What is the maximum duct length for a bathroom exhaust fan?Is 20 feet too long to run bathroom fan duct?

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I live in Vermont and we can get a lot of snow, so I don't want to go through the roof unless I absolutely need to.Is it too long a run?

The number of elbows, the size of the room and the fan's power will all affect this.

You will need an Air Change per hour of 8 for a bathroom.You have to choose a fan based on the size of the bathroom and the duct length.

The size of the bathroom is the first thing you have to figure.Simply add Length, Width, and Height to make a total.This will show you the size of the room.

The width is 8 feet and the volume is 10 feet.The volume was 10 * 64.ft.

If you want to calculate the equivalent duct length, you have to consider more than the length of the duct.You need to know the number of elbows and duct construction.The basic rules apply to both duct sizes.

When you have all the information, it's time to pick a fan.You can use a chart like this to do this.

You can find that using this chart.The recommended amount of air changes per hour is 8.