The 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.

The preheated 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 heating system.

High Performance Heat Recovery: Decade after Decade

The 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.

ReTherm delivers more than just energy savings to the residential and small business sectors. It's an elegant solution with no drawbacks.

Regardless of what type of "powered" water heater is used ReTherm significantly reduces domestic water heating costs. Whether using:

All water heating systems run less and use less energy when using ReTherm heat recovery. With ReTherm lower water heating costs are a sure thing whether bills arrive from the local oil supplier, the propane guy, the natural gas or the electric company. By putting a stop to needless energy waste you win and the environment wins too.

• US Department of Energy
• Canadian Office of Energy Efficiency
• and independent university studies