Is it the right size to create the capture zone you need for your cooking appliances.
Kitchen exhaust hood length. The general size and rule of thumb for mua is a 6 hood or larger or 2000 cfm or more of exhaust flow. Also the size of your kitchen exhaust fan and the length of your ductwork will affect the amount of cfm required for your hood. In this article we ll tell you what matters when it comes to your cfm requirements and how to calculate the cfm you need to make sure you re. The size shape length turns and cap on the range hood ductwork adds resistance which reduces the amount of air the vent fan can move requiring additional cfm for the fan.
Hood vents also help remove heat moisture grease and. Use type 2 hoods over equipment that produces heat and steam like dish machines. Hood vents are designed to remove odors in the kitchen caused by cooking. This is one of the most common questions we are asked here at proline.
A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended. One thing you should know before reading on is that range hood power is measured in cubic feet per minute cfm. How to determine what size hood vent is needed for the kitchen. Your kitchen exhaust plan isn t complete without a commercial kitchen hood.
Island hoods typically require the most exhaust volume. After all there are several factors to consider such as the size mount style and ventilation type. Use these hoods over grease producing equipment like ranges and flat tops. If your conditioned air whether heated or cooled is getting pulled out of your facilities at a rate of 2000 cfm or greater it will cost you allot more money in the long run than the initial cost of a mua fan.
The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows. When using smooth round 8 diameter metal pipe add one cfm per foot of pipe plus 25 cfm for each elbow and 40 cfm for a roof cap. Of air per minute require makeup air so they don t depressurize the home and draw combustion gases from the appliance into the living space. If your main mission is to find a range hood that will keep your kitchen clean and grease at bay you ll want to find a range hood equipped with an auto cleaning function.
In homes with naturally drafted fuel fired appliances like a boiler inside the envelope kitchen range hoods that exhaust more than 400 cu. Physical size and mounting height once you know the type exhaust rate and design style you need for your kitchen you also must consider the physical size of the commercial kitchen exhaust hood.