Electric power washers from Water Cannon do not emit exhaust, so they can be used to maintain interior areas. They are available with a 1.5 hp commercial motor that uses a traditional household 115-volt plug. They have a roll cage and water storage tank for added convenience and versatility. They have General Pump TT Series pumps, and are available in strengths from 2 to 3 gpm and 1,200 to 1,500 psi. Standard accessories include a 50-foot hose, trigger gun and wand, chemical injector, and four color-coded spray nozzles and a color-coded chemical nozzle, all with quick connects. 800/333-9274; www.watercannon.com.