Making Hot-Water Recirculation Pay
With new pump technology, hot-water recirculation is about to get more efficient
For some time, mechanical recirculation systems have been the go-to solution for homeowners tired of waiting for hot water from their showerheads and faucets. These systems eliminate the wait for hot water as well as the waste represented by thousands of gallons of potable water being allowed to run down the drain. But recirculation systems also incur electrical costs from powering the pumps used to circulate the water. Enter ECM (electronically commutated motor) circulators, which promise extreme efficiency along with prompt delivery of hot water. Developed in Europe and already adopted in the United States for hot-water heating applications, these high-efficiency pumps are now poised to make domestic hot-water recirculation truly economical. Master plumber Dave Yates, a big advocate for these systems, explains in this article why these new motors make such a difference.
Photo: Edward Caldwell