If you are planning to install a range hood in your kitchen, you will need to know the size and airflow requirements for it Rarbgweb. The amount of airflow is measured in cubic feet per minute, or CFM. The higher the CFM rating, the more powerful the vent will be. BTU stands for British Thermal Units and is another measurement of airflow. You need to match the CFM and BTU to ensure proper venting.
The IRC requires range hoods to have at least a 25-CFM continuous exhaust rate and a 100-CFM intermittent exhaust rate Muctau. The code also requires a makeup air system that allows for some airflow to be fed back into the house. This ducting must be installed in the same room as the exhaust system or an adjoining room that has permanent openings to the kitchen Newshunttimes.
Residential range hoods have a maximum capacity of 2000 CFM. You can calculate the number of CFM you need by multiplying the total BTUs by 100. For example, a three-foot-long range needs a range hood with 300 CFMs. In some cases, however, lower CFM levels can be possible with proper ducting and recirculation uplikes.org.
The location of the range hood is another factor. A range hood that is too high or too low will prevent you from cooking in the kitchen. Additionally, one that is too low will impede the circulation of air, and one that is too high may not be effective at removing cooking odors. Ideally, the height of a range hood should match the design scheme and lifestyle of the kitchen roobytalk.com. The right height depends on the size of the range, how much space it will take up, and how often it will be used naasongs.net.