Choosing the right CFM (Cubic Feet per Minute) rating for your range hood is crucial for effective kitchen ventilation. However, the ideal CFM largely depends on your cooktop type. Here is a breakdown of CFM recommendations for common cooktop configurations.

Gas Cooktops

Gas cooktops produce significant heat, grease, and combustion byproducts like carbon monoxide. For gas ranges, experts recommend a minimum of 100 CFM per 10,000 BTUs of burner power. For a typical 36-inch gas cooktop with 60,000 total BTUs, you need at least 600 CFM. However, high-output burners may require 800 to 1,200 CFM. A rule of thumb: for every linear foot of cooktop width (e.g., 36 inches = 3 feet), aim for at least 200 CFM. So a 36-inch gas cooktop needs at least 600 CFM, while a 48-inch unit may need 1,200 CFM.

Electric and Induction Cooktops

Electric coil and induction cooktops produce less airborne grease and no combustion gases. For such units, a lower CFM is acceptable. For a standard 30-inch electric cooktop, 400–600 CFM is usually sufficient. For 36-inch models, 500–700 CFM works well. Induction cooktops heat the pan directly, so less steam and oil vapor escape into the air, but proper capture area remains important. Note that induction cooktops can still generate significant steam from boiling, so 600 CFM is a safe baseline for most residential models.

Commercial-Style and Dual-Fuel Ranges

These units often combine high-BTU gas burners with electric ovens and wide cooktop surfaces. They require the highest CFM ratings. For a 48-inch commercial-style gas range, you may need 1,200 to 1,500 CFM. Some even require 1,800 CFM for heavy wok cooking or multiple high-heat burners. Such high CFM hoods (above 600 CFM) may require a makeup air system to balance home pressure and maintain indoor air quality.

Key Considerations

Always measure your cooktop’s total BTU output, not just width, when selecting CFM. Place the hood at recommended heights (24-30 inches for gas; 18-24 inches for electric/induction). For any hood over 600 CFM, check local building codes for makeup air requirements. Finally, consider quietness: higher CFM often means more noise—look for sone ratings under 6.0 for comfortable operation. By matching CFM to your specific cooktop type, you ensure fresher air and better cooking performance.