Experts often recommend going 3 inches wider on each side (e.g., a 36" hood for a 30" stove) for better coverage.

These use charcoal filters to clean the air before blowing it back into the kitchen. They are easier to install but less effective at removing heat and steam. 2. Determine the Right Size

Aim for 100 CFM per linear foot of cooktop width.

To capture all fumes, your hood must be at least as wide as your cooktop. A 30" cooktop needs at least a 30" hood.