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In this Lasko window fan review, you will get a comprehensive comparison of features between various Lasko window fans. All of these fan units have their own advantages as well as disadvantages. We will compare their features, pros, and cons to see which fan is the most impressive one.

Lasko 2155A Electrically Reversible Window Fan (video)

Lasko 2155A is an adjustable window fan which has been approved by the ETL (Electrical Texting Laboratory). This unit is a durable machine and designed in such a way that it can fit in windows of various sizes ranging from 26.5 to 34.5 inch width and 22 inch height. Although this unit is a giant when compared to other fans but noise production of this model is minimal. Lasko 2155A is an electrically reversible window fan, which enables it to be used for either air flow or exhaust purpose.


  • Dimensions 26.5 x 22.5 x 9 inches
  • 14 pounds weight
  • ETL listed
  • Three speed settings fan
  • Blade has 3-paddles (each paddle of 16 inches)
  • Built-in side panels for custom fit
  • Capacity to fit in windows of 26.5 to 34.5 inches width and at least 22.5 inches height
  • Windows can be closed from behind when fan is not in use
  • Reversible air flow technology


  • Quiet operation
  • Capability of custom fitting
  • Durable product
  • High powered fan
  • Can work as exhaust fan or as intake fan
  • Easy to clean
  • To prevent bugs or dust, windows can be closed from back when fan is off


  • Large size requires a lot more space than usual
  • No thermostat
  • Cannot direct air flow due to immovable grills
  • Cannot be used on the floor


This large size Lasko window fan is not the Rolls Royce of fans but it is an acceptable fan which comes at an affordable price. Less noise production and good air movement are some key features of this model.

Lasko Window Fan Review: Lasko 2155a ReviewUsually you won’t be able to open and close your windows, like you would normally, after the installation of a window fan, but this unit is specially designed to fit in the windows without forcing you to keep them open. This means that you can close your windows whenever you’re not using the fan to keep the bugs out.

Another great thing about this fan is its reversible technology which lets you choose between exhaust or air flow options for your fan. This makes this product flexible enough to be used in kitchen as well as in bedrooms. Also, its speed control settings (Low, medium and high) lets you adjust its speed as per your requirements.

When we take a look on other side of the picture, this model has some noticeable flaws too. Absence of thermostat and immovable grills, to direct air towards a particular direction, are proven to be a major issue for many customers. But overall it’s a good choice for people having spacious rooms but limited financial resources.

Lasko 2155a Review Video

Now, watch the fan review video made by the manufacturer.

Lasko 2137 Twin Window Fan

This Lasko twin window fan is a compact two speed fan. Along with the conventional installation in the window, it can be used on the floor as well, thanks to snap-on feet, which allow it to stand on ground or any other surface. Also adjustable extender screen makes it a perfect fit for windows of 22 to 34 inches of size. Both of its fan operate in the same direction. It’s less weight and small size not only makes it portable but it also is really quiet when compared to regular fans.


  • 21.8 x 4.5 x 10.5 dimensions ( inches)
  • Shipping weight 5.9 pounds
  • ETL listed
  • Small sized fan
  • Noise is minimal
  • Two speed control settings
  • Paddle of blades are of about 6 inches
  • Can be applied in a window or placed on a table
  • Adjustable in 22 to 34 inches wide windows


  • Small size
  • Operate at two speeds
  • Twin fans for extra airflow
  • Affordable price
  • Can be used as a window fan or a table fan
  • Produce less noise
  • Built-in adjustable extenders
  • Can be adjusted according to window size (22 to 34 inches)


  • No thermostat control
  • No reverse technology (fans are one directional unless you flip the whole unit)
  • Twin fans are dependent


A dual window fan, manufactured by Lasko, is a mini pack with wide range of functions. Lasko twin window fan, 2137, is a two speed fan which can operate at either low or high speed. This is designed in such a way that it can be used as a window fan as well as a table fan.

Although this model consists of two fans but they manage to keep the power of this fan to a satisfying level. Even with its small size, it’s capable of delivering powerful functionality for its users. Also, it’s extremely efficient at keeping the noise generation at minimum. When one chooses to install it as a window fan it still is flexible enough to be adjusted in different size of windows ranging from 22 to 34 inches.

There are few cons of this specific model as well. It is a one direction fan, which means that to change its function form intake to exhaust, one has to remove it, flip it and then reinstall it again. Lack of thermostat control is also a hindrance in its use for people who desire to have an automated fan which can automatically be adjusted according to temperature change. These shortcomings result in sufficient decrease in its popularity among customers but it’s still a reasonable option for customers who need a one directional powerful small fan at cheap rates.

Lasko 2138 8-Inch Electrically Reversible Twin Window Fan

This dual window fan surely is an impressive product when it comes to features and advantages when compared to others. Its appropriate size which can be further adjusted for windows of size 25-35 inches when combined with its thermostat control make it a distinct product of Lasko manufacturers. Two speed control settings along with the independently working fans made it a real eye catcher. With the help of reversible fan technology, living rooms or kitchens can be kept cool and smoke free. Its specially designed feet lets it adjust on flat surfaces as well.



  • Quiet operation
  • Two speed settings (low or high) according to requirement
  • Enhanced air flow due to twin fans
  • Reversible fan technology
  • Both fans can work as exhaust or in flow or exchange due to independent motor
  • Snap-on feet allow it to be used as a table fan
  • Built-in thermostat


  • Cannot close the window when fan is not in use resulting in dust and insects path of entry
  • Fixed vents prevents airflow from
  • Accordion extenders no well built


This product of Lasko Company is excellent in both efficiency and durability. This model is equipped with many technologies such as thermostat control, airflow reverse technology and independently controlled fan system that makes it a beast in summer seasons. Thermostat control helps in adjustment of speed of the fan in accordance to temperature. Its three speed settings can be adjusted to suit the user’s requirements. Ability of fans to work independently allows the use of the same dual window fan for exhaust, intake or exchange at the same time. It is an adjustable window fan which can be adjusted according to the size of the window (ranging from 25 to 35 inches). Extra advantage of this fan is that it can be used as a table fan along with the conventional window fan use.

This Lasko twin window fan has some flaws that should be kept in mind before going for this fan unit. Fixed vents restrict the choice to direct airflow in a particular direction. Also, you cannot close the window or its grills when you’re not using the fan. This makes it really difficult to keep the bugs out especially in winter season. Its accordion extenders can be troublesome as well because of their poor design. But these flaws can easily be ignored considering the fact that it’s available at a reasonable price.

So, Which Fan Is The Best? Verdict

In this Lasko window fan review, we took a look at three different window fans: one one-motor fan and two twin ones.

Lasko Window Fan Review: Lasko 2155a ReviewAmong all of these models, Lasko 2155A window fan is the first on the list thanks to its reversible fan technology. It is a large triple speed fan capable of delivering powerful airflow. As already mentioned, it is an electrically reversible fan which means it has the ability to work as an exhaust and it can easily be used for airflow as well. Surprisingly, its large size does not result in excessive noise generation.
Lack of thermostat and fixed vents are also points of concern for customers who want to use it in hot regions. Lack of snap-on feet limits the use of fan only as a window fan.

Lasko Window Fan Review: Lasko 2138 reviewLasko 2138 8-Inch twin window fan is at second spot. This dual window fan is a real gem for customers who want to buy an efficient fan at a very reasonable price. This is basically a two speed compact ETL (Electrical Testing Laboratories) approved fan. It has reversible fan technology, which enhance its productivity. A striking feature of this fan is that it can easily be set on flat surfaces as well, credit goes to its snap-on feet. Built-in thermostat is also a great addition in its long list of functionality which definitely increases its worth. This is an adjustable window fan, which can be fixed in 25 to 35 inches wide space thanks to its extender screen.
Few shortcomings of this electrically reversible twin window fan include inability to close windows when fan is not in use. Immovable grills are also a problem in directing air up, down or in the middle.

Lasko Window Fan Review: Lasko 2137 reviewLasko 2137 twin window fan is at third position. It is a two speed (high and low) small fan with reasonable price tag. This fan unit is also approved by ETL (Electrical Testing Laboratories). It has snap-on foot due to which it can easily be used as a floor fan as well. It’s an adjustable window fan which can be adjusted in 22 to 34 inches wide windows because of extender screen.
It is a one directional fan which is a major drawback of this fan. Other cons of this product include lack of thermostat and dependent fans.

So we have listed all the features of three Lasko window fans and compared them in terms of their functionality. Although all of them are amazing at what they are designed for, but Lasko 2138 8-Inch Electrically Reversible Twin Window Fan is the one that offers the most features when compared to others.

We hope you enjoyed reading our Lasko window fan review. Let us know your thoughts in the comments!

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  1. THE DUMBEST THING I HAVE EVER ENCOUNTERED: The Lasko 2138 is SO THICK, front to back there is NO WAY it will fit a standard kitchen window UNLESS the screen is REMOVED! In other words, if you want to use this device in an ordinary window FORGET ABOUT YOUR SCREEN. If I did not see this I would not have believed it. Returning to Home Depot.