There are two types of pressure washers available on the market: electric and petrol. Both perform broadly the same functions, but vary in power, size and performance. The type of pressure washer you should buy depends on your needs.
Electric. This is the most common type of pressure washer, as they are inexpensive and there are models for both domestic and industrial use. This type of equipment does not generate any kind of emissions or excessive noise, and its operation will only depend on having the appropriate electrical current.
Petrol. These pressure washers operate independently and can be used anywhere with adequate ventilation. Their use is recommended for professional or industrial jobs, and their operation depends only on the right fuel. They are generally much rougher and heavier equipment.