Holmes Digital Window Fan Review: Electronic Air Exchange
Holmes' digital window fan has independent electronically reversible motors for intake, exhaust or air exchange.
By Daniel Brooks
Updated October 28, 2026
The Holmes Digital Window Fan is a long-running dual-blade window fan with independent electronically reversible motors for intake, exhaust or air exchange, extending to 37 inches. For more models, see our Window Fans page.
Our Verdict
The Holmes is our pick for air exchange: each motor reverses electronically, so one in and one out takes a button press.
The listing gives few specifications, and the design is dated.
Holmes Digital Window Fan
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Holmes |
| Model | Digital Window Fan |
| Fans | Dual blades |
| Reversing | Independent electronic motors |
| Modes | Intake, exhaust, air exchange |
| Fit | Double-hung and slider windows, up to 37 inches |
| Size | About 13.3 x 25.5 x 6 inches |
| Weight | 5 pounds |
Design
It measures about 13.3 x 25.5 x 6 inches and weighs 5 pounds.
An adjustable extender screen and bonus panel extend it up to 37 inches, and it stands vertically in sliders.
Controls
Digital controls set each motor’s direction independently.
Set both to intake, both to exhaust, or one each way to exchange air.
Placement Tips
Measure the window before you install and close any gaps with the expanders or foam provided, so the fan moves air through the blades rather than around them. Use the window lock or a stop if you leave it in an accessible window.
For a cross breeze, run this fan on intake in a window on the cool, shaded side of the house and open a window on the opposite side, or set it to exhaust upstairs to pull cool air in below.
Running Costs and Care
Unplug the fan and wipe dust from the grilles and blades every few weeks during heavy use. Dust buildup cuts airflow and adds noise.
Bring it in or close the window in heavy rain unless the listing says it is weather resistant, and store it clean and dry over winter.
How It Compares
Against the BEYOND BREEZE Reversible Dual Window Fan, both reverse electronically; the BEYOND BREEZE adds a remote.
Against manual twin fans, the Holmes saves flipping or rotating heads.
Pros and Cons
| Pros | Cons |
|---|---|
| Electronic reversing | Sparse listing details |
| Air exchange mode | No remote listed |
| Fits sliders vertically | Dated design |
| Extends to 37 inches | No timer listed |
| Light at 5 pounds | Plastic build |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Double-hung windows | Anyone wanting a remote |
| Slider windows | Smart homes |
| Air exchange | Low-profile seekers |
| Kitchens | Rainy exposures |
For more options, see our picks for the best reversible window fans and the best window fans under 50.
Final Verdict
The Holmes Digital Window Fan is a reliable dual-motor window fan for air exchange. You can check the current price and details for the Holmes Digital Window Fan.
Frequently Asked Questions
Is it reversible?
Yes, each motor reverses electronically.
Does it fit sliding windows?
Yes, standing vertically.
How wide does it extend?
Up to 37 inches.
How heavy is it?
About 5 pounds.
Does it have a remote?
The listing does not mention one.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.