products claim to be zero maintenance, but in reality still require
some maintenance. ReTherm drain water heat exchangers are designed
to operate decade after decade with absolutely zero maintenance.
When it comes to saving energy they are as simple as insulation:
install it and let energy savings accumulate.
With no moving
parts or valves to seize, break or wear-out it shouldn't come as
a surprize that there is no maintenance involved. Older style drain
water heat exchangers built in the 70's and 80's required yearly
cleaning to maintain top performamce, but ReTherm never requires
cleaning. The rapidly flowing vertical water film self-scours the
inner wall of the heat exchanger preventing any build-ups that would
reduce heat transfer and energy savings.