See Below for Video

Tests have proven that Kärcher Classic hot water pressure washers use 25+% less fuel than standard models—thanks to these exclusive design features:

1: Heat is both absorbed and 'bounced' off a firebrick floor retaining the heat longer in the heating chamber;

2: A double-pass coil forces water to pass through the heating chamber twice for added heat-transfer efficiency;

3: Outside air serves as an insulation blanket and is pre-heated prior to being injected into the flame for optimum combustion.