Rule #1: Summer Ceiling Fan Direction
Ceiling fans make you feel cooler in the summer by creating an artificial breeze that evaporates moisture from your skin. This allows you to set your thermostat higher, saving money on air conditioning bills.
When a ceiling fan spins counterclockwise (while looking up at it), the slant of the blades pushes air down and creates a wind chill effect, causing a noticeable breeze. The faster the fan spins, the cooler you feel. This is particularly useful in rooms where people spend a lot of time, such as living rooms and bedrooms, and can help cool your house without AC.
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This cooling effect doesn’t change the temperature of the air, it only makes you feel cooler. That is why you should turn the fan off when the room is empty. Otherwise, heat from the motor will actually increase the temperature in the room.
Rule #2: Winter Ceiling Fan Direction
Ceiling fans can produce the opposite effect in the winter by gently circulating hot air that is trapped near the ceiling.
Since heat rises, the temperature near the ceiling is greater than at floor level. This is particularly true in houses with high ceilings or those with heating systems that do not circulate the air.
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The reason the fan is set to spin clockwise on low is to keep from creating a strong draft, which would cool you down just like it does in summer. Instead, the fan is pushing the air near the ceiling up and outward, causing it to circulate down near the perimeter of the room.
Changing the Rotation of a Ceiling Fan
Ceiling fans can come in various shapes and sizes, but most models will have a switch that allows you to change the rotation direction. However, some models may not have this feature, so check the manufacturer’s instructions before purchasing.
Changing the direction of your ceiling fan will not affect the temperature of the room, but it will affect the airflow.
How Ceiling Fans Can Cut Energy Costs
By setting your ceiling fan to the correct direction, you can cut your energy costs and keep your home comfortable at the same time.
If you use air conditioning to cool your home, a ceiling fan will allow you to raise the thermostat setting about 4 degrees Fahrenheit with no reduction in comfort, according to energy.gov.
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This can result in significant energy savings on your cooling bills. During the winter months, you want your ceiling fan to rotate clockwise. This will create an updraft that circulates warm air that has risen to the ceiling. This helps to distribute heat throughout the room, making it feel warmer and more comfortable.
How Ceiling Fan Efficiency is Measured
Ceiling fan efficiency is measured by the amount of airflow generated per unit of electricity consumed. It’s typically measured in terms of its airflow efficiency and its electricity efficiency.
The combination of both airflow efficiency and electricity efficiency determines the overall energy efficiency of a ceiling fan. The higher the energy efficiency rating, the more energy-efficient the fan is, and the more cost-effective it is to operate.
Choosing the Correct Ceiling Fan
Ceiling fans are ideal for rooms with at least eight-foot high ceilings. For optimal performance, the blades should be 7-9 feet above the floor and 10-12 inches from the ceiling. When installing a fan, the blades should be at least 8 inches away from the ceiling and 18 inches away from the walls.
Larger ceiling fans are better for bigger rooms because they can move more air than smaller fans. For rooms up to 225 square feet, a 36- or 44-inch diameter fan is sufficient, while rooms larger than that should use fans that are 52 inches or more. Multiple fans are ideal for longer rooms over 18 feet.
Further Reading
- How to Install a Paddle Ceiling Fan
- Installing a Paddle Ceiling Fan
- How to Stop Wobble and Vibration in a Paddle Ceiling Fan
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