How to Calculate CFM for a Gas Range

In order to calculate the proper CFM for your gas range, it is important to have all specification details of the gas range, starting with the BTU rating of each gas burner.

Gathering the necessary information

Start by going to the stove manufacturer's website to find the specifications and BTU rating details of each burner.

Adding up the total BTU rating of your stove

For this example, we will use a gas range with the following specifications:

• 30" Wide gas stove
• 4 Burners with varying BTU ratings
• Burner 1 = 5000 BTU
• Burner 2 = 9000 BTU
• Burner 3 = 18000 BTU
• Burner 4 = 18000 BTU
• TOTAL BTU Rating = 49000 BTU

Based on the example above with 49000 BTU total for the gas range, a range hood with 600 CFM would be recommended. The calculation used recommends having 100 CFM for every 10000 BTU, which would be minimum 490 CFM. However, with high heat operations, it is advisable to go above the minimum. In this case, 600 CFM is what most standard units have and this would be the recommendation.

Summary

For a gas range with 49000 BTU (all burners combined), the recommended CFM would be 600 CFM because the rule of thumb is to have a minimum of 100 CFM for every 10000 BTU of your gas range.