We're remodeling our kitchen. Do we really need a range hood?

Yes, you really do need a range hood. Without it, you'll find that your kitchen will accumulate grease and smoke damage and your home will be filled with cooking odors. Many hoods simply circulate the air and they do not vent to the outside. You'll need to check with your local municipality to see if there are regulations for this. Many municipalities now require outdoor venting systems, as they are more desirable from a comfort and safety perspective.