Cfm needed for bathroom fan

Use our handy online calculator to see what size bathroom vent fan you need for your home. To determine the proper size vent fan you need for your bathrooCalculate the. First you need to measure the size of your bathroom.

To use our fan selection tool (located in the search area to the right of every page) this measurement needs to be in metres.

Bathroom exhaust fans are rated for the amount of air they can move, measured in cubic feet per minute, or cfm.

Standard fan sizing applies to bathrooms that are 1square feet or less.

How to Calculate CFM for Bathroom Fan.

Knowing what size bathroom fan you need is easy to calculate. A properly installed bathroom exhaust fan will rid the bathroom air of excess moisture, humidity, odors and other pollutants. Air movement is typically measured in cubic feet per minute ( CFM ). The first step in determining what size exhaust fan is needed , is to calculate the volume of the room.

Once you know the minimum recommended CFM requirement, compare that with the CFM rating of your existing fan. Pick the quietest one you can afford that has the features and aesthetics you desire. Try to get one that utilizes the same vent size, . Make sure you check out the end of the article . The following table does lots of the math for you.

Just multiply the length of the room by the width.

There is no window to help out the ventilation and my wife is threatening to send me to the closest gas station! Submitted by DM from Winnipeg, Manitoba, Canada. Use the room size to determine the necessary cubic feet per minute ( CFM ) rating of the fan. The CFM rating measures the volume of air the fan moves.

This window need only be half-openable.

The bathroom fan should pull out at least cubic feet per minute ( cfm ). And because windows provide light as well as ventilation, if you go the fan -only route you need to install artificial . The airflow rate for bathroom ventilation fans is expressed as the number of cubic feet per minute ( CFM ) of air moved. The higher the number, the more air the fan will remove from your bathroom.