The main difference is that power washing uses highly pressurized steam to do the cleaning while pressure washing just uses unheated tap water, without the help of a heating element.

In short, the amount of time it takes to power wash a house is dependent on several factors. Every home is unique, from its square footage to the materials it's made from, making it difficult to give an exact estimate. For example, a 2,000 square foot home can take anywhere from one to three hours to power wash.

In general, houses should be power washed at least once a year any time between March and November. As it gets later in a calendar year, you'll want to make sure your home is taken care of before the freezing temperatures and winter weather arrive.

You'll need a power washer that provides a force of 3,000 PSI or more. The higher the pressure, the better and faster is the cleaning. If you want to use a lower pressure on certain surfaces, you can always attach a larger spray tip to it.