Hot Water vs. Cold Water Pressure Washing :
Differences between Hot & Cold
The type of material that you are washing will ultimately determine the need for either a Hot Water pressure washer or a Cold Water pressure washer. There are both “chemistry” and “physics” that come into play here.
- Chemistry changes the properties of the target being washed. Hot water (in excess of 165 degrees) will get oil/grease/gum/etc moving thus allowing the cleaning process to go faster.
- Physics is the actual GPM (Gallons per minute) and PSI (pounds per square inch) that is being applied. The higher the volume of water (GPM) the more material you can move. The higher the PSI the more impact you will have
Hot Water Pressure Washer Hot water pressure washers clean faster and deeper than cold water and are especially effective in removing grease, grime and oil. Hot water pressure washers typically generate a spray of 180° F or higher. While even hotter water is sometimes needed (steam), it has been proven that hot water under pressure cleans faster and better than steam (low pressure).
Cold Water Pressure Washer Pressure washing with cold water is adequate for some applications. Hot water will always clean faster, especially where greasy and oily surfaces must be cleaned. The addition of detergents (also known as chemicals or soaps) which have been formulated especially for pressure washers will enhance cold water cleaning