Companies that manufacture pressure washers are now introducing new technologies as well as mechanical changes to their product. It is a lot more efficient in cleaning and it also has features that will make cleaning easier for you to do. So, what are the technologies included in new pressure washers? And, you have to choose the right one that fits your needs or else you may end up with a pressure washer that is too powerful that it can damage your property or too weak that it won t clean effectively. So, the first thing that you have to do when buying a pressure washer is to determine how you will use the equipment. However, if you are planning to use the machine for heavy duty cleaning, such as cleaning a building s concrete wall or to get rid of grease and grime stuck on your garage s floor, the heavy duty pressure washer would be your best choice. Another factor that you have to consider is if you need a cold water or hot water unit. Your wood deck is filled with dirt, stains from food and alcoholic beverages as well as grease and grime located near your barbecue grill. By the looks of it, cleaning the entire place will take a very long time. And, you will think that it will require a lot of work in order for you to get your patio ready again for another big party. You need to remember that using cold water pressure washers to get rid of grease on a particular surface will make the entire job a lot harder. This is because the water will be cold or in room temperature. This means that it will eventually turn the grease in to a hard and waxy substance that will even be harder to remove even with the pressure washer. If you are just going to use the pressure washer for washing your car or cleaning down your patio s wood deck, then a pressure washer with a maximum of 1500psi would be right for you. However, if you are going to use the pressure washer for heavy duty cleaning and extensive household cleaning tasks, a pressure washer with 2000psi should be perfect for your needs.