Here’s a little more thorough explanation of bleach and hot water.
Basically, in a laundry cycle the bleach is added at the very last water fill wash cycle (before final rinse) and this should always be done with hot water or else the bleach won’t activate and be effective in the short amount of time it’s in contact with the linens in this final cycle. We actually just invested in ozone technology for our washers which means that we can do the entire wash process in cold water and with minimal detergents, except for the last cycle with bleach (which is only a whitening agent at this point as the ozone completely sterilizes and sanitizes). We’re able to cut hot water usage down by about 80% and use on-demand water heaters instead of inefficient tank ones. Thus; cold water with peroxide and cold water recommended detergents, then bleach with hot water. Every industrial laundry facility I’ve toured, the equipment manufacturers, and chemical companies like ECOLAB have all be telling us the same process because I have tried desperately to eliminate the need to hot water in our process due to the insane cost of commercial rated water heaters and the energy/environmental impact of heating water.
@RiverRock I wasn’t able to reply to my own post anymore due to limits but thought it would make sense to start a new thread here