The traditional continuous-running pumps -- although they save water -- end up wasting a lot of energy constantly heating water and circulating it around the home.
- Most green builders are moving to on-demand hot water recirculation pumps, where you push a button and the pump turns on.
- There are several manufacturers and some even come with a remote control so it can be used in several rooms. The button is typically put in the master bath or the furthest plumbing fixture from the water heater.
For more information:
Read Gennaro Brooks-Church'sQ&A "Do you have any suggestions for hot water recirculating pumps? I hate to waste water before our showers."