decided to go with the Costway Portable Air Conditioner and I couldn't be happier with my choice. I use it for a two-bedroom upstairs loft and it has proven to be an excellent buy. The assembly was a breeze and it functions flawlessly. The noise level is minimal compared to my old air unit, which is a huge plus. I simply drain the unit directly into an unused bathtub and vent it out a small window. One suggestion I have for improvement is to provide a window slide for smaller sized windows. Currently, I am using cardboard as a temporary solution, which works fine for now. While the unit doesn't keep the entire 400 sq ft area cold, it does a great job at cooling it down, which is exactly what I wanted. Having a remote control is also a convenient feature, especially when I'm busy in my office and want to turn on the AC remotely. Overall, I am extremely satisfied with the Costway Portable Air Conditioner and would highly recommend it.

I recently purchased this portable air conditioner after my old wall unit broke down, and I must say, it has exceeded my expectations. I have been using it for over a week now and it has been working great. Even though it's not particularly hot right now, I have been using it for air circulation in my living room, and it provides a decent amount of airflow. The noise level is also tolerable, which is a plus for me.

I previously owned a Black and Decker portable unit, so I am accustomed to the noise level as long as it effectively cools down the room. I tested the cooling mode, and the cold air that comes out is quite powerful and cools down the room quickly. It appears to be a great value for the money and I am hopeful that it will continue to keep us cool throughout the summer months.

In terms of installation, I found it to be super quick and easy. I installed it in my bedroom and it effectively cools the room. The fan is strong and the air is ice cold. I believe it could even cool a small living area. I appreciate the option to set the fan speed to high or low, as well as the ability to set the temperature for automatic shut-off when reached. It also has the convenient functions of being able to run as a fan, air conditioner, or dehumidifier. Although I haven't utilized the dehumidifier function yet, it's a nice addition.

The portable air conditioner came with a hose and window attachment, both of which were easy to install. However, I did not receive the remote control as it was supposed to be included. Nonetheless, it hasn't hindered my overall satisfaction with the product.

Living in California, having a reliable air conditioner during the summer is a must, and this mini AC has proven to be a great solution. I use it in my guest room so that I don't have to turn on the central AC for the entire house when it's not necessary. This mini AC works exceptionally well and quickly brings the room temperature to a comfortable level.

Due to the Covid-19 situation, I have started working from home and needed an air conditioner for my study this summer. Initially, I was skeptical about getting this smaller unit, as I doubted its ability to cool down the room despite the instructions stating that it can effectively cool rooms up to 350 sq.ft. However, after giving it a try, I was pleasantly surprised. It does a fantastic job of cooling down my study. Unlike the window AC units in my house that require installation, this portable air conditioner is easy to set up. Simply adjust the buttons to fit the panel into your window without any struggle. The included remote control allows me to conveniently adjust the temperature without having to leave my chair. Additionally, the plug comes with a safety button, and the control UI is clean and user-friendly. This portable air conditioner has truly helped me get through the summer while staying in my study and focusing on my work.

After experiencing the unbearable heat in our small office, we decided to invest in an air conditioning unit that would not only cool down the space but also be aesthetically pleasing and inconspicuous from the outside due to our strict HOA regulations. We were delighted to discover that this AC unit met all our requirements and more.

One of the standout features of this AC unit is its affordability. It provided a cost-effective solution without compromising on performance. The unit arrived promptly within 48 hours, surpassing our expectations, especially considering we had opted for shipping.

Upon installation, we were pleasantly surprised by how quiet the AC unit operated compared to traditional window units. This feature was particularly beneficial as it aided in reducing background noise, allowing us to focus on our work without any distractions. Additionally, the unit's dehumidifying function proved to be advantageous, especially in a space filled with electronics. It effectively reduced the humidity levels, creating a more comfortable environment for both us and our equipment.

We were impressed by the self-evaporating function of the AC unit, eliminating the need for constant drainage. Although it does have a drain and a tube for draining purposes, we have yet to utilize them as the unit efficiently manages the condensation without any issues. This convenience adds to the overall user-friendly experience.

The installation process was a breeze, and we appreciated the flexibility it provided. Unlike traditional window units, we now have the option to remove the AC unit from the window and enjoy the natural breeze during cooler nights. This versatility aligns with our preferences and enhances our ability to enjoy fresh air when desired.

In terms of cooling performance, this AC unit exceeded our expectations. It effectively cools down our office within 30 minutes of operation, maintaining a consistently comfortable temperature. It strikes a perfect balance between cooling efficiency and avoiding excessive coldness, ensuring we are not left shivering in an overly chilled environment.

I recently purchased a portable AC unit for my garage as I needed some additional cooling during hot days. The product I chose was reasonably priced and arrived quickly. It was easy to remove from the packaging and compact in size, which didn't take up too much space in my garage.

The unit came with all the necessary elements to vent the heat out, and I made some minor adaptations to my garage door to ensure proper ventilation. Initially, when I tried the Cooling mode, I didn't feel cool air coming out. However, after a moment, I heard the compressor starting to work and the cool air began flowing. The air was strong and cool, and I even tested the temperature using an infrared thermometer, which showed it to be 43℉.

One feature I liked was the turbo function, which provided even more cooling power. However, this function did increase the noise level, but it was still acceptable for me. It measured around 56.7dB, which may not be quiet but was manageable.

One important thing to note is that you need to fasten the drain cap tightly to avoid any leakage after running the unit for a couple of hours. I will continue using the portable AC and update if there are any issues. So far, it has been working well for me.

Moving on to another review, I want to emphasize the importance of following the instructions provided with the portable AC unit. The title on the box clearly states that you should let the unit sit upright for 4-5 hours before plugging it in. Failure to do so can lead to damage, as the oil inside needs to settle properly.

After using the unit for about a week, I found that it effectively heats the whole downstairs area of my open floorplan split level home. It keeps the living room, kitchen, and foyer warm, just like having a furnace. However, if you plan to use the heat pump to warm your home, it's crucial to buy an external condensation pump to remove the moisture that accumulates in the tank, especially in humid areas like the southeast US.

To address this issue, I placed the portable AC unit on its own platform about 6 inches off the floor. I used the included drain tubing to connect it to an external condensation pump that sits behind the unit. I also drilled a hole in the window mount and ran the tube through it. The condensation pump evacuates the water approximately once every hour for a few seconds. This is a standard requirement for any portable AC unit with a built-in heat pump or dry setting, as the water needs to be drained. A condensation pump can easily be purchased for $50 or less.