Standard range hoods which are mounted below your cabinet but above your range or cooktop are the most popular style of range hoods. These units are usually less expensive but have less capacity in comparison with other range hood styles.
Canopy Pro Style are designed to perform both in function and in form. With more care put into their otuward appearance than in standard hoods, Canopy Pro hoods are usually more highly engineered.
Chimney Style range hoods are commercially acceptable. They are installed above a range or cooktop either on an island or against the wall. These units usually have the most capacity which is why professional chefs rely on them.