Basically, light duty models will run only between 1300 to 2000 psi, which is enough to clean your car with. They are also inexpensive and very light in weight. 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. If you have a patio with a wood deck, you know how difficult it is to remove dirt as well as grease and grime caused by your grill. You can use pressure washers to clean these things but always remember that you need to be careful when working with wood and pressure washers. This is because the pressure coming out of the washer will be so powerful that it can destroy the wood if you linger too long on one area. Some are so powerful that it cannot be used on cars as the pressure along will be so powerful that it can damage the car s paint job, while some are designed to efficiently clean hard-to-remove stains on surfaces such as grease and grime. First of all, you may want to find out if you need a mobile pressure washer or a stationary one. Pressure washers can also be used to clean the gutters. You know that cleaning gutters before needs you to climb up on a ladder and manually remove the muck and dried leaves by hand. With a pressure washer, all you need to do is go up the ladder, aim the nozzle, and blast away the much and leaves from the gutter. Most pressure washers are already equipped with accessories. However, if it is not, you might want to consider buying the accessories yourself. You have to get extension wands in order for you to reach high places, water brooms to clean large flat areas, and different types of nozzles that you can attach to the wand. Whatever your reasons are, you will find that pressure washers will be able to make the job of cleaning easy for you. Besides, using a scraper, a scrub brush, and a bucket full of soapy water to do the job will definitely turn you off. With a pressure washer, you will see that the job will be a lot easier to do.