Bathroom Exhaust Fan Size Calculator

Bathroom vent cfm calculator uses 3 stage formula located below.

Bathroom exhaust fan size calculator.

Enter bathroom width ft. 10ft 10ft 8ft 7 5 106 67 cfm bathroom fan exhaust size calculator. The exhaust fan removes. Standard fan sizing applies to bathrooms that are 100 square feet or less.

The formula to calculate bathroom exhaust fan size reads as follows. For a standard 10ft by 10 ft bathroom with an 8 ft ceiling you will need an exhaust fan capable of 106 67 cfm. This page is designed to be a general guide for selecting an exhaust fan based on the size of the room and the type of application the fan will be used for. Bathroom fan exhaust size calculator.

Commercial exhaust fans vent air from your kitchen to the outside. Bathroom vent fans are rated by the cubic feet per minute cfm of air they move and should be. A very quiet bathroom fan that will just make a gentle whoosh is a fan at 1. Building code does not specify bathroom vent locations but in any size bathroom it is the most logical to install it over or as close as possible to the plumbing fixture that requires it.

For example if your bathroom is 6 feet wide and 9 feet long its square footage is 54. When installing a vent fan make sure there s at least a 1 2 gap under the bathroom door to allow fresh air to enter the room when the fan is running. All you need to do is select the application from the dropdown enter the size of the room and we will provide you with a general capacity range m3 hr that you should be looking to achieve from the extraction fan. Enter bathroom length ft.

Toilet 50 cfm shower stall 50 cfm whirlpool 100 cfm 200cfm bathroom exhaust fan. Suggested cfm for the bathroom is based on cycling all the air in the bathroom 8 times per hour. The rule of thumb is that you need at least 1 cfm per square foot of room area. Here s how we get this number.

A fan s power is measured in cubic feet per minute so you might think that the next step would be to. This fan calculator is typically used to calculate the cfm or cubic feet per minute of air exchange that may be desired in a building. Simply enter the dimensions of your bathroom in the calculator below to determine the minimum size vent fan you need for the bathroom in your home. To determine the square footage of your bathroom multiply the length times the width.

A bathroom fan is an essential piece of hardware in any indoor bathroom without a window. Any newly installed exhaust fan ducts must be sized according to these sizing specifications. Enter bathroom height step 4. Whether exhausting air or bringing fresh air into a structure the calculation produced should help to figure out the size of fan s required to accomplish the air exchanges needed.

The bath fan calculator is standard guide to help you find the minimum fan rating for your specific bathroom.