WHAT SIZE UNIT DO I NEED AND SHOULD IT BE A HOT OR COLD WATER MODEL

There are three major factors to compare in order to find the right pressure washer selection and size:

Difficulty of the cleaning job:

Depending on how difficult it is to powerwash the dirt from an object or surface and also depending on what type of dirt is being removed, you should determine the size of the machine. If you use a cart pressure washer to powerwash a car or boat , or maybe for patio cleaning, purchase a small to medium size pressure washer, but, if you use it to remove oil, grease and fuel spills, then you will need a larger hot high power washer.

Frequency of use:

If you plan to pressurewash and use the equipment frequently, you should choose one with high ratings in order to increase efficiency and minimize time. Smaller washers are suitable for short and less frequent jobs. Larger washers are right for bigger jobs with frequent use. If you plan to use the powerwasher for less then 20hrs/year you will need a residential size unit. If you plan to use it around 30hrs/week you need to consider a commercial pressurewasher. Finally, if you know that you will be using it for 40hrs/week or more you will need to invest in a heavy duty industrial pressure washer.

Cost:

Machines with greater PSI and GPM cost more. In addition, hot water pressurewashers are more sophisticated and more expensive than the cold-water pressure washers. Some cleaning jobs require plenty of water and very little pressure, and some require a very high pressure and less water. Depending on the type of the job you will be performing you have to make a decision on what washer is most suitable for completing the job most effectively.
Not sure if you need a cold or a hot water pressure washer?

Once you have determined what applications you will be performing with your power washer you will then be able to decide what type of unit you will need to purchase. Here is a general guideline for what the cold and hot water units are considered to be best for:

Cold Water Power Washers

Cold water units are best suitable for car, deck, patios, sidewalks, houses, roofs and truck power washing. Also, if you have a car washing or an airplane pressure washing business cold water power washers are the best machines for the job.

Hot Water Powerwashers

On the other hand, hot water pressure washer models are excellent for oil, grease, and fuel spills, and for sanitizing. Hot water pressure washers are also the best choices for places such as garages, industrial plants, agriculture machinery, service station areas, food processing plants, farms, malls and airports.