Fuel Oil Heated and Electric Powered Series
Fuel-oil heated hot water pressure washers use heating fuel, such as oil, kerosene, or diesel, to heat the water. The motor that runs the high-pressure pump runs on electricity.
359 Trousdale Dr., Ste. B
Chula Vista, CA 91910
Hotsy has the following hot water pressure washer series and models that are heated by fuel oil and electric powered:

9400 Series Heating Modules
The 9400 Series Heating Modules give customers the flexibility to "convert" a cold water pressure washer into a hot water unit. By attaching the heating module to a cold water pressure washer (i.e. Hotsy 1700 Series) the pressurized water is now heated to produce all the benefits of hot water cleaning. The four models use fuel oil, diesel, or natural gas to heat the water using Hotsy's high-efficiency, vertical heating coil. All models are equipped with a flow switch to control the burner. All models are ETL-Certified to the rigid UL-1776 safety standards and CSA-Certified.

555HE
The new 555HE is the most efficient hot water pressure washer in our lien. It features a technologically advanced heat exchanger that takes water to higher temperatures much faster, saving time and money. the Hotsy 555HE is also lighter and smaller, making it more agile and portable that it's predecessor, the 555SS.