How To Compute Correct Size Ceiling Fan To Room Size

What is the all-time ceiling fan size?

Nosotros can agree that yous can't pick only any ceiling fan size. You need to size a fan to how big a room you lot want to put it in. A properly-sized ceiling fan tin provide ventilation and meliorate comfort twelvemonth-round.

We are going to look at all ceiling fan sizes and use a ceiling fan size guide (found below) to fairly pick the size of ceiling fan you demand. A vital part of this process is as well how to measure a ceiling fan size (you volition find a spet-by-step manner for both odd-number and even-number of blades; you lot take to determine the diameter of the blades).

what size ceiling fan do i need chart — Example of how big a fan you need for smaller and standard rooms.

Here's the bargain:

A lot of homeowners become the size of the ceiling fan wrong. They buy a ceiling fan that's either too large or too small. How to determine ceiling fan size? Navigating ceiling fan bract diameters, CFMs, and room foursquare footage is, as you might imagine, not all that like shooting fish in a barrel; hence the sizing mistakes are fabricated.

Instance: What should a ceiling fan size be for a 12×12 room? A 48-inch fan is also big. A 36-inch fan is too small. A 42-inch ceiling fan is just right for a 12×12 room.

As you lot can come across, the size of ceiling fans is measured in the bore of the blades. We talk virtually 36-inch, 42-inch, 48-inch, 52-inch, 60-inch ceiling fans, and then on. In HVAC, however, nosotros primarily focus on airflow generated (measured in CFMs or Cubic Feet per Minute).

The bore of blades (ceiling fan size) is proportional to the CFMs a ceiling fan tin can generate. Adequate ceiling fan sizing merely means that you effigy out how many CFM ceiling fans you need. An easier mode (admitting less accurate) to size a ceiling fan is only to cheque the ceiling fan blade diameter and room square footage.

The ceiling fan size guide below includes both the room sizes (in foursquare feet and width×length), ceiling fan blade size advisable for such rooms, every bit well as estimated CFM airflow output.

Notation: This size guide is valid for standard eight ft ceiling height. Below the chart, we illustrate how to size a ceiling fan for college-than-eight-ft ceiling tiptop. We besides explicate how to mensurate ceiling fan size for an odd number of blades (3-blade, 5-bract fan) and even the number of blades (4-blade, half-dozen bract fans).

On top of that, we also look at ii real-life examples (average chamber and x×10 room) of how to measure the ceiling fan size and estimate how many square anxiety room such a fan can fairly cover:

Ceiling Fan Size Guide

Room Size:	Dimensions:	Blade Size:	Adequate CFM:	Room Example:
Less than 50 sq ft	vi×6, 6×8 rooms	29 inches or less	1000-2500 CFM	Small Bath
50 to 75 sq ft	8×8, x×6 rooms	29 to 36 inches	1200-2800 CFM	Small-scale Room
75 to 100 sq ft	viii×10, x×ten rooms	36 to 38 inches	1500-3500 CFM	Standard Bathroom
100 to 150 sq ft	10×12, 12×12 rooms	38 to 42 inches	2000-4000 CFM	Standard Room
150 to 200 sq ft	12×fourteen, 14×14 rooms	42 to 46 inches	2500-4500 CFM	Large Bathroom
200 to 300 sq ft	15×15, 16×16 rooms	46 to 52 inches	3000-5000 CFM	Big Room
300 to 400 sq ft	18×xviii, xx×twenty rooms	52 to 54 inches	4000-6000 CFM	Modest Apartment
400 to 500 sq ft	20×22, 22×22 rooms	54 to 56 inches	5000-7000 CFM	2 Rooms
500 to 750 sq ft	24×24, 25×25, 26×26 rooms	56 to 70 inches	6500-9000 CFM	3 Rooms
750 to 1,000 sq ft	28×28, 30×xxx rooms	70 to 84 inches	8500-12000 CFM	4 Rooms
i,000 sq ft or more	32×32, 34×34 rooms	84 inches or more	10,000+ CFM	4+ Rooms

This ceiling fan size nautical chart is pretty self-explanatory. Bigger rooms will require ceiling fans with longer blades that tin can generate higher airflows.

Case: Let'due south say you take a 14×xiv bedroom and would similar to know what size ceiling fan you need for such a bedroom. Check the ceiling fan size chart above, expect at 150-200 sq ft size (14×xiv is 196 sq ft), and y'all tin can meet you volition probably demand a 46-inch ceiling fan with about 4000 CFM airflow.

Now, if you already have a fan or you're buying a fan for a sure room, yous will accept to know to mensurate ceiling fan size.

Let'due south await at how we can measure fan bract size:

How To Measure Ceiling Fan Size? (Diameter Of Blades)

We talk about 36-inch, 42-inch, 52-inch ceiling fans, and then on. In short, that is the size of a ceiling fan. When sizing a ceiling fan it'southward quite useful to know how to measure the ceiling fan size.

Note: Do you lot know the unlike directions of blades spinning in the winter vs summertime? You can check the correct clockwise vs counterclockwise direction for both seasons hither.

Namely, we are measuring the bridge of the blades. At that place are two ways how to measure the size of a ceiling fan, depending on a fan having an even number of blades or having an odd number of blades:

Even number of blades ceiling fans. These are 4-blade or 6-blade fans.
Odd number of blades ceiling fans. These are 3-blade or 5-blade fans.

Information technology'due south easier to measure the length across the blades with even number of blades fans. Allow'southward start with fifty-fifty ones, and we'll testify how to practise information technology for odd ones afterwards that.

Here's how to measure ceiling fan size for even number of blades:

End the fan before measuring.
Apply a ladder to achieve the ceiling fan, or dismantle it for easier measurement.
Use a measuring tape. With even blade fans, stretch the measuring tape from the tip of one blade to the tip of the blade opposite the get-go blade.
Label the measured ceiling size.

The procedure is very similar for the odd number of blades, with important differences in the tertiary and 4th step:

Stop the fan before measuring.
Employ a ladder to attain the ceiling fan, or dismantle it for easier measurement.
Use a measuring record. With odd blade fans, stretch the measuring tape from the tip of one bract to the middle of the ceiling fan. You're measuring the radius of a fan.
Use the measured radius of the fan and multiply information technology by 2. The result is the diameter of the fan blades; the ceiling fan size.
Label the measured ceiling size.

how to measure ceiling fan size for odd number of blades — Measuring ceiling fan size for a 3-blade fan.

Here'southward an instance for an odd number fan: Permit's say yous have a 3-blade fan and would like to measure the fan size. Every bit per the tertiary step, yous measure out from the tip of a blade to the center and get the result: 21 inches. This is the radius. Hither is how to become the full size of an odd-number blade ceiling fan:

Size Of Ceiling Fan = 21 Inches × 2 = 42-Inch Fan

If you consult the ceiling fan sizing nautical chart above, you tin run across that a 42-inch fan is appropriately sized to provide ventilation to 150-200 sq ft rooms.

You will have to augment the ceiling sizes a bit if you lot accept a high ceiling. Let's look at how to size a ceiling fan for loftier ceiling rooms:

Loftier Ceiling Rooms (You Will Need A Bigger Ceiling Fan)

Any ceiling fan should provide acceptable ventilation in a room. We primarily base the size of the ceiling fan on square footage. What we shouldn't omit, however, is to account for rooms that take a college than standard 8 feet ceiling height.

A ceiling fan ventilates the air in the room. College ceilings equal more air, and therefore you will demand a bigger ceiling fan in high ceiling rooms. This is to maintain the recommended ACH (Air Changes per Hr) airflow.

Every foot of height higher up 8 ft will increase the ceiling fan CFM requirement past 12.v%. Here'south how much more than airflow will high ceiling rooms require:

Standard 8 ft ceiling top. Instance: 2,000 CFM.
9 ft ceiling meridian needs 12.5% more than airflow. Example: 2,250 CFM.
10 ft ceiling height needs 25% more airflow. Case: 2,500 CFM.
11 ft ceiling height needs 37.five% more airflow. Example: 2,750 CFM.
12 ft ceiling height needs 50% more airflow. Example: 3,000 CFM.
xiii ft ceiling height needs 62.five% more airflow. Example: 3,250 CFM.
14 ft ceiling acme needs 75% more airflow. Example: 3,500 CFM.

CFMs are easier to calculate than the actual ceiling fan blade span. To get make up one's mind the size of the ceiling fan correctly, yous tin can check the CFM airflow output in the chart in a higher place.

In practice, this would hateful that for a 12×12 room with a 14 ft ceiling, the 42-inch fan won't be enough. Yous should opt for a 46-inch or fifty-fifty 48-inch ceiling fan to business relationship for the additional air in the room due to the higher ceiling.

Let'southward solve two examples of how to correctly size a ceiling fan:

Ceiling Fan Size For Sleeping room (Example 1)

An average bedroom size in the Us is 14×xvi anxiety or 224 foursquare feet. How what size ceiling fan do you need for such a bedchamber?

If you have an viii ft ceiling pinnacle, you lot can simply check the ceiling fan size guide for bedroom sizing higher up. Yous can run into that for 200-300 sq ft bedrooms, you crave 46-52 inch bedroom fans (generating 3000-5000 CFM airflow)

Since 224 sq ft is closer to the 200 sq ft mark, y'all volition most likely need a 48-inch ceiling fan for an average bathroom. Such a fan will generate about 3500 CFM airflow and will fairly ventilate your sleeping room.

If you take a college than viii ft ceiling, you will need a bigger ceiling fan for the bedroom. You lot add 12.5% for every extra foot of height, and your options will be in the range betwixt 52-56 inch bedroom ceiling fans.

Ceiling Fan Size For ten×x Room (Example 2)

x×10 is one of the nigh common room sizes. This is basically a 100 sq ft room. What size ceiling fan practice you need for a 10×10 room?

You simply bank check the chart above. 75-100 foursquare anxiety rooms need 36-inch or 38-inch ceiling fans. Since 100 sq ft is exactly the upper range here, you would apparently need a 38-inch ceiling fan for a x×x room.

That's if you have a standard 8 ft ceiling height. With higher ceilings, you're looking at 42-46 inch fans; those college flow ceiling fans will be plenty to ventilate 10×10 rooms with higher ceilings.

Hopefully, this illustrates how you go higher up picking the ceiling fan size.