In many businesses, hot water simply stands in pipes most
of the time. You can make a big dent in this type of heat loss by seeing to it
that your system is well insulated.
Ask your building supply house for the proper insulation
to use on pipes, and buy an approved kit to safely insulate your water heater.
Review Table 8 for an estimate
of the heat lost in copper pipes and the potential energy savings from insulation.