It ejects water at a very high pressure that it can strip away hard to remove dirt from almost any type of surface. With it, cleaning your patio wood deck, gutter, roof, garage concrete floor, and even your car will be a lot easier and a lot more efficient. However, if you plan on using a pressure washer for a much more difficult cleaning task, such as getting rid of grease from your garage s floor or using it extensively, then a hot water pressure washer is for you. In Fact, 2500psi would be enough to strip off the paint from your car. If you plan on using the pressure washer indoors, then an electric pressure washer should be your choice. It s more expensive and less powerful than gas but it doesn t emit toxic fumes like gas powered pressure washers. But, if you want more power and you are somewhat on a tight budget and you only plan on using the pressure washer outdoors, then a gas powered pressure washer would be much more ideal for you. You have to consider the fact that the hardness as well as the durability of each of these surfaces is different. For example, the engine components will be very durable and sturdy. The windshields as well as the glass parts are hard but they are also brittle. The metal body of the vehicle is also hard and sturdy but if you use too much pressure, the paint can be damaged. You can use the soap attachment with a cleaning solution to get rid of grease and grime under your barbecue grill. Then, before the soap dries on the deck, wash it off with the high pressure washer. The high pressure will help remove stains and loosen or remove dirt on the patio wood deck. Just remember to spray the deck with the nozzle remaining a constant 12 to 14 inches away from the deck. Always remember that the higher the output pressure is, the better it is in cleaning. However, keep in mind that you still need to select the pressure level according to intended application. If you are going to use the pressure washer for washing a car, then you might want to settle for a less powerful model. Rinsing the house means that you have to get the entire soap residue and dirt films off the house. When buying pressure washers, you have to remember that the most important thing that you should look for is the amount of pressure it gives. It is measured in PSI. The amount of PSI you should get for a pressure washer should at least be 2000PSI.