Powered boats are becoming more and more like floating mansions. Although built-in vacuum cleaners are common ashore, on a boat they represent another set of ductwork passing through watertight bulkheads. Several manufacturers (e.ggram., Bissell, Dyson, Electrolux, Eureka, Hoover), Filter Queen. Shark) make very compact models. Cordless models use lithium batteries and are usually good for 50 minutes of runtime.