Yes, an island rangehood or ceiling-mounted rangehood can be installed above an island cooktop. If underfloor access is available you can even consider a downdraft style rangehood. Island rangehood installation requires careful planning for ducting to ensure proper venting, as the ductwork must run through the ceiling. Ensure that the island hood is wider than the cooktop for maximum effectiveness.   If planning to install an island rangehood as part of your construction project, contact Addison sooner rather than later.