The perfect solution for turning a cold water pressure washer into a hot water pressure washer. Our Kärcher Series water heater provides supplemental heat to cold water machines, giving users the benefits and advantages of hot water cleaning when needed. An electric-powered diesel heated unit, the Heater 5.0/30 Ed effectively heats water at a rate of up to 5 gallons per minute. ETL certified to UL & CSA standards.