A customer discussed with me his concern about our SS using non-heated water for high pressure rinse because he said it freezes on his car by the time he goes to dry it. Temps were around 10 degrees F at that time. We have four high pressure functions (soap, wax, clear coat, and rinse) and only the HP rinse is non-heated. I told him no chemical is injected so it doesn't need heat but really that's just the way my place was when I bought it. I don't think I need heated water for the wax or clear coat but I never changed it. It got me thinking though, would it be wise to switch to heated water for all HP functions during cold temps maybe 20 degrees or colder F? I don't think it would make much difference and this has been the only customer to ask me about it.