residential multi-unit residential industrial commercial energy utilities resource center investors our partners site map privacy policy

For energy efficiency agencies and power utility services 

who offer customer energy efficiency incentive programs, success can be elusive. Many fall short of their projected results.

Success depends on a number of variables, all of which must be correctly handled. These variables include:


Several studies on Drain Water Heat Recovery (DWHR) Systems have shown that performance varies widely between brands, and that the Power-Pipe® DWHR System consistently outperforms other types of DWHR Systems.

The Power-Pipe helps homeowners, business customers and industrial clients realize immediate and long-term energy savings, and this with a modest initial installation cost. A well planned incentive program can allow you to generate energy savings while controlling your overall program costs.

Power-Pipe DWHR Systems are all-copper, double-walled heat exchangers that efficiently recover heat energy from wastewater and reuse 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 the 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.

The Power-Pipe System is superior to other falling film heat exchangers as well as to other types of heat exchangers because of its patent-pending design. It consists of multiple coils of copper tube, wrapped together around a central copper drainpipe. Copper is used because of its efficiency as a heat conductor. As a result, the Power-Pipe has a high heat transfer rate on a surface area basis.

A typical 60-inch Power-Pipe can raise the temperature of incoming cold water from 10°C (50°F) to as much as 24°C (75°F), under equal flow conditions. When this water is then directed to the water heating system for further heating, that system is not required to use as much energy as it would without a Power-Pipe installed.

By installing a Power-Pipe, homeowners can expect to save up to 40% on their overall water heating costs. Industrial customers and commercial enterprises can save up to 70%.

The Power-Pipe's performance has been verified by Natural Resources Canada, the University of Waterloo, as well as other American and Canadian agencies and power companies, in independent third-party testing. In diverse applications, the Power-Pipe is a proven way to save energy and money and to reduce greenhouse gas emissions throughout the long service life of the system.

Power-Pipe DWHR Systems are manufactured using quality materials, yet, the initial investment in a Power-Pipe System is modest. Because of this advantage and because of the important savings on energy costs the system generates, institutions can expect an excellent return on investment.

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