6 Best 20 Inch Box Fans of 2026
We compared six 20 inch box fans on airflow, motor, controls and price.
By Daniel Brooks
Updated October 28, 2026
The 20 inch box fan is the classic size: big enough to cool a bedroom or living room and just right for a standard window. Our list of the best 20 inch box fans compares six models on airflow, motor, controls and price.
To browse every model we cover, visit our Box Fans page.
All Products Compared
| Product | Best For | Size | Speeds | Airflow | Controls | Build |
|---|---|---|---|---|---|---|
| Hurricane Classic Box Fan | Overall | 20 inch | 3 | 2400 CFM | Dial | Slim polymer frame |
| BLACK+DECKER 20 Inch Box Fan | Known brand | 20 inch | 3 | Over 1200CFM | Rotary dial | Copper motor, carry handle |
| Genesis 20 Inch Box Fan | High velocity | 20 inch | 3 | High velocity | Dial | Copper motor, carry handle |
| Comfort Zone 20 Inch Box Fan | Budget | 20 inch | 3 | High-performance blades | Rotary dial | Carry handle |
| PELONIS Box Fan for Bedroom | Efficient | 20 inch | 3 | 2295 CFM | Manual dial | 5 blades, copper motor |
| Seasons Comfort 20 Inch Box Fan | Front controls | 20 inch | 3 | 5-blade design | Front-mounted | ETL listed, 5-foot cord |
| Award | Product | WikiCooling Score About WikiCooling ScoreThe WikiCooling Score is our own rating from 0 to 10, based on the criteria described on our How We Review page. It reflects research, not laboratory measurement, and is never influenced by manufacturers, retailers, or affiliate commissions. Learn more › | |
|---|---|---|---|
| Best Premium |
Hurricane Classic Box Fan
|
Buy | |
BLACK+DECKER 20 Inch Box Fan
|
Buy | ||
Genesis 20 Inch Box Fan
|
Buy | ||
| Best Overall |
Comfort Zone 20 Inch Box Fan
|
Buy | |
| Best Value |
PELONIS Box Fan for Bedroom
|
Buy | |
| Best Budget |
Seasons Comfort 20 Inch Box Fan
|
Buy |
Top 3 20 Inch Box Fans Reviewed
#1 Hurricane Classic Box Fan: Best Overall
Why We Picked It
Hurricane’s Classic is a 20 inch floor box fan rated at 2400 CFM and 1100 RPM, with three quiet speeds and a slim frame that stores easily.
Hurricane is a hydroponics brand, and its Classic box fan is built to keep air moving in grow rooms, gyms and workshops as well as bedrooms. The listing rates airflow at 2400 CFM at 1100 RPM, which is more than most standard 20 inch box fans claim. Three speed settings cover a gentle breeze through a strong draft, and Hurricane describes them as quiet. Lightweight polymer blades and a slim frame with adjustable feet keep it at 7 pounds and easy to slide into a closet at the end of summer. It is a plain, honest fan that moves a lot of air for the money.
Key Specifications
- Size: 20 inch
- Airflow: 2400 CFM
- Motor Speed: 1100 RPM
- Speeds: 3
- Blades: Polymer
- Weight: 7 pounds
- Dimensions: 20 x 20 x 3.5 inches
| Pros | Cons |
|---|---|
|
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Things to Consider
Its ventilation focus makes it a good pick for clearing stale air or fumes from a garage or basement, not just cooling a bedroom. The white version is usually the cheaper of the two colors.
Best For
This box fan is best for bedrooms, basements and workshops.
Check the current price and availability of the Hurricane Classic Box Fan on Amazon.
Read our full Hurricane Classic Box Fan review.
#2 BLACK+DECKER 20 Inch Box Fan: Best Known Brand
Why We Picked It
BLACK+DECKER’s BFB20SW is a 20 inch box fan with an 80W copper motor rated at over 1200CFM, three speeds and a 6 ft. cord.
This BLACK+DECKER box fan is a straightforward 20 inch fan from a brand most people know. Its copper motor delivers up to 80W of power for over 1200CFM of airflow, and three speeds are set from a mechanical rotary dial. At 20.67 x 4.13 x 21.06 inches and 7.05 lbs it is slim enough to sit in a doorway or window frame and light enough to carry to the garage. Stabilizing plastic feet keep it steady on the floor, the carry handle is built in, and a 6 ft. cord gives you more reach than many budget fans. BLACK+DECKER suggests it for bedrooms, offices, garages and basements.
Key Specifications
- Size: 20 inch
- Airflow: Over 1200CFM
- Power: 80W copper motor
- Speeds: 3
- Cord: 6 ft.
- Weight: 7.05 lbs
- Dimensions: 20.67 x 4.13 x 21.06 inches
| Pros | Cons |
|---|---|
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Things to Consider
The slim 4.13 inch depth lets it stand in a doorway to push air between rooms. A black version is also sold. For a bedroom, run it on low at night and turn it up during the day.
Best For
This box fan is best for garages, basements and general home use.
Check the current price and availability of the BLACK+DECKER 20 Inch Box Fan on Amazon.
Read our full BLACK+DECKER 20 Inch Box Fan review.
#3 Genesis 20 Inch Box Fan: Best High Velocity
Why We Picked It
Genesis’s G20BOX is a 20 inch high velocity box fan with a durable copper motor, three energy efficient speeds and a carry handle.
Genesis calls its G20BOX a high velocity box fan, and the copper motor is built for long-lasting performance with a strong top speed. Three energy efficient speed settings cover the usual low, medium and high, and Genesis says the motor holds up well whatever the weather. The fan rests on any flat surface, so it works as a floor fan in a living room, a bedroom fan or a garage fan, and the carry handle makes it easy to move between them. The black finish is neutral enough to blend in, and a white version is sold too.
Key Specifications
- Size: 20 inch
- Motor: Copper
- Speeds: 3 energy efficient settings
- Design: High velocity
- Carry Handle: Yes
- Model: G20BOX-BLK
| Pros | Cons |
|---|---|
|
|
Things to Consider
Genesis does not publish a CFM figure, so compare it with the Hurricane or PELONIS if raw airflow is your priority. It suits someone who wants a reliable, simple fan. Copper motors are valued for running cool and lasting through long summers of daily use.
Best For
This box fan is best for living rooms, bedrooms and garages.
Check the current price and availability of the Genesis 20 Inch Box Fan on Amazon.
Other Models Worth Considering
Comfort Zone 20 Inch Box Fan. Comfort Zone’s black box fan is a low-cost floor and window fan.
PELONIS Box Fan for Bedroom. This PELONIS bedroom box fan draws 55W for up to 2295 CFM.
Seasons Comfort 20 Inch Box Fan. Seasons Comfort’s FBX20 is a quiet box fan with front-mounted controls.
What to Expect from 20 Inch Box Fans
A box fan is a square fan in a frame that pushes a broad column of air straight ahead. It does not cool the air, but moving air over your skin makes a room feel several degrees cooler, and standing one in a window or doorway can pull fresh air in or push hot air out of a room. Box fans are cheap to buy, cheap to run and easy to store.
For more options, see our guides to box fans and box fans for bedrooms. If you want a fan built to sit in a window with reversible airflow, our window fans page is another option. The product cards show the current price for each fan.
How to Choose 20 Inch Box Fans
Compare Airflow
Airflow is listed in cubic feet per minute, or CFM. Standard 20 inch box fans list figures in the low thousands, while high velocity and metal shop fans list much more. Not every brand publishes a CFM figure, so compare speeds, blade design and motor power too.
Using a Box Fan in a Window
A box fan can stand in an open window to pull in cool evening air or push out hot air. Choose one with a weather resistant motor, block the gaps around it so air goes through the blades, and bring it in or close the window in heavy rain.
Check the Noise
Box fans hum more than tower or pedestal fans, especially on high. If you will sleep with one on, look for a listing that describes quiet operation, run it on low and choose a fan with more speeds or a variable control so you can find a quiet setting.
How We Evaluate 20 Inch Box Fans
We rank box fans on manufacturer specifications and listing details: size, rated airflow, speeds, controls, noise, build and price. We kept only new, in-stock box fans and left out multi-packs, color duplicates, resold third-party copies and accessories such as filter clips and replacement feet. For this list we kept only 20 inch box fans, then weighed airflow, motor and controls.
Frequently Asked Questions
Can I use a box fan in a window?
Yes. Most 20 inch box fans fit a standard double-hung window. Choose one with a weather resistant motor and close the window in heavy rain.
What CFM should a box fan have?
A standard 20 inch home box fan is fine for a bedroom or living room. For a garage or workshop, a high velocity or metal box fan with a much higher CFM rating moves air further.
How do I clean a box fan?
Unplug it, remove the grille if it comes off, and wipe the blades and grilles with a damp cloth. Some fans need the screws removed to open the grille.
How much does a box fan cost to run?
Very little. Most box fans use well under 100 watts, a small fraction of what an air conditioner draws.
Final Verdict
The Hurricane Classic Box Fan is the best 20 inch box fan, rated at 2400 CFM in a slim, light frame. For a well-known brand with a long cord, choose the BLACK+DECKER 20 Inch Box Fan, and for a high velocity copper motor, the Genesis 20 Inch Box Fan.
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.