Is 50 CFM enough for bathroom fan?
The floor-to-ceiling walls prevent air from circulating to an enclosed shower or a toilet no matter the size of the fan in the main part of the bathroom, so it’s best to install an additional small ventilation fan in the enclosed area. A 50 CFM fan is usually sufficient.
How do I know what size fan I need for my bathroom?
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.
Is it OK to vent bathroom fan into soffit?
It is possible to vent your bathroom fan through the soffit and avoid making a hole in the roof. Usually, a hole in the roof may lead to leaks and other problems. Sometimes it can be difficult to vent a second-story bathroom to the sidewall.
What does 2 Sones sound like?
According to this, 2 sones is equivalent to 37.99 decibels, which is between the volume of a whisper and that of soft music. The measured sound level of a bathroom fan is a great guide, but it isn’t the only factor involved in the actual perceived volume.
Is 80 CFM enough for bathroom exhaust fan?
Choose a fan that can ventilate at least 1 CFM per square foot of room. So, for an 80 square foot bathroom, select an 80 CFM fan. For medium-sized bathrooms, use 80 to 99 CFM bath fans. For large bathrooms that are over 100 square feet but under 150 square feet, use over 100 CFM bath fans.
How do I know if my bathroom fan is strong enough?
A simple way to test your fan’s suction is to take a single square of toilet paper and place it along the fan vent while the fan is running. If the fan holds up the toilet paper, then the fan is working properly.
Where should I vent my bathroom exhaust fan?
The fan exhaust must vent directly to the exterior of the home. Do not put the vent termination in a roof overhang or soffit. Don’t put it on a wall near or under a roof overhang. The moist air that’s belched out by the fan can be sucked right up into the open soffit vents and be drawn into your attic.
How far can you run bathroom exhaust?
Generally a 4 inch flex duct can carry a fan exhaust for up to 25 ft.
How do you calculate the CFM of a bathroom fan?
So, divide 4,032 by 60 (for minutes in an hour) for the desired CFM rating for the exhaust fan, which in this case is rounded up to 68. Another method assumes you have eight-foot ceilings. In this case, multiply your bathroom’s length by its width to determine its square footage, and multiply it by 1.1.
What size exhaust fan do I need for a bathroom?
As a result, you’ll need an exhaust fan with 70 CFM to properly ventilate your bathroom. Ceilings which exceed eight feet in height will require additional CFM. But, if your bathroom is 100 sq. ft. or more in size, the CFM equation is different.
What does the Bath fan calculator do?
The bath fan calculator is standard guide to help you find the minimum fan rating for your specific bathroom. The higher the bath fan rating the more air can be vented out of the bathroom, which means less moisture and mold build-up.
How do I choose the best bathroom ceiling fan?
A fan with the right CFM will draw in enough air to help prevent moisture buildup. Choosing a fan with the right CFM is directly related to the total area of your bathroom and can also be affected by the height of your bathroom ceiling.