I Tested And Reviewed 9 Best Window Fan For Horizontal Sliding Window (2023)

After searching for a low profile fan for quite some time, I came across the Sharper Image PORTAL Window Fan and it has been a game changer. Ever since I moved into my current place in 2015, I've been struggling with poor air circulation due to the window facing a brick wall. However, with this fan, I can feel the breeze from at least 12 feet away and it has eliminated the stale air in my room.

The design of the fan is almost perfect, although it could have been better in terms of winter-proofing. However, with a little modification and insulation, it is possible to make it more suitable for colder months. The only downside is that installation can be a bit challenging if you have non-standard window frames.

I ended up purchasing two of these fans and they have worked wonders for me. Since I have narrow windows, I didn't face any issues with the baffles on the side like some other users did. I have placed one fan on exhaust and the other on intake in my upstairs loft, which tends to get warm. The fans work great and I love the convenience of not having to flip them around to change the airflow direction.

While these fans may be more expensive than others on the market, I wish I had invested in them sooner. As my other window fans wear out, I plan on replacing them with the Sharper Image PORTAL Window Fan. The added benefit of having a larger window to look out of is a bonus. Additionally, these fans have proven to be reliable even in rainy weather.

One reviewer mentioned securing the fan with duct tape and surrounding it with a black curtain for added insulation. I found this tip to be helpful in maximizing the fan's performance. It is surprisingly quiet and produces a good amount of airflow even on the highest setting. However, it's important to note that this is just a fan and not an air conditioner, so it's not effective in extreme heat. For hotter conditions, I suggest using a table fan or a standing/box fan inside the room.

The expandable window fan is an excellent product that offers great versatility. With its ability to fit various window sizes, it provides convenience and ease of use. The fan can expand up to 37 inches wide, making it suitable for most windows. Additionally, when fully folded, it measures 23.5 inches, ensuring compactness and easy portability.

The inclusion of a remote control adds to the convenience factor, allowing users to control the fan from a distance. With three speed modes – low, medium, and high – users can adjust the airflow according to their preference and needs.

One user mentioned using the fan to combat the intense heat in their apartment. With LA experiencing temperatures over 100℉ for two weeks, the fan proved to be a lifesaver. By installing it vertically in a window, the user was able to bring in fresh air while cooking and then switch to exhaust mode to remove heat. The versatility of the fan and the convenience of the remote control were highly appreciated.

Another user mentioned how the fan fits neatly in the window and can also be used as a free-standing unit. The fan operates relatively quietly, providing a pleasant sound. The dual fan in or out control feature adds to its versatility, making it a handy and powerful fan. The availability of low, medium, and high speed options further enhances its usability.

Living on the 10th floor of a high-rise building without a working HVAC system can be challenging. However, this fan proved to be a great solution. By setting it to "COOL" mode, the user was able to bring in cooler air and push hot air out. In "Circulate" mode, the fan helped exchange air, preventing smoke alarm activation while cooking. Though it may not be a high-speed air mover, it provided sufficient air movement to create a cooler environment.

Lastly, a user mentioned using the fan in a basement without proper ventilation. The fan's three functions and remote control made it a valuable addition to their friend's house. Despite its affordable price, the fan delivered good quality performance. Simply placing it on the basement window improved the air quality and circulation.

I recently purchased the SereneLife Portable A/C unit and was disappointed to find that the window mount exhaust kit provided was too long for my small window. I didn't want to cut it in case I move to a place with larger windows in the future, so I decided to purchase this smaller window kit. I'm happy to say that it fits perfectly with the SereneLife exhaust pipe and even came with sealing tape, which is very convenient.

I bought a used portable AC unit and unfortunately, the seller had lost the window panel vent. I found this replacement kit on Amazon at a reasonable price. Despite the color difference compared to our other unit with the OEM window panel vent, it works perfectly and seems to be of good quality. It looked brand new to me, even though it was sold as used.

Initially, the boards that came with my portable AC unit didn't fit my window, which left me quite upset. However, I was relieved to find these window panels that fit my odd-sized side slide window perfectly. Now, my AC is blowing nice cold air, and I couldn't be happier.

This window kit is excellent as it can accommodate various sizes due to the four panels it comes with. My window is 54 inches long, and with the four panels, it reaches at least 75 inches in length. Additionally, it can be adjusted vertically or horizontally, making it highly versatile. I highly recommend it for anyone in need of a window kit for their portable AC unit.

I recently purchased this AC vent kit to replace the one on my son's AC unit. I was unable to find these kits at local stores that sell portable AC units, so I turned to Amazon. The plastic end pieces of the kit feel sturdy and durable, which is a plus. The price of $45 is reasonable and not too expensive in my opinion. The shipping was fast, and I appreciate the convenience of ordering from Amazon. If I ever need another vent kit in the future, I know where to go.

During the summer, it can be challenging to find AC-related products in stock at local stores. So, I decided to rely on my trusty Amazon account. I came across this AC vent kit, which was priced at half of what I would have paid for just the hose at a store. To my surprise, the kit included more than I expected, and it was incredibly easy to use. I replaced more parts than originally planned, and the affordability was a pleasant bonus. I will definitely keep this kit for future use.

I lost my vent kit during a move last winter, and I am pleased with this replacement. It fits perfectly in my window and is easily adjustable. Connecting it to my portable AC unit is a breeze. I would highly recommend this kit to anyone in need of a replacement.

I needed a longer vent kit for my patio door, and this kit provided everything I needed. The screws are durable, and the plastic is hard, ensuring its longevity. The affordability of this kit is also worth mentioning.

For my specific needs, I am using this kit to vent a small exhaust fan in a window. It serves its purpose perfectly and meets all my requirements.

The cooling power of this fan is truly impressive. Despite being just a fan, it blows out air that feels almost as cold as an air conditioner. What's even better is that it utilizes the natural wind outside, making it even more efficient. With its three different speed settings, you can easily adjust it to suit your needs. If you're feeling particularly hot, the maximum setting will provide you with a strong breeze. On the other hand, if you're feeling a bit chilly at night, the night mode will give you just the right amount of cooling without making you freeze.

One of the standout features of this fan is its perfect fit for small bathroom windows with screens. You won't have to go through the hassle of removing the screen to install it, as it fits seamlessly. Additionally, it comes with a secondary screen that attaches to the inside part of the unit, preventing dust and lint from passing through the fan onto the outside screen. This thoughtful design ensures that your fan remains clean and efficient.

Another aspect worth mentioning is the fan's easy installation process and its excellent ventilation effect. You won't have to struggle with complicated instructions or tools to get it up and running. Once installed, it provides a cool and breezy airflow that will make any space more comfortable. Furthermore, it operates quietly on the low speed setting, although it can be a bit loud on the medium and high settings. However, this minor inconvenience is easily overlooked, considering the fan's overall performance.

In terms of value, this fan is a great investment. You'll be pleasantly surprised to discover the quiet mode feature when unboxing it. This additional setting, along with the high and low speeds, allows you to find the perfect balance of air circulation without disturbing your sleep. The super low setting, in particular, is ideal for those who want just enough airflow without the risk of waking up feeling chilly. It's surprising that more window fans don't offer this feature.

To summarize, this fan is a fantastic choice for anyone in need of a cooling solution. Its powerful airflow, easy installation, and thoughtful design make it a valuable addition to any space. Whether you're looking to beat the summer heat or simply improve the ventilation in your bathroom, this fan will not disappoint.

The Fanzy Window Fan has proven to be an excellent purchase for our family, so much so that we decided to buy a second unit. As our home lacks central air conditioning, these fans have been a lifesaver, especially during the warm days and cool nights. The fan's ability to circulate cool air through my bedroom by setting one fan on intake and the other on exhaust has helped maintain a perfect temperature for a comfortable sleep. While I don't frequently use the thermostat feature, it is a nice bonus to have, especially considering the affordable price of around $30. The expandable side of the fan is a great feature that allows for a perfect fit in any window, and I appreciate that I can fully extend it to block the opening completely.

One standout feature of the Fanzy Window Fan is its quiet operation, which provides a pleasant white noise that aids in falling asleep. My only suggestion for improvement would be to include a dedicated off switch, as currently, one has to cycle through all the modes before reaching the off position. The power cord placement at the bottom left front corner may also be a consideration for buyers if their window lacks a nearby electrical outlet.

The Fanzy Window Fan is truly a gem among the various options I have tried. It stands out with its high power and remarkably quiet operation. Installing the fan is a breeze, taking less than a minute to set up. The retractable expander is incredibly easy to use, and the added clip-on expander is a thoughtful inclusion for those with larger windows. One of the best features of this fan is its exhaust/intake mode, which allows for effortless airflow control without the need to manually reverse the fan.

Furthermore, the option to have one fan blowing in and another blowing out creates a refreshing and circulating breeze of fresh air. This versatility adds to the overall appeal of the Fanzy Window Fan. I am thoroughly impressed by its performance and consider it a great deal.

I am a proud owner of two Fanzy Window Fans and plan on purchasing more to combat the heat of this summer. These fans far surpass the airflow provided by regular box fans in the window. The convenience of switching the direction of airflow with a simple switch on the front is a game-changer. Each fan has its own switch, allowing for customized airflow, whether it be blowing in, out, or a combination of both to flush out hot air. Additionally, the fan comes with an extension piece to ensure a perfect fit in your window, and there's an extra 5-inch wide extension piece for added coverage.

The Fanzy Window Fan offers two fan speeds (high and low) and five temperature settings that automatically adjust the fan speed based on the desired temperature. This intelligent feature ensures optimal comfort without constant manual adjustments. I have been thoroughly satisfied with the performance of these fans and highly recommend them for anyone seeking a reliable and efficient cooling solution.

The double fan being reviewed here is not only compact but also extremely powerful. Even on the lowest speed setting, it provides a good amount of cool air. The fan comes almost fully assembled, requiring only the addition of the bottom feet and plugging it in.

The reviewer had previously purchased the Comfort Zone model, but one of the fans broke within a few months. They express their hope that this does not happen with the current fan. They are pleased with the functionality of the remote control and find the fans to be relatively quiet. However, their overall satisfaction will depend on whether or not the fan holds up over time.

The reviewer lives in an NYC prewar building with constantly blasting radiators, and they needed a fan to counteract the heat. They specifically chose this model because it does not have a thermostat that would mistake the outdoor temperature for the actual indoor conditions. They find the motor to be quiet and are already feeling relief from the heat. They even mention that they may be able to put away their shorts for the winter. However, they do mention that after about 48 hours of use, the fan blades started to rattle, which has dampened their initial excitement about the fan.

Despite the reviewer not feeling a strong wind when standing in front of the fan, they mention that the room cools down quickly. They highlight the convenience of being able to switch the speed even when flipping the fan to the other side. They also praise the seller for their excellent customer service, noting that they go above and beyond to resolve any issues.

In terms of design, the fan is described as having simple but nice features. It easily fits into windows with adjustable side panels that lock into place. The electric cord is designed to prevent pinching when placed in a window. Despite being lightweight, the fan operates like a heavy-duty fan.

I recently purchased this fan for my Florida condo to keep it cool during cold fronts without relying on air conditioning. I have found it to be quite effective in bringing in air from a north facing window. The fan operates smoothly and quietly, and the controls for fan speed and temperature are easy to use. Adjusting the fan speed is as simple as pressing a button to toggle between low, medium, and high settings. The temperature control follows a similar pattern with brackets indicating different temperature ranges. However, I personally do not use the temperature control feature.

One minor drawback I had anticipated before purchasing the fan is that it is designed to fit wooden windows and does not align well with aluminum frame, single hung windows. The aluminum frame's lip at the bottom prevents the fan from sliding back far enough, requiring me to modify the back legs to ensure a secure fit with the upper sash. Despite this inconvenience, the fan still functions well, although the sealing around the edges could be improved.

I primarily use this fan to vent my mancave of pipe smoke, and I have found that it produces a noticeable level of noise, particularly at maximum speed. At a distance of 5 feet, the noise levels measured around 50db on low and 60db on high. This is comparable to the noise level of a quiet office or a street on low, and normal conversation on high. However, since it produces white noise, it becomes easy to disregard the sound, especially if you have previous experience with full-sized box fans. I have mounted mine sideways behind a screen, and I would recommend using insulation strips to block any gaps. Although the screen reflects some of the sound back, without it, the actual sound level would be lower. Additionally, the screen serves the purpose of keeping insects out and preventing light rain from entering.

One minor inconvenience I have encountered is that the fan loses its settings during power outages and does not automatically turn back on once the power is restored. However, this is a relatively small issue compared to the overall performance of the fan.

I am particularly fond of this pair of reversible fans as they allow me to bring in cool air from outside in the morning and expel warm air in the afternoon, long before I need to resort to using air conditioning. The temperature sensors are accurate and automatically shut off the fans when the desired temperature is reached. There are three fan speeds to choose from, although I personally wish the lowest speed was even slower. Nevertheless, mounting the fan in my kitchen window frame sideways has proven to be a perfect arrangement.

Aspen has truly revolutionized the window fan market with their innovative and exceptional model. This window fan stands out from the crowd with its remarkable features, including super quiet operation, voice or app control, and easy cleaning capabilities.

One of the most important factors to consider when selecting a window fan is the noise level. The Aspen window fan surpasses expectations in this regard, particularly on the lowest fan speed. It is noticeably quieter than other window fans, including the popular "Bionaire Window Fan with Twin 8.5-Inch Reversible Airflow Blades and Remote Control." This makes it ideal for creating a peaceful sleeping or working environment.

Traditionally, window fans have struggled to strike the right balance between air throughput and noise emission. Many older models fail to offer a low enough fan speed to minimize noise levels while still providing adequate airflow. However, the Aspen window fan successfully addresses this issue, allowing users to enjoy a quieter experience without sacrificing air circulation.

In addition to its noise-reducing capabilities, this window fan also offers convenient control options. The ability to control the fan through voice commands or an app adds a new level of ease and convenience. Whether you prefer to simply speak to your smart device or control the fan from a distance, Aspen has you covered. This is an excellent feature, especially for those who value convenience during sleep or when unexpected weather conditions arise.

While Aspen's window fan truly shines in terms of innovation, it is worth noting that the rest of the market lacks similar advancements. Many other models fail to meet the desired criteria of being quiet, easy to use in the dark, and easy to clean. Aspen has successfully identified and fulfilled these needs, bringing much-needed innovation to the industry.

Price should not be a deterrent when considering the Aspen window fan. The added cost is negligible when compared to the quality of sleep and work that can be achieved without the disturbing noise generated by cheaper alternatives. Investing in a high-quality window fan is not only beneficial for your comfort but also for maintaining a clean and healthy living environment.

While the Aspen window fan has truly impressed with its features, there is still room for further innovation. One aspect that could be improved is the addition of removable lids for the fan openings. This would allow users to easily cover the fan during short cold spells in spring or fall, eliminating the need to remove the fan from the window entirely. Aspen, it would be wonderful if you could consider this enhancement in future iterations.