The other way around, how many cubic meters per second - m3/sec are in one cubic meter per hour - m3/h unit? 2,268 cubic feet ÷ 4 minutes = 567. In this example, you’ll want a minimum of 567 CFM for this size of the kitchen. The more frequently you cook, the more often you’ll have to clean your grease filters. The smaller the duct size, the less CFM you need and the larger the duct size, the more CFM you need. This answer is a minimum requirement. To ensure that you have enough power, multiply that number by at least 1.5 to find the appropriate CFM. If you have a roof cap, increase your CFM by 40. However, higher CFM ratings require larger diameters of eight to 10 inches. As an Amazon Associate, we earn from qualifying purchases. Here is a formula to help you estimate your CFM based on your ducting: For example, you have 12 feet of pipe, 2 turns and a roof cap: (12’ pipe x 1 CFM) + (2 turns x 25 CFM) + 40 CFM roof cap = 102 CFM. Flow unit conversion between cubic meter/hour and cubic foot/hour, cubic foot/hour to cubic meter/hour conversion in batch, m3/h ft3/h conversion chart. What is the minimum duct size for a range hood? Next divide by minutes in an hour. If you’re sensitive to sound, you should be aware of how loud your range hood will be. A good rule of thumb for estimating duct diameter and CFM requirements is: Keep in mind that you can never have ductwork that is too wide. Remember, your outdoor grill has higher BTUs than indoor cooktops and may have side burners and other equipment that produce more fumes. This means the noisy part, the blower, of the range hood will be further away from you and it will be much quieter. Convert flow rate of cubic meter per hour (m3/h) and cubic feet per minute (cu ft/min) units in reverse from cubic feet per minute into cubic meters per hour. First, determine the volume of your kitchen. Your hood will not be able to do its job if your ductwork is too small, too long, or has too many bends. Take the total BTUs of your cooktop by adding up the BTUs of each burner and divide that by 100 to get the CFM. Some things can help mitigate this, though. Another way to think about the relationship between BTUs and CFM is to divide the total BTUs by 100 to get the CFM you need for your range hood. Instead, look for a range hood that is at least 600 CFM. When shopping for a range hood, it’s important to understand how the volume of your kitchen affects your range hood CFM. This unit-to-unit calculator is based on conversion for one pair of two flow rate units. Take into account the ducting’s length, shape, size, and turns to help you work out your range hood CFM. For the average homeowner, this is a great option. To get the number of cubic feet moved per hour, multiply your kitchen’s cubic feet by the air exchanges per hour. Do you fry foods on high heat? For example, A CADR of 200 cfm (cubic feet per minute) means it can filter 200 cubic feet of air in every minute on its highest fan speed settings. We recommend high-CFM hoods to our customers because they can always use them on lower speeds. More on the different types of blowers here.