Indirect water heaters may be the most important technology
enhancement to enter the residential hot water industry in the
past 30 years. Two key needs have driven demand for these useful
and practical heating units: fuel efficiency and an ever
increasing desire for more hot water. Hot tubs, large baths, multihead
showers, and bigger homes with more bathrooms have
increased America’s appetite for hot water, and indirect water
heaters can satisfy the need faster than any other technology.
Water Heating Choices
Before the advent of indirects, the options for heating domestic
potable water included conventional direct-fired units or boilerintegrated
“tankless coils.”
Direct-fired water heaters (electric-, gas-, or oil-fired) are by far
the most