Published at Saturday, July 07th, 2018 - 05:45:38 AM. Range Hood. By Farago.
Excerpt from Range Hood Blower Insert - How to Choose The Correct Size :
Range hood blower insert - On the other end of the spectrum, most of us cook with a typical four-burner range. These throw off one-third the amount of heat as the commercial style monsters, but they still must be properly vented in order for your home to remain odor and germ-free. No matter which type of cooking unit you use, the idea is the same - it's all about airflow. The bad news is there is no absolute formula for determining exactly how much air flow is the correct amount. The good news is that two different methods of calculation can be utilized allowing you as the homeowner to dial the number up or down based on how you live and cook.
Common sense dictates that the more heat a unit produces, the more airflow will be required to rid the greater amount of resulting grease and smoke. Let's call this the Common Sense Rule. That said, the first calculation method we will look at is based on cooking surface size and range hood location. If the hood is mounted on a wall behind the range (as most are), then you will use the 40 cfm per linear foot of cooking surface rule. This method dictates that for a typical 30" four burner range, you should employ at a minimum a hood able to move 100 cfms of air. But remember the Common Sense Rule. If you do a lot of frying or wok cooking and therefore produce an increased level of grease and smoke, you will likely be disappointed with a 100 cfm unit - go bigger. To extend this method to kitchen island cooking, the 50 cfm per linear foot of cooking surface rule should be used. With the same 30" four burner range operating in an island, the minimum cfm's are bumped up to 125, and as always, the Common Sense Rule is applied.
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