The Therm 635-1 is a big, solid and very well made hot and cold pressure washer intended for years of industrial and commercial use.
The pressure of the Therm 635-1 (T) can be fully adjusted and at maximum will give nearly 2000 psi. The boiler unit is probably the best used on any make of mobile steam cleaner on the market being machined out of 1/4" inch galvanized plate steel. The flame chamber is within an inner cylinder ensuring that the flame does not directly touch the coil which eliminates sooting up. Kranzle machines are also renowned for low servicing costs and excellent efficiency.