Typically, you’ll want your wall mount range hood to be the same or a similar length to your cooktop. For example, if your gas range or electric range is 36 inches long, you’ll want a range hood that is equally long to help with proper ventilation.
Additionally, the larger your cooktop, the higher number CFM you’ll want. The amount of air that is pumped out is measured in cubic feet per minute, or CFM, which is a helpful consideration as you’re deciding which wall mount range hood to buy. If you use your stove often and using each burner at the same time is a common occurrence, we suggest looking for a 700 to 899 CFM wall mount range hood. If you have an electric cooktop or are more of a fan of pizza and takeout than you are of cooking, a 300 to 399 CFM wall mount range hood is perfectly acceptable.