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For many commercial enterprises,

the cost of heating water is their largest energy expense but most of this water ends up going down the drain. Warm drain water is a source of potential energy savings often ignored.

In fact, approximately 90% of the energy used for water heating is wasted down the drain. In North America alone this loss represents about $40 billion each year.

A Power-Pipe® Drain Water Heat Recovery (DWHR) System can recover a large portion of that energy and generate significant cost savings in a broad range of commercial applications, while reducing greenhouse gas emissions.

Major applications include:

  • Spas and health clubs
  • Restaurants
  • Cafeterias
  • Hotels
  • Laundries
  • Healthcare facilities
  • Office buildings
  • ANY APPLICATION where an important quantity of  hot water is wasted
A Power-Pipe DWHR System in commercial applications can generate savings of up to 60% on water-heating-associated energy costs. In addition, the initial investment in a Power-Pipe System is modest. Thus, commercial enterprises can expect a solid return on investment and a full payback in 1 to 5 years.

Power-Pipe DWHR Systems are all-copper, double-walled heat exchangers that efficiently recover heat energy from wastewater and use it to warm incoming cold water.

Technically known as a falling film heat exchanger, the Power-Pipe is based on a fundamental physical principle called the "falling film" effect. Water falling down a vertical drain stack does not run down the middle of that stack, but instead clings to its inside wall. This creates a thin "falling film" from which the all-copper Power-Pipe can readily recover heat energy.

Power-Pipe Systems are scalable for use in large flow and low flow applications. Also, they are UL listed and safe for use in potable water applications, such as food preparation. Made of quality materials throughout, Power-Pipe Systems require little or no maintenance.

In addition, Power-Pipe Systems are backed by full technical support. This free support includes energy savings studies, feasibility analyses, system design consultations, CAD drawing elements, and installation support.

Power-Pipe Systems are simple, effective, and foolproof. In diverse commercial applications, the Power-Pipe is a demonstrated way to save energy and money and to reduce greenhouse gas emissions throughout the long service life of the system.

In short, Power-Pipe Systems: 


The Power-Pipe was designed and is manufactured by RenewABILITY Energy Inc. (REI), a developer of cost-effective energy saving solutions for institutional, commercial, industrial and residential customers around the world.

To learn more about Power-Pipe DWHR Systems, or to get started with an installation: