# What size CFM do I need?

## What size CFM do I need?

The rule of thumb is that you need at least 1 CFM per square foot of room area. To determine the square footage of your bathroom, multiply the length times the width. For example, if your bathroom is 6 feet wide and 9 feet long, its square footage is 54. Therefore, it should have a fan rated for at least 54 ​CFM.

## What is a quiet range hood?

The unit of measure is called a sone. A modern refrigerator is roughly one sone. This can be difficult to determine, especially with inexpensive hoods which may not carry a noise rating. A quiet fan will have a rating of 6 or 7 sones, which is roughly 65 decibels, or the level of a conference room conversation.

What size hood do you need for a 30 range?

36 inch
For example, if you have a 30” range, a 36 inch range hood is ideal. 30” is the most popular stove size in today’s kitchens, which is why our 36” hoods are so popular!

How big of a range hood do I need?

The new hood should be at least as wide as the range or cooktop and preferably 3 inches longer on each side. The most common widths are 30 and 36 inches. For optimal performance, install a hood 20 to 24 inches away from an electric cooktop and 24 to 30 inches from a gas cooktop.

### How many CFM do I need for 800 square feet?

213 CFM
That’s why we need to divide the total volume by 60; hence 4,800/60 = 80 CFM. Answer: You need an 80 CFM airflow (for 300 sq ft standard room and 2 ACH)….CFM Chart For Common Room Sizes.

Room Size: CFM (At 2 ACH)
How many CFM for a 700 sq ft room? 187 CFM
How many CFM for a 800 sq ft room? 213 CFM

### What CFM range hood for gas stove?

For gas cooking surfaces or range, a minimum ventilation level of 100 CFM (Cubic Feet per Minute) per 10,000 BTU is recommended. However, the hood must have a minimum of 500 CFM of ventilation power.