The hot water fanatics are at it again. Because everyone is after dustmites and because some new fibers will tolerate higher temperatures, it is believed that cleaning with very hot water is advantageous. There is some merit to the argument, but how hot is hot?
Indianapolis Power and Light Company did a study about the effects of hot water on human skin. A pediatrics association in a local emergency room said that water with a temperature of 140F causes third burns on adult skin in only six seconds. A child's skin is far more sensitive. The element of high pressure added to extremely high temperature compounds the problem. A broken water hose in a home or office could be catastrophic. Water pressure in the cleaning industry is touted from 400 to 2,600 psi (pounds per square inch). The hot water crowd is talking 220F to 240F (live steam). Our truck-mounted system has the capability of heating water to 190F, however, our automatic water temperature control valve is preset in the factory at 150F. The water pressure is 120 psi which is very safe and effective. A restaurant association says that water at 140F is safe for sanitary dish washing. Bugs die at an even lower temperature.
So, how hot is hot? Hot enough to clean, but safe enough for humans.......and safe enough to prevent accidents.