Designed for indoor cleaning, two new Karcher all-electric, hot water pressure washers provide water flows ranging from 3.5 to 4.2 gpm and pressures ranging from 2,000 to 3,000 psi. Both models require 460-volt, three-phase electrical power. According to Karcher, water is heated in a stainless-steel coil submerged in a tank containing a special water solution designed to produce highly efficient heat transfer. A layer of oil floats on the surface of the water solution to retain heat and to reduce evaporation. A low-water protection system is designed to prevent damage to the nine heating elements in the tank. The new pressure washers use Karcher’s tri-plunger, high-pressure pump that accepts water up to 180F.
September 28, 2010