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A good window fan brings in fresh air and keeps your space cool and comfortable—circulating breezes, reducing stuffiness, and saving energy, all while giving you control over airflow with a simple, efficient design.
To help you get the right window fan, we bought and rigorously tested 8 fans. Our team of experienced testers examined airspeed, circulation effectiveness, noise, installation, and controls, both in the lab and in windows. The results of this research will provide you with all the information needed to make a quick, easy, and well-informed choice about your new fan.
Our top choice, the Bionaire Premium Digital 8.5" Twin, is a highly customizable fan with single-degree adjustments, ample airflow settings, and a low operating noise level. A simple but cost-effective fan is the Amazon Basics Manual 9" Twin. This fan doesn't possess the features and complexity of higher-priced options, but it performs well and is straightforward.
Light brightness can only be adjusted when fan is running
Starts-up in high mode
Disruptive beeping with each button press
The Bionaire Premium Digital 8.5" Twin window fan stands out as a versatile and efficient choice, offering a myriad of features that cater to the needs of discerning users. One of its standout attributes is its precise control, allowing adjustments in single-degree increments and providing unparalleled customization to suit individual preferences. This level of control extends to its intuitive interface. Our lead tester noted, “I found it easier to identify and switch between different modes and settings on this fan, significantly enhancing the user experience.” Another notable feature is its ability to stand vertically, offering flexibility in placement and optimizing airflow distribution within the room. We recorded an impressive maximum speed noise level that registers far below most, highlighting the whisper-quiet operation of this window fan. Importantly, its decent energy efficiency underscores its economical operation, making it an environmentally conscious choice.
However, amidst its strengths, the Bionaire Twin has its share of drawbacks worth considering. One notable inconvenience is its tendency to initially start in high mode for a moment, potentially causing a brief disturbance before settling into the desired setting. Furthermore, the limitation of adjusting light brightness only when the fan is on may pose a minor inconvenience for users who prefer to adjust settings independently. Our reviewer noted, “I found the audible beeps every time I pressed a button annoying.” Lastly, while the fan performs adequately in circulating air, we measured a mediocre air movement that may not deliver the same level of air differential as more powerful full window fans such as the Air King 9166F 20" Whole House. Even when considering these shortcomings, the Bionaire Premium continues to stand out as an excellent option for individuals searching for effective cooling solutions, offering a seamless combination of convenience and high performance.
As our top choice, the Bionaire Premium Digital 8.5" Twin Window Fan distinguishes itself as a versatile and efficient option.
Power switch is conveniently located on both sides
REASONS TO AVOID
Fan must be removed and rotated to switch modes
Lacks automatic shut-off feature that is temp-based
Cannot stand vertical
The Amazon Basics Manual 9" Twin stands out as a practical and versatile choice, offering a range of features at an affordable price. Notably, our reviewers appreciated its commendable noise levels. One tester said “I appreciate the relatively quiet operation that doesn't disturb my daily activities.” Furthermore, our thrust test demonstrated a force exerted by this fan at 1.27 newtons, indicating satisfactory performance, especially within the context of other window fans. Its simplicity in design and operation adds to its appeal, with our lead tester reporting that “There aren't unnecessary complexities on this fan — it's simple, which I really liked from a functionality standpoint.” Moreover, its free-standing design allows placement flexibility, accommodating various spatial constraints within the home. A subtle yet appreciated addition, the inclusion of a power switch on both sides significantly boosts convenience.
While the Amazon Basics Manual 9" Twin boasts numerous strengths, it also presents some drawbacks that should be carefully considered. Its cubic feet per minute (CFM) readings reflect lackluster air movement, potentially limiting its effectiveness in larger spaces. One tester noted, “I found it inconvenient to physically remove the fan and manually rotate it to switch between intake and exhaust modes,” a feature that detracts from ease of use. Furthermore, the absence of a temperature shut-off feature may concern users seeking automated climate control functionality. Lastly, the fan is not suitable for vertical standing, restricting its versatility in placement options. These shortcomings are kind of par for the course with budget options. If you don't mind investing a few more bucks, the Bionaire Premium Digital 8.5" Twin could be a better alternative in the long run. But if the listed drawbacks don't seem like dealbreakers to you, the Amazon Basics Manual 9" Twin remains a viable option for anyone looking for a window fan that functions well and isn't too complicated. We like it, particularly for smaller spaces where noise levels and ease of operation are paramount considerations.
The Amazon Basics presents itself as a practical choice for individuals in search of a simple and effective window fan solution.
The Air King 9166F 20" Whole House window fan emerges as a powerhouse, offering a multitude of features that cater to the needs of households seeking efficient ventilation for the entire home. Boasting an impressive volume of air movement, our reviewer says this fan “excels at circulating air throughout an entire house. I experienced consistent airflow and optimal comfort in every room.” Its powerful performance is further underscored by our thrust test results, which calculate the amount of propelled force the fan can push out. The Air King rated high amongst our selection, continuously demonstrating that it can ventilate large spaces effectively. The cherry on top of this fan lies in its clearly labeled power dial, facilitating effortless adjustments that elevate the user experience to new heights.
Despite its numerous strengths, the Air King 9166F 20" Whole House does have several drawbacks that need to be taken into account. Firstly, one tester pointed out that “the substantial weight made it a little challenging for me to install, requiring additional effort and care to securely mount.” More worrisome, our noise test revealed a significant noise level compared to others. Unfortunately, the Air King doesn't have a wide range of power in its available setting, so you're stuck with the high noise volume at any level. If installation ease and noise level are paramount concerns, the Bionaire Premium Digital 8.5" Twin may be a better fit. Despite these drawbacks, the Air King 9166F 20" Whole House fan has its perks, and it is a good choice if you need powerful and efficient ventilation through larger spaces or whole-house circulation.
A powerhouse of a window fan that will do a great job in cooling the whole house.
The Vornado Transom introduces an intriguing new approach to window fans, offering users a distinctive fanning experience unparalleled by any other model on the market. The fan's sleek, low-profile design allows for discreet window placement, seamlessly blending with any decor. “I love that this model has a remote, so I could effortlessly control settings from a distance,” our lead tester remarked. Its unique “closing” feature, when turned off, prevents unwanted air exchange, ensuring optimal comfort during downtime. Our noise tests revealed remarkably low noise levels, guaranteeing quiet operation that won't interfere with daily tasks. Additionally, its remarkable energy efficiency highlights its eco-friendly and cost-effective design.
However, despite these commendable strengths, the Vornado Transom does have some drawbacks that warrant consideration. Its CFM readings suggest relatively poor air movement compared to other window fans, potentially limiting its effectiveness in adequately ventilating larger spaces. Our lead reviewer noted: “I found the screen turns off too quickly, and the touch screen controls inconsistently register finger touches, detracting from the overall user experience.” We noted that the fan's inability to be disassembled for cleaning poses challenges in maintaining long-term performance and cleanliness. Considering the relatively high price tag, some users may perceive the Vornado Transom as a risky investment. In such cases, opting for a more budget-friendly and conventional window fan like the Amazon Basics Manual 9" Twin may be a safer choice. With these considerations in mind, the Vornado Transom persists as an attractive choice for those seeking a modern, efficient window fan solution, particularly well-suited to smaller spaces.
The Vornado Transom introduces a unique concept for window fans, providing users with an unparalleled fanning experience unlike any other model available.
Credit: Natalie Kafader
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Why Trust GearLab
Getting work done in a poorly ventilated room on a hot summer day can be a drag, especially with yearly records of high temperatures suggesting that this issue won't resolve itself. Fortunately, there is a solution: window fans. They can make a significant difference in saving money for those who don't want to overhaul their entire ventilation system. Our team looked at the top window fans on the market and tested their effectiveness in providing cooling relief to varying room types and sizes. With seasoned testers at the helm, we took a deep dive to assess each fan's power output, measured decibel levels to determine noise, and scrutinized the extent of airflow, evaluating its reach both directly and laterally. We disassembled each fan, evaluating the convenience of cleaning. Additionally, we tested the ease of installation to ensure hassle-free setup in any window configuration. Furthermore, we monitored the energy consumption of every fan, ensuring that our readers can make an informed decision without worrying about skyrocketing energy bills. Through our comprehensive testing process, our goal remains steadfast: to serve as your trusted ally in selecting the perfect window fan for your space. Consider this your one-stop guide to finding the ultimate cooling companion.
Our testing is broken down into five categories to help distinguish what attributes you may prefer:
Power and Circulation (45% of overall score weighting)
Noise (30% weighting)
Cleaning (10% weighting)
Energy Use (10% weighting)
Installation (5% weighting)
Senior Review Analysts Austin Palmer and Jared Eastlick bring a wealth of expertise to testing window fans. Palmer, a seasoned electronics specialist, dedicates his work week to evaluating tech products, boasting a remarkable track record in testing diverse items, from VR headsets to vacuums. With a profound understanding of electronic devices, Palmer excels in crafting testing regimens that reveal the true capabilities of any tech product, and does so with meticulous attention to detail. Notably, his extensive background in temperature regulation, including air conditioning and portable heaters, equips him with invaluable knowledge of airflow dynamics and temperature control, ensuring insightful evaluations of window fans for consumers. He has tested more than 125 products related to temperature control. All this testing has culminated in years of experience to bring you the most comprehensive line of testing. Meanwhile, Eastlick's experience in reviewing various technology products over the past two years and working in quality assurance for a software company endows him with a discerning eye for assessing functionality and performance. Together, Palmer and Eastlick provide thorough evaluations that empower consumers to make informed purchasing decisions, finding the most suitable and reliable window fan for their needs.
A great characteristic of a good cooling companion is the ability to quietly blend into the background.
A comprehensive testing procedure is necessary to give our readers the most reliable buying advice on the latest window fan products.
Our team at GearLab will always find innovative ways to reveal the true capabilities of the products we test.
Analysis and Test Results
In our pursuit of a thorough assessment of each window fan's performance, we conducted rigorous testing across five crucial metrics: circulation, noise levels, ease of cleaning, efficiency, and installation ease. In the following breakdown, we reveal the standout performers in each category, offering valuable insights into the top-performing fans across various dimensions.
What's the Best Value?
In our lineup, we offer multiple options designed to meet diverse needs and budgets, defining value as the balance between performance and price. For budget-conscious buyers seeking a blend of power and dependable circulation, we recommend the Amazon Basics Manual 9" Twin. It is a feasible choice that is both a simple and effective cooling solution. The Bionaire Premium Digital 8.5" Twin emerges as an outstanding choice for those seeking a more comprehensive quality at a higher price point. It offers a well-balanced, high-quality fan with exceptional silent operation, making it ideal for those prioritizing a peaceful environment alongside efficient cooling. It's worth mentioning the powerful Air King as it stands apart due to its high cost, more than quadrupling other products in this line up. That being said, we know that air conditioning bills can build up quickly, so although the investment is high, it has proven to tackle multiple rooms throughout the house, solving a growing problem with trying to regulate large spaces.
Our experienced testers crafted unique testing regiments that reveal the capabilities of each fan.
Credit: Natalie Kafader
Power and Circulation
For this metric, our focus is on gauging the efficiency of each window fan in circulating cool air within a room. We set up a specific room for testing purposes and strategically placed the fans at different distances and heights. By employing lines of fringe to establish distances, we assessed whether we could detect airflow from each fan across the room while also observing its effect at various levels. This methodology enables us to analyze how well the fans maintain comfort across a range of room sizes. Our aim is to offer practical insights into the power and air circulation capabilities of each fan, assisting you in choosing the most suitable option for your needs.
In regards to overall room circulation, the Air King 9166F 20" showcased exceptional performance, creating a noticeable breeze that quickly permeated the room. Our testers reported feeling the airflow almost immediately upon activation, likening it to a vigorous whirlwind. The fan effectively circulated air throughout the space, providing a refreshing atmosphere akin to being outdoors on a breezy day.
Our testers laid out colorful foil fringe across the multi-purpose test room and established a grid with predetermined distances.
Credit: Austin Palmer
Following as a distant second, the Bionaire Premium Digital 8.5" Twin fan offered an impressive cooling experience. Our testers noted a distinct feeling of cool air flowing past them, registered by the fringe that was flickering back in their direction as a nice visual confirmation. The room ambiance felt notably windier, albeit not at the intensity level of the Air King, yet still surpassing typical window fans in circulation efficiency.
For this metric, the Air King holds a significant advantage over all competitors.
Credit: Austin Palmer
Lastly, the Amazon Basics Manual 9" Twin, while delivering a modest airflow, succeeded in cooling down the room by drawing in cooler air from the warehouse. Although the airflow sensation wasn't as pronounced as with other models, users still can experience a noticeable cooling effect, fulfilling the primary objective of a window fan to bring in fresh outdoor air for indoor comfort.
In our cubic feet per minute (CFM) testing, we employed a standardized procedure, constructing a CFM test box to ensure consistency across evaluations. Fans were set to their highest speed, and we sealed gaps around the fan to replicate the airflow performance you would experience at your home. An anemometer positioned about 23 inches from the bottom of the box recorded airflow in ft/min. Among the tested fans, the Air King Whole House fan demonstrated exceptional CFM performance, surpassing the Bionaire Premium Digital 8.5" Twin and the Amazon Basics Manual 9" Twin by a significant margin and almost tripling the average others where able to move. The Bionaire and Amazon Basics both came in at 755 CFM, securing a tie next in line that still impressed us while testing. Not far behind, the Genesis A1 Window Fan recorded a commendable average of 669 CFM. The ability to move that much air in an instant translates to a cool oasis, allowing you to feel relaxed rather than muggy and disgruntled.
Our next sub-metric, thrust, similarly revealed the Air King 9166F 20" Whole House, Amazon Basics Manual 9" Twin, and Bionaire Premium Digital 8.5" Twin as top performers. To conduct our testing, we devised a makeshift thrust rig inspired by Matthias Wandel from Wood Gears. The setup involved ensuring the arms of the rig were square before placing the fan on it in a manner that the airflow would trigger the arm on the scale. Using this rig, we systematically tested each fan on its various settings, recording both the weight and Watts to assess power. This method allowed us to comprehensively evaluate the thrust capabilities of each fan, providing valuable insights into their performance.
This makeshift Thrust Machine, inspired by Matthias Wandel's design from WoodGear, assisted us in refining our thrust sub-metric.
Credit: Natalie Kafader
Noise
We thoroughly examine the noise output of each product, ensuring a comprehensive assessment for prospective users. Beginning with a standardized approach, we positioned the sound pressure level (SPL) meter consistently at a distance of 3 feet from the airflow to yield accurate and comparable measurements across all models. Following this, we conducted a detailed side-by-side comparison of each fan, carefully noting the acoustic characteristics exhibited at low and high-speed settings. Our analysis extended beyond mere decibel readings, encompassing nuanced observations of factors such as pitch, steadiness, and any discernible operational sounds like clicking, whirring, or vibrations. Recognizing the significance of perceived noise over raw decibel levels, we emphasized the importance of capturing the real-time experience of sound for potential users.
The Vornado Transom emerges as the top performer in the noise level sub-metric, earning high praise from testers for its exceptionally quiet operation. We recorded the device at a faint reading of 48.4 dBA. We noted its subdued noise output, highlighting its remarkable tranquility compared to other models. If a nondistracting fan is a priority, the Vornado Transom will not disappoint, as it is barely perceptible and devoid of any significant annoyances.
Noise testing is just one of the many factors we considered while creating the best review out there.
Credit: Natalie Kafader
Meanwhile, the Sharper Image Portal Airbar also exhibited commendable quietness. We recorded only 50.6 dBA on high with a unique sound that reflected more of a tube spinning than a fan blade. Regardless, we were pleased with the output, as it receded into the background, not affecting our conversations in the test lab.
A good window fan should be a fan that can blend flawlessly into any environment.
Credit: Natalie Kafader
Cleaning
With prolonged use, every fan is bound to accumulate dirt. Therefore, it's crucial to consider the ease of cleaning when evaluating overall performance. Our evaluation scrutinized the simplicity with which users could detach and reattach coverings, with a particular focus on the removal of blade assemblies and accessibility to the inner sections of the front grille. Fans that facilitated easier removal of the grille and its components were awarded higher scores, highlighting their user-friendly design tailored for maintenance purposes. This metric was devised to offer valuable insights into the practicality of cleaning, recognizing the significance of hassle-free maintenance in ensuring an optimal user experience.
The Air King 9166F 20" stands out for its straightforward disassembly process, despite the manufacturer's warning against it. Testers found it remarkably easy to dismantle, requiring the removal of just eight screws to lift out the grille effortlessly. While there were some minor issues with screw tightening upon reassembly, overall, the accessibility for cleaning was great, particularly highlighting the simplicity of cleaning the small bar grille.
The Air King was by far the easiest to dissemble and clean.
Credit: Austin Palmer
On the other hand, Sharper Image Portal Airbar and Vornado Transom made a simple task difficult. Both these fans have similar designs that differ from the conventional dual-blade construction that many others use in this selection. As a result, the manufacturers do not advise deconstruction, as you'll find too many little parts to keep together. We agree. It's a pain to take apart and doesn't allow you to disassemble the main components for easy access to cleaning. You're stuck with a damp cloth or utilizing a vacuum attachment to get rid of the dust accumulation. If you like a thorough spring cleaning of your fan from time to time, then you may want to seek a more simplistic design.
The Amazon Basics Manual showed impressive ease of cleaning meeting users' maintenance needs effectively.
Credit: Austin Palmer
Energy Use
These machines can become integral in your cooling needs, requiring them to run for days on end to combat the hot summer heat that is knocking at your doors. Does the high use demand correlate to high cost? We want to break down the additional costs that may not be present at your time of purchase to help paint a better picture of the cooling tradeoffs with each fan. We took the average kWh reading on the highest setting from a Kill-A-Watt meter, then extrapolated the usage as if it were on for 12 hours a day for 90 days straight. After crunching the numbers, we didn't see a large bill accumulation from these fans, but there were a few that stood out as a definite aid to your wallet. Additionally, while energy usage is a good place to start for fiscal planning, we also took into account the energy efficiency of each machine, comparing the thrust power to watt usage and giving us a ratio to analyze across the board.
Energy efficiency is the ratio of thrust power to watts used.
Credit: Austin Palmer
The Vornado Transom demonstrated a low energy cost over the estimated 90 days of $4.94 from a 30.6 kWh consumption, with an efficiency ratio of 1.82 newtons per watt. These are favorable numbers to not only help keep costs down but ensure your money is put to good use. As you might expect, on the other end of the spectrum, the Air King's powerful output resulted in a hike up in energy cost estimated at $23.24 for the set time. However, when we looked at the energy efficiency of this fan, we were surprised to find a high ratio. So, although the Air King does consume more than others in the lineup, it produces complementary power to get the job done, cementing our impressions with its ability to solve whole-house heat waves.
Our team strives to provide as much data as possible to ensure that you can make the best decision possible.
Credit: Natalie Kafader
Installation
Our last metric tested the convenience and simplicity of installing each unit. This sub-metric was integral in providing users with valuable insights into the practicality of setting up these devices.
The Amazon Basics Manual 9" Twin model demonstrated a relatively straightforward installation process due to its zip tie-like curtain lock system, which was easy to manipulate. A recommended approach involved extending one side of the curtain before the other, using thumb or finger pressure to ensure proper fitting. Closing the curtains proved equally hassle-free, with testers noting the effortless sliding motion of the fan to each side.
While performance holds greater importance, it's essential to consider installation ease before purchasing any window fan.
Credit: Natalie Kafader
Similarly, the Bionaire Premium Digital 8.5" Twin, Genesis A1 Window Fan, Holmes Digital Window Fan, and Holmes Manual Dual 8" Blade Twin models all showcased straightforward installation procedures, making them close seconds to the Amazon Basics model. Overall, these findings offer consumers valuable guidance in selecting window fans that align with their preferences and installation requirements.
We put each product through a standardized set of high testing standards to give you a proper comparison in performance.
Credit: Natalie Kafader
Conclusion
As far as window fans go, a one-size-fits-all solution is elusive, as each space presents its own set of requirements and preferences. Understanding this inherent diversity, we undertook a thorough and exhaustive testing process in this comprehensive review. Our methodology involved a deep dive into the intricacies of each window fan, unveiling their individual strengths and identifying any potential weaknesses. This inspection extended beyond mere functionality, encompassing aspects such as noise levels, ease of cleaning, energy efficiency, and installation ease. Use this review as a guide to choose your cooling system that is specific to your needs. We hope to help you craft your oasis at your home or office.
