Box Fan Wattage Guide: How Many Watts Does it Use

How Many Watts Does it Use
During the hot summer and periods of heat, a box fan is the best option to ventilate the living room, bedroom, and other spaces. It not only could cool down any room in your house efficiently but also improve the indoor airflow. But how efficient is the box fan? Each box fan is designed for different purposes, with multiple modes of blowing wind. Today, I will cover the topic of the efficiency of the box fan.

How Many Watts Does a Box Fan Use Per Hour?

Generally, the common box fans in the market consume between 50 to 100 watts of power. The mini box fans consume about 27W per hour, while the larger one could consume over 100 watts per hour. On average, a typical box fan consumes about 75 watts per hour when they are running at full speed.

You may wonder why the consumption of watt range is so wide? It is because a variety of box fans are varied in wattage in the market. Under the condition of the same speed mode, the large box fan consumes more wattage than the small box fans.

How Many Watts Does a Box Fan Use on High?

The consumption of the wattage of the box fans is changeable, affected by multiple factors. The environment is one of the factors that affect the wattage of the box fan. Although the box fans run between 50 to 100 watts, they can go as high as 200 watts as well at a high temperature.

How Many Watts Does a 20-inch Box Fan Use?

The above data is calculated overall. You may wonder about the specific data of the specific size of the box fan. The 20-inch box fan usually is used as a commercial box fan, consumes about 86.5W per hour at full speed, 70.5W per hour at medium speed, 56W per hour at the lowest speed.

How Many Watts Does a 10-inch Box Fan Use?

The 7-10 inch box fans are a type of portable box fan, is most commonly used for personal cooling devices. This size(smaller or equal to 10 inches) of the box fans is usually placed on the desk. The wattage of 7 to 10-inch box fans is about 20-30 watts at full speed.

Box Fan Electricity Cost

Generally speaking, the box fan does not use a significant amount of power. But, you need to know that the consumed watts have a positive correlation with the energy cost. Therefore, the higher watts the electronic fan draws, the higher the energy cost of running. Therefore, if you want to save money, you could purchase a low-wattage box fan or an energy-efficient box fan.
Light Bulb – 60 Watt600
Light Bulb – 75 Watt750
Refrigerator/ Freezer7002200
Sump Pump – 1/3 HP8001300
Sump Pump – 1/2 HP10502200
Water Well Pump – 1/3 HP10002000
Electric Water Heater40000
Space Heater18000
Humidifier- 13 Gal1750
Furnace Fan Blower – 1/2 HP8002350
Furnace Fan Blower- 1/3 HP7001400
Window AC – 10,000 BTU12001800
Window AC – 12,000 BTU32503950
Central AC – 10,000 BTU15003000
Central AC – 24,000 BTU38004950
Central AC – 40,000 BTU60006700
Heat Pump47004500
Laundry Room:
Washing Machine11502250
Quartz Halogen Work Light, 3003000
Quartz Halogen Work Light, 5005000
Quartz Halogen Work Light, 1,00010000
Airless Sprayer – 11/3. HP6001200
Reciprocating Saw9600
Electric Drill – 3/8″, 4 Amps440600
Electric Drill – 1/2″, 5.4 Amps600900
Hammer Drill10003000
Circular Saw – 7-1/4″14002300
Miter Saw – 10″18001800
Electric Grill16500
AM/FM Radio1000
CD/DVD Player1000
Box Fan – 20″2000
Clothes Dryer – Electric54001350
Clothes Dryer – Gas7001800
Microwave Oven – 625 Watts6250
Microwave Oven – 1000 Watts10000
Coffee Maker10000
Electric Stove – 8″ Element21000
Dishwasher – Hot Dry15001500
Food Processor4000
Toaster Oven12000
Electric Can Opener1680
Family Room:
Stereo Receiver4500
Color N – 27″5000
X-Box, Game Cube, Playstation400
Security System5000
1/2 HP Garage Door Opener8752350
Curling Iron15000
Hair Dryer – 1250 Watt12500
Planer/Jointer – b”18001800
Table Saw/Radial Arm Saw – 10″20002000
Belt Sander12002400
Air Compressor – 114 HP9751600
Air Compressor – 1 HP16004500
Office Equipment.
Personal Computer w/ 17″ Monitor8000
Fax Machine650
Laser Printer9500
Inkjet Printer800
Copy Machine16000
Color N – 13″1500
Outdoor Light String2500
Cell Phone Battery Charger250
Inflator Pump50150

How to Reduce Your Box Fan Running Costs

Expecting to buy a low-wattage box fan or energy-efficient box fan, here are two tips to help you reduce more electricity costs.

●Tip 1: Use it Less

This is a simple method. Using fewer means cost less. But this tip is not enforce you not to use the electric box fan. It means you should turn it off when appropriate. If you are leaving the room, you could turn it off. Then you could turn it on when you come back.

●Tip 2: Lower Fans Speed

As you see, the higher speed the box fan runs, the higher wattage it cost. Therefore, you could lower the speed mode of the fan to lower your electricity cost.


The above data is for reference only. When you want to know the actual wattage of your devices, you could check its label which is placed on the backside of the bottom of the fans. Also, you could read the product instruction given by the box fan manufacturer.
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