These are simply different units of measurement for pressure. 1 bar equals approximately 14.5 PSI (pounds per square inch) or 0.1 MPa (megapascals). For example, a 150 bar pressure washer is equivalent to about 2,175 PSI or 15 MPa. European manufacturers typically use bar, while American manufacturers often use PSI. When comparing pressure washers, make sure you're comparing the same units or convert them for an accurate comparison. Remember that effective cleaning depends not just on pressure but also on water flow rate (measured in liters per minute or gallons per minute).

Hot water pressure washers are significantly more effective for cleaning oily, greasy surfaces or for sanitizing purposes. The heat helps break down oils and grease, reducing the need for chemicals and cleaning time. They're particularly valuable for commercial kitchens, food processing areas, vehicle workshops, and industrial settings where oil and grease are present. For general cleaning of dirt, mud, and light grime, a cold water pressure washer is usually sufficient and more economical to hire. If you're unsure, our team can advise based on your specific cleaning requirements.

Most electric pressure washers require a standard mains water supply with adequate flow rate (typically at least 6-10 liters per minute) and pressure. They connect to a standard garden hose with a 3/4" connection. For power, domestic electric models typically run on standard 13A household supply (230V), while more powerful commercial electric models may require a 16A or 32A supply. Petrol and diesel models don't require an electrical connection but still need a water supply unless you opt for a model with a built-in water tank. For remote locations without water supply, we offer trailer-mounted units with water tanks. Always check the specific requirements for your chosen model.