Hot Water VS Cold Water Pressure Cleaning | Which is better?
It is important when comparing the use of hot water and cold water for pressure cleaning to realise that one method is not always better than the other for every situation. Although both can achieve excellent results, the temperature of the water can make a huge difference depending on the kind of dirt, staining and surface being cleaned.
At Wright Pressure, we use professional pressure cleaning equipment when cleaning exterior surfaces all over Melbourne, removing the grime, mould and other unappealing contamination that has built up. Our experience has taught us that it is just as important to select the correct cleaning method and temperature as it is to select the right pressure and equipment for the job.
What is the difference between pressure cleaning with hot water and pressure cleaning with cold water?
Cold water pressure washing involves the use of water under pressure at its usual supply temperature to remove dirt, mould, mud, algae and other surface contaminants.
A hot water pressure cleaning system increases the temperature of the water within the burner before it gets to the surface being cleaned. The extra heat can have a bigger impact on loosening stains such as oil, grease and those black mould spots you often see on concrete. All of which would be more difficult to remove using cold water alone.
The main difference lies in the fact that cold water depends more on the mechanical cleaning pressure, whereas hot water uses pressure together with heat in order to help dissolve the contamination you're aiming to clean. The standard heat that hot water pressure cleaning uses heavily depends on the type of surface and what's exactly on it that needs to be cleaned; however, generally speaking, the average temperature sits between 60-90 degrees Celsius for hot water pressure cleaning.
When Is Hot Water Pressure Washing Better?
Hot water pressure washing works best for cleaning oily/greasy surfaces, as well as surfaces embedded with severe black mould growth. The heat helps break down grease, oil, and organic grime faster than cold water. This method is good for cleaning concrete driveways, car parks, garage floors, engines, and restaurant equipment, as well as many other industrial zones. It also helps kill bacteria and remove tough stains. If you need to clean surfaces with a lot of oil, dirt, or sticky substances, use hot water for better results.
Using hot water during pressure washing has a significant advantage over cold water when it comes to the duration of a pressure washing service. At Wright Pressure, we find that using hot water can speed up the cleaning process by anywhere from 50%-200% when combined with chemical pre-treatments.
We carried out tests at Wright Pressure on the use of hot water to clean mould off concrete using our surface cleaners at temperatures of about 80 to 90°C. In one of these tests, the hot water eliminated 90% of the black organic growth from the concrete after two passes, whereas surface cleaning that same area using cold water alone made no difference and required using the high-pressure gun. This showed that heat has a massive benefit when it comes to cleaning certain organic buildup compared to cold water alone.
In this same case, a heavy chemical pre-treatment would be required for cold water to achieve a similar result.
When is cold water pressure cleaning enough?
Cold water is generally good enough when it comes to basic light-to-moderate buildup on most surfaces and can still tackle heavy grime as long as a chemical pre-treatment is involved; however, the main difference is that it can take twice as long when using cold water. So, in short, it can still achieve a good result, but the duration it takes to clean is simply longer.
Cold water pressure cleaning is still a good choice for a great many ordinary cleaning tasks, since general dirt, loose grime, mud and various surface contaminants can generally be removed quite effectively without the water having to be heated.
Cold water equipment can also be more economical to run since it doesn't need fuel or energy for heating the water; if the task doesn't benefit much from extra heat, then using a hot-water machine might give only a small practical advantage and often isn't required.
Cold Water is enough when it comes to painted and exterior surfaces, as high heat doesnt contribute to any beneficial effect and can aslo melt paint if used.
Is hot water more effective at cleaning concrete?
Generally, yes, but it can all depend on what you want to get rid of.
Cold water pressure cleaning will usually be enough for ordinary dirt and a number of kinds of organic growth if the right cleaning method is used; in cases where oil, grease or some particular persistent contaminants are present, hot water may have the advantage.
It is also important to realise that the black stains on concrete are not always of the same kind. Stains caused by mould, algae, tyre marks and oil contamination all need different treatments, and in some cases stains which have penetrated deeply may still remain even after careful cleaning.
What we do is to look at the specific situation and choose the method which is most likely to produce a good result without needlessly damaging the surface. Raising the pressure or temperature is not always the solution.
Hot water pressure cleaning cons
Since hot-water equipment involves a heating system and uses extra energy or fuel (generally diesel) it is generally more expensive both to buy and to operate, and it also has higher maintenance requirements.
Hot water might be worth using if it increases cleaning efficiency or makes it easier to remove heavily contaminated surfaces. The total value will depend on the particular task, the time gained, and the result obtained.
Cold water pressure washing is usually the more practical choice when it comes to regular cleaning, while hot water has its advantages in certain situations.
What pressure cleaning method should you choose?
At Wright Pressure, we never adopt the same method for all surfaces; instead, we take into account the surface in question, the kind of contamination and the result that the customer wants before choosing the most appropriate approach.
In some cases, cold water together with professional pressure cleaning equipment is all that's needed, while in other instances, hot water offers an extra benefit—especially when dealing with greasy or tenacious contamination.
We want to obtain the best possible result by using the correct combination of equipment, temperature, pressure and cleaning treatment.
If you need professional pressure cleaning in Melbourne, Wright Pressure will be able to examine your driveway or exterior surface and suggest an appropriate cleaning method. Get a quote from us and find out how our pressure washing services can help enhance the look of your property while maintaining safety and
cleanliness.
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