We have a 24" cooktop and this is perfect. We cook a lot of meat because we are on a Carnivore diet, so we make a lot of smoke in the kitchen. This is the only 24" vent with a high CFM and the only one we could find with LED lights instead of halogen lights. We have 9' ceilings and did not need an extension. To clean the baffles all you need to do is dissolve 1/2 cup of OxyClean in hot water in your sink and lay the baffles in the sink. Without any scrubbing the grease just melts off! The design of these baffles is much easier to clean than the traditional screen filters.