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Defining the Sones Rating A sone is defined as a unit of sound or loudness. Sones are used to measure noise, such as fans, which includes kitchen fans, bathroom fans, and those found in your range hood. One sone is equal to about 1,000 Hz with a sound level about 40 decibels above a normal reference level.
What does 4.0 sones sound like?
A real balancing act! Bathroom fans are measured by sones, a subjective measurement of how a sound is sensed. 4.0 sones is the sound of normal television (which would be ridiculously loud for a normal bathroom fan, though I’ve heard some this loud!).
How many sones is a quiet fan?
Fans rated at 1.5 sones are very quiet, and low-capacity fans rated as low as 0.5 to 1 sones are nearly inaudible. Since central ventilating fans run for extended periods of time, they should be no louder than 1.5 sones if they are mounted in the living space.
What is a good sone rating?
0.3 – 0.9 sones: Fans in this range are also high-performing. 1.0 sone: A 1.0 sone rating is roughly equivalent to the sound of a refrigerator running. 2.0 sones: 2.0 sones is the noise level in a normal office workplace. 3.0 sones: A fan rated at 3.0 sones will be roughly as loud as a face-to-face conversation.
What are sones for bathroom fans?
Bathroom fan sound levels are measured in sones: 4.0 sones is the sound of standard television operation; 3.0 sones is typical office noise; 1.0 sones is the sound of a refrigerator; and 0.5 sones is the sound of rustling leaves. For quiet bathroom ventilation the fan should be rated at 1.0 sones or less.
How many CFM do I need?
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.
How do you measure sones?
Sones are measured on a linear scale, like inches or centimeters. As a linear measurement, doubling the sone level is equivalent to doubling the loudness; quadrupling the sone value quadruples the loudness, etc.Sones to decibels Conversion Chart – How many decibels are in a sone? Sones Decibels 19 70.45 20 71.19.
How many sones is a fridge?
How Loud is a Sone? # of Sones Equivalent Sound 1 The hum of a quiet refrigerator 2 A quiet office 3 A radio or TV playing a comfortable level 4 Normal conversation.
How do sones compare to decibels?
One sone is equal to about 1,000 Hz with a sound level about 40 decibels above a normal reference level. In other words, a sound that delivers over four sones is about four times louder than the normal reference level. However, it’s important to note that two sones don’t add up to 80 decibels.
How do I calculate CFM for exhaust fan?
You measure the velocity at a points in the duct and find the average velocity in the exhaust duct is 400 FPM. Multiply 400 Feet per Minute times the area of the duct, which is . 35 square feet, to find 140 CFM exhaust fan airflow. Each fan manufacturer publishes fan performance tables for each fan.
Which range hood is quietest?
The PLFW 520 is the perfect range hood for your new kitchen. It’s one of the quietest hoods in the industry, at 4.5 sones at max power. It’s incredibly quiet, but doesn’t lack power! It features an impressive four-speed 600 CFM blower that keeps heavy smoke and harmful contaminants out of your cooking space.
Is higher or lower sones better?
The lower the sone rating, the quieter the fan will be. One sone is equivalent to the sound of a quiet refrigerator, so a quiet bathroom exhaust fan will be rated at about 1 1/2 sones or less. Many energy efficient fans will also have low sone ratings, so you can expect them to be quiet.
Is higher CFM better for range hood?
Simply put, the higher the CFM, the more air the hood vents out of your kitchen. To power your range hood, you need at least 100 CFM for every 10,000 BTUs of your stovetop. For example, a 100,000 BTU stove needs at least a 1000 CFM range hood. So, for a 42” electric stove you want a range hood with at least 420 CFM.
What are CFM and sones?
CFM, which is the measurement unit for exhausting air flow, stands for cubic feet per minute. A sone is an internationally recognized measurement unit for loudness that can provide an accurate indication of what humans can hear.
What are sones in range hoods?
Range Hood Sound Levels The sound that a range hood makes is measured in sones. One sone is roughly equal to the sound of a refrigerator running. Normal conversations take place at about 4 sones and light traffic rates up to around 8.
What does CFM stand for in fans?
CFM stands for cubic feet per minute (it is also referred to as airflow). Put simply, CFM is how much air a fan moves. The measurement is taken when the ceiling fan is on its highest speed and uses both the volume of air and the rate at which it moves.
