And, while the air in your kitchen and cooking surfaces may be cleaner, a ductless range hood isn't as effective as a ducted model in removing moisture. So you're looking at a likely increase in humidity when using a ductless system.

A ducted range hood is a system that moves air and unwanted particles, such as airborne grease, out of the kitchen entirely. The other type is ductless range hood, otherwise known as a recirculating range hood. In this type, the system takes out unwanted fumes and odors while simultaneously bringing heat and moisture back into the kitchen.