There are numerous benefits of using hot water over cold water. Warmer water temperatures tend to break down the molecules of stubborn substances such as oil and gum and removes them much more effectively than cold water. If you are looking to clean surfaces that have grease and grime then you will want to use warmer water for the job. You can also do the job by pressure washing surfaces outside or in commercial settings.
Hot water is also a very good disinfectant and requires very little detergents or chemicals to clean with. If you have a big cleaning job to do such as a driveway or other large surface area, then getting a cleaning system will be your best bet. It takes less time than trying to clean the surfaces by hand or with a garden hose alone.
If you are a homeowner you may want to use hot water to clean the surfaces around your home that require cleanliness and sanitation or just to get rid of greasy grimy surfaces from oil spills or other chemicals that have stained or saturated your concrete or blacktop. It is better also to clean with hotter temperatures because the surface area will get cleaner without any added chemicals and this is a lot safer for the environment. Hot water alone can clean better than cold.
For any tough cleaning jobs that you have either at home or on the job, investing in a pressure washer is worth the money. They have many different kinds of units for sale but not all are equal in how they clean. You must do some research on which ones are the most effective and whether they use gas or electric power depending on your specific needs.
Some units do not clean as well as others due to the type and amount of pressure they provide. If you have a big cleaning job and large surface areas to clean you may want to consider a unit with higher pressure and higher temperatures than say a unit with lower pressures and temperatures.
Using a cleaning unit will remove most surface grime and grease if used with hot water versus cold. It is far more effective and takes less time and energy and you will also save money compared to how much chemical you have to use in the water and the time it takes to get the job done.