# How do you calculate fan size?

## How do you calculate fan size?

Measure the length of one blade from tip to base. Be sure to measure from just above the blade root, as shown, OR from where the blade meets the hub in an assembled fan. Multiply the blade length by two and add that measurement to the hub diameter from step 3 to determine your total fan diameter.

How do you calculate number of fans in a room?

How to Find the Number of Fans? If the size of a ventilated room is 14′ x 12′, a 48′ fan can be suitable to use then. In case of bigger areas like hall, the number of fans can be found by dividing the total area of the room by the area of a single fan.

How do you calculate CFM for a ceiling fan?

By multiplying all three dimensions, you will get the volume of the room. This amount represents the necessary airflow that the fan will have to circulate. Finally, we can calculate the CFM by dividing the room volume using a constant.

### How do I choose the right size ceiling fan?

Buy the Right Size Select a fan with the appropriate span: 36 inches for rooms up to 100 square feet, 42 inches for up to 200 square feet, 52 inches for up to 400 square feet, and either one 60-inch fan or two 52- or 56-inch fans for rooms larger than 400 square feet.

Is a 3 or 4 blade fan better?

4-blade ceiling fans are less noisy and are useful in rooms with an air conditioner, to move the cool air around. They are often more stylish looking. However, 4 blade fans may move air slower than a 3 blade fan and can be more expensive than 3 blade ceiling fans.

Is a 52 inch fan too big?

The ALA recommends a 29- to 36-inch fan for a room up to 75 square feet, such as a bathroom; a 36- to 42-inch fan for a medium-size room up to 144 square feet; and a 50- to 54-inch fan for a room around 225 square feet; 54- and 60-inch or larger fans are available for larger spaces.

## How do you calculate air flow in a fan?

You measure the velocity at a points in the duct and find the average velocity in the exhaust duct is 400 FPM. Multiply 400 Feet per Minute times the area of the duct, which is . 35 square feet, to find 140 CFM exhaust fan airflow. Each fan manufacturer publishes fan performance tables for each fan.

What is the CFM formula?

CFM = (fpm * area), where fpm is the feet per minute. To find the cubic feet per minute, substitute the FPM value with the area after the area is squared.

What is a good cfm for a fan?

On high speed: Good CFM ranges from 4,000 to 5,000. Better ranges from 5,000 to 6,000. Best is over 6,000.

### What size ceiling fan do I need for a 12×12 room?

36″ to 44″
Overview Chart

Room Size Ceiling Fan Size
ceiling fan size for 11×11 room 36″ to 44″
ceiling fan size for 11×12 room 36″ to 44″
ceiling fan size for 12×12 room 36″ to 44″
ceiling fan size for 12×13 room 44″ to 54″

Which brand of ceiling fan is best in Malaysia?

The Top 5 Ceiling Fans in Malaysia

• Panasonic’s NAMI 5 F-M15E2VBHH.
• Eco Breeze EB-6016.
• Deka V5.
• Rubine RCF-CENTRO-3BL.
• Khind CF615.

Which type of fan gives more air?

ceiling fan
A ceiling fan with more blades provides more air. This is a misconception about ceiling fans. The truth is, the amount of air a ceiling fan can produce is dependent on several factors, and not only on the number of blades it has.