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What Size Ceiling Fan Do I Need?

Get the Most Out of Your Ceiling Fan by Selecting the Right Size
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Measure the square footage to get right size ceiling fan for your room.Small ceiling fans for small rooms and large ceiling fans for large rooms, or so they say. While this may sound like an ancient proverb, choosing the right size ceiling fan ensures maximum performance, style, and above all – comfort. Here’s how you can select the correct ceiling fan size for any room in your home.

 

Are you unsure of which type of ceiling fan best suits your home’s structure and style? Read Del Mar Fans & Lighting’s guide to selecting the right type of fan.
Find the Square Footage of the Room

A ceiling fan’s size is proportional to the room size. To determine the room size, use a tape measure to measure the width and length of the room. Multiply the width and length dimensions to find the total square footage (e.g. 12’ x 12’ = 144 square feet). Keep this measurement handy when shopping for a new ceiling fan. The room dimensions are listed on the mounting system details.

 

Consider the ceiling height as well as the square footage. If your ceiling height is less than 8 feet, choose a low profile ceiling fan.

 

If your ceiling height is more than 10 feet, choose a ceiling fan downrod that will allow the fan blades to hang at least 7 feet above the floor. See Del Mar Fans and Lighting’s selection of ceiling fan downrods.

How To Measure a Ceiling Fan's Blade Span

Once you know the total square footage of the room, determine the ceiling fan size by measuring the blade span on an existing fan. The blade span, also known as the blade sweep, is the diameter created by the fan blades while rotating. Use a tape measure to determine the fan blade span.

Measure the radius and double the measurement to obtain the blade span.
For ceiling fans with an odd number of blades:
Measure distance from the center of fan to blade tip. This is the ceiling fan radius.

Double the radius to obtain the diameter (blade span).
Measure the diameter, or total distance between opposing blades, to obtain the blade span.
For fans with an even number of blades:
Measure the distance between opposing blades. This measurement is also known as the diameter or blade span on the fan.
Fan Size by Room Types

Ceiling fan blade spans range from miniature 24-inch blade spans to massive 84-inch blade spans; however, most popular ceiling fans have a 52-inch blade sweep. Here are some recommended ceiling fan sizes for most rooms in your home.
 

Room Sizes and Recommended Fan Size
Additional Ceiling Fan Sizing Tips

Determining the correct ceiling fan size assures functionality and comfort as well as style. Here are some additional tips to consider when selecting a ceiling fan.

 

  1. The minimum recommended distance between the fan blades and the ceiling is 8 - 10 inches. This allows enough space for the fan to draw air through the blades and circulate the air efficiently. The greater the distance between the ceiling fan and the fan blades, the greater the airflow in the room.
     

Minimum distance between fan blades and ceiling

 

  1. The recommended distance between the fan blades and any walls is 18 inches. Verify the fan blades are also the same distance from any cabinets and doors.

 

Minimum distance between fan blades and walls.
 

  1. The recommended minimum distance between the fan blades and the floor is 7 feet. This ensures the safety of anyone on the floor.

 

Minimum distance between the fan blades and the floor.
 

  1. The recommended distance between the ceiling fan blades and a light fixture is 39 inches.

 

Minimum distance between the fan blades and a hanging light fixture.
 

  1. Large ceiling fans weighing over 35 pounds require additional support. The National Electric Code (NEC) requires that the outlet box is rated for ceiling fan use and can support the fan's weight. Choose a mounting system or support brace from the same brand as your ceiling fan to ensure compatability. See Del Mar Fans and Lighting’s selection of ceiling fan mounting systems, which support ceiling fans up to 70 pounds.
     

Ceiling fans weighing 35 pounds or more require additional support.

 

Selecting the right size ceiling fan for your room secures the fan's performance and longevity as well as the comfort and safety of the room occupants. Choose a fan that is proportionate to the room size and provides a sufficient airflow for the room dimensions. The appropriate fan size enhances the look and feel of any room.

 


 

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FB ImageShami Shinde
ideal distance between fan and lights????
October 16, 2013 at 1:42 pm
FB ImageDel Mar Fans & Lighting
Hi Shami, When installing a ceiling fan near a hanging light fixture, allow for a minimum distance of 39 inches between the fan blades and the light fixture. This will prevent the blades from colliding with light fixture. This will also ensure minimal movement of the light fixture.
October 16, 2013 at 3:34 pm
FB ImagePaul N Christine Viana
ceiling fan is 3 to 4 inches from wall is that safe. could I trim the blades
November 5, 2013 at 1:50 pm
FB ImageDel Mar Fans & Lighting
Hi Christine and Paul, Ceiling fan blades are weighed and matched as a set to ensure balance. Trimming the blades will most likely cause your ceiling fan to loose balance and wobble. It seems like your current ceiling fan is too big for the space. We suggest purchasing a shorter blade set from the same manufacturer as your ceiling fan to ensure compatibility and proper distance from the walls. If you are unsure of which blade span to choose, see our room size and recommended fan size table above.
November 12, 2013 at 2:22 pm
FB ImageJames E Joyce
My room is 23 x 17 should I use 2 fans or 1 fan? If I use 2 fans do i still measure the same room size?
February 18, 2014 at 5:51 pm
FB ImageDel Mar Fans & Lighting
Hello James, Thanks for the question. A ceiling fan with a minimum blade span of 56 inches and a CFM rating of 5500 or higher is sufficient for a 23' x 17' room (or 390 square feet). However, if you want to install two ceiling fans, we recommend choosing two fans designed for half of the room size. In this case, two medium sized fans placed at equal distances from the wall. View our selection of medium size fans at http://www.delmarfans.com/ceiling-fans/44-inch-to-50-inch/. We hope this helps.
February 20, 2014 at 10:00 am
FB ImageBharwad Ashok
Hi My room size is 15'×25'( triangle) & 20' hight . which size fan & distance?
March 13, 2014 at 3:13 pm
FB ImageDel Mar Fans & Lighting
Hello Bharwad, Thank you for the question. A ceiling fan with a blade span of 60 inches and a CFM rating of 6999 or higher is sufficient for a 15’x25’ (or 375 square feet) room. A 3 or 4 foot downrod will help as well, unless you have an exposed second floor, then a 18” or 2 foot downrod would be best. Install the ceiling fan in the center of the room for optimal airflow.
March 27, 2014 at 9:26 am