What you will be cleaning will designate if a cold water washer or hot water washer is needed.
At Hotsy, we are contacted weekly by people who bought a cold water washer from a big box store and find it’s not delivering the cleaning power they expected or needed. Hotsy has over 130 models of cold and hot water pressure washers. We’ll do a free on site Cleaning Analysis & Efficiency Survey to understand your specific cleaning requirements, and then recommend the best pressure washer – cold or hot water – to solve your toughest cleaning problem. Cold water pressure washers clean by blasting the surface with pressurized water. Rule of thumb – the higher the gallonage and pressure the cold water washer produces the better it will clean. However, when that water contacts grease and oil it hardens these substances and actually makes them more difficult and time consuming to remove and after it is removed there will still be a greasy oily residue.
A hot water pressure washer cuts through the viscosity of grease and oil and melting it away leaving a smooth
dry surface with no oily residue left behind and many times at lower pressures than a cold water machine. If you try to wash greasy hands with cold water the results are poor, add detergent and they get a somewhat cleaner, but for maximum results hot water and detergent is used. This same rule applies to pressure washer application. If oil or grease is present in any form, then you will need a hot water pressure washer. The fact is, almost everything comes cleaner when using hot water.