Drain Water Heat Recovery

Heating water accounts for up to 20 percent of a home’s energy use, making it the second-highest energy consumer after space heating.

Drain-water heat recovery systems capture the heat from water going down a drain, typically the shower, and use it to heat cold water entering your water heater. It’s particularly effective when there are simultaneous water flows i.e., when you’re using hot water in the shower while water is flowing down the drain.

Things to Consider

• Look for an ENERGY STAR® certified product. Drain-water heat recovery systems can be purchased through your local plumber, a plumbing wholesaler or online
• Drain water heat recovery systems are recommended for homes with higher-than-average hot water consumption (usually three or more people). The savings are greatest when all occupants take showers
• These systems typically last 30 years or more. The technology is simple and long-lasting, with no moving parts
• Hire a licensed plumber to install the system. It most cases, the installation will take a couple of hours
• Consider getting a home energy evaluation to help you understand how your home uses energy and identify all improvement opportunities
• Check with your municipality, utility, or retailer to see if rebates are available

Source: Natural Resources Canada