Bathroom Exhaust Fan Sizing
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.
Bathroom exhaust fan sizing. Choosing the right cfm size for a bathroom exhaust fan standard fan sizing. Next use your dimensions to calculate the total volume of your bathroom. The size of the bathroom measured in m3 is the most important factor when determining which bathroom exhaust fan you should pick.
Bathroom vent fans are rated for the amount of air they can move measured in cubic feet per. Secondly what hole size is required especially if replacing an existing fan and thirdly does the fan need to be able to connect to duct work. For standard square or rectangular bathrooms.
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. Use a tape measure to measure the length width and height of your bathroom. Calculate the floor area of your bathroom.
How to size an exhaust fan for a bathroom measure the dimensions of your bathroom. The exhaust fan should ideally achieve at least 10 air changes per hour. For bathrooms over 100 square feet exhaust fans can be sized according to the number of.
Sizing for large bathrooms. Use a tape measure to measure each dimension of your bathroom the length. As a general rule of thumb to you can multiply the length of your bathroom by the width and height l x w x h to give you a figure in m3.
By simply inputting into the calculator the dimensions of your room and the type of room application for the fan the calculator will provide you with a suggested general capacity range in cubic metres per hour m3 hr to help narrow down your exhaust. 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. When choosing a ceiling exhaust fan consider the capacity airflow required usually based the room size and its use.
For a rectangular bathroom this is done by multiplying the width and. A ceiling exhaust fan is one of the most popular methods of ventilating a room. A large bathroom with a jetted tub a toilet and a shower a common configuration in new homes would need a 200 cfm ventilation fan such as the broan l200 ventilation fan available from.
How to size a bathroom vent fan today s homeowner tam asks what size exhaust fan should we use in our small bathroom if your bathroom has an 8 ceiling the cubic feet per minute cfm rating for your fan should be as high or higher than the number of square feet in the room. The calculator on this page is provided as a general guide designed to help you select an exhaust fan which may be suitable for your needs. Measure the dimensions of your bathroom.
