Hood Fan Size Calculator

Formula

To calculate the Hood Fan Size (F):

\[ F = \frac{(V \cdot A)}{60} \]

Where:

\(F\) is the Hood Fan Size in Cubic Feet per Minute (CFM)
\(V\) is the Kitchen Volume in cubic feet
\(A\) is the Number of Air Changes per Hour

What is a Hood Fan?

A hood fan, also known as a range hood or exhaust hood, is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, odors, heat, and steam from the air by evacuation of the air and filtration. Hood fans are essential for maintaining good indoor air quality and ensuring a comfortable cooking environment. They come in various sizes and capacities, and the appropriate size is determined based on the kitchen volume and the required number of air changes per hour.

Example Calculation 1

Let's assume the following values:

Kitchen Volume (\(V\)) = 1000 cubic feet
Number of Air Changes per Hour (\(A\)) = 10

Using the formula:

\[ F = \frac{(1000 \cdot 10)}{60} = 166.67 \text{ CFM} \]

The Hood Fan Size is 166.67 CFM.

Example Calculation 2

Let's assume the following values:

Kitchen Volume (\(V\)) = 1500 cubic feet
Number of Air Changes per Hour (\(A\)) = 12

Using the formula:

\[ F = \frac{(1500 \cdot 12)}{60} = 300 \text{ CFM} \]

The Hood Fan Size is 300 CFM.