For general effectiveness, multiply your kitchen's volume (Width x Depth x Height) by 10 to find the minimum extraction rate needed per hour. Which Cooker Hood? Buying Guide - Bosch
These vents pull air outside through a pipe. They are the most effective at removing heat and moisture. buy kitchen hood
Experts often recommend going 3 inches wider on each side (e.g., a 36" hood for a 30" stove) for better coverage. For general effectiveness
You need roughly 100 CFM for every 10,000 BTUs of your stove's total output. buy kitchen hood