concept is simple. As warm/hot drain water flows down the vertical
heat exchanger it clings to the surface of the inner section forming
a very thin film of water. This thin water film allows for ultra-high
heat transfer. Heat that was normally wasted now instead is rapidly
absorbed by cold water flowing through the outer section.
freshwater exiting the heat exchanger then proceeds to the conventional
water heater. This preheating of the water before it enters the
water heater substantially reduces the energy/fuel used by any water
Heat Recovery: Decade after Decade
last thing anyone needs is something new to keep clean. That's why
ReTherm is specifically designed to never need cleaning. Many types
of heat exchangers require cleaning to maintain top performance,
but not ReTherm. The fast moving water on the vertical center section
continually scours the heat transfer surfaces. This prevents build-ups
that would otherwise rob performance. With ReTherm it's all about
lifelong, hassle free heat recovery.